San Marcos, Texas, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
San Marcos, Texas, United States
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
4th Aug 2026
68AQILowest AQI recorded on
11th Aug 2025
27AQISame Day Analysis (7th August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 46 of Good air quality on the same day.
Day & Night AQI Trend: 7th Aug - 8th Aug 2026
San Marcos, Texas, United States
AQI
Day
Night
.
6 AM7th Aug 2026
8 PM
5 AM8th Aug 2026
Day time
Avg. Highest Time
12PM7th Aug
51AQI
Avg. Lowest Time
8PM7th Aug
40AQI
Night time
Avg. Highest Time
4AM8th Aug
53AQI
Avg. Lowest Time
2AM8th Aug
42AQI
In the last 24 hours,
San Marcos's AQI reached its highest point of 53 at 4 AM during the Night, while the lowest point, 40, was recorded at 8 PM during the Day between 7th Aug and 8th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
San Marcos, Texas, United States
JulAug
10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th
Day
Night
10th Jul 2026176 AMAQI
10th Jul 2026297 AMAQI
10th Jul 2026258 AMAQI
10th Jul 2026329 AMAQI
10th Jul 20263010 AMAQI
10th Jul 20262511 AMAQI
10th Jul 20262612 PMAQI
10th Jul 2026271 PMAQI
10th Jul 2026252 PMAQI
10th Jul 2026323 PMAQI
10th Jul 2026494 PMAQI
10th Jul 2026395 PMAQI
10th Jul 2026446 PMAQI
10th Jul 2026447 PMAQI
10th Jul 2026448 PMAQI
10th Jul 2026339 PMAQI
10th Jul 20262610 PMAQI
10th Jul 20262811 PMAQI
11th Jul 20262612 AMAQI
11th Jul 2026251 AMAQI
11th Jul 2026262 AMAQI
11th Jul 2026313 AMAQI
11th Jul 2026284 AMAQI
11th Jul 2026265 AMAQI
29°C23/36°C
11th Jul 2026256 AMAQI
11th Jul 2026277 AMAQI
11th Jul 2026238 AMAQI
11th Jul 2026279 AMAQI
11th Jul 20262210 AMAQI
11th Jul 20262511 AMAQI
11th Jul 20263412 PMAQI
11th Jul 2026441 PMAQI
11th Jul 2026302 PMAQI
11th Jul 2026253 PMAQI
11th Jul 2026254 PMAQI
11th Jul 2026185 PMAQI
11th Jul 2026176 PMAQI
11th Jul 2026257 PMAQI
11th Jul 2026168 PMAQI
11th Jul 2026169 PMAQI
11th Jul 20261810 PMAQI
11th Jul 20262611 PMAQI
12th Jul 20263012 AMAQI
12th Jul 2026301 AMAQI
12th Jul 2026302 AMAQI
12th Jul 2026243 AMAQI
12th Jul 2026284 AMAQI
12th Jul 2026315 AMAQI
28°C25/36°C
12th Jul 2026346 AMAQI
12th Jul 2026337 AMAQI
12th Jul 2026368 AMAQI
12th Jul 2026409 AMAQI
12th Jul 20264210 AMAQI
12th Jul 20264011 AMAQI
12th Jul 20263812 PMAQI
12th Jul 2026331 PMAQI
12th Jul 2026342 PMAQI
12th Jul 2026343 PMAQI
12th Jul 2026324 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026336 PMAQI
12th Jul 2026347 PMAQI
12th Jul 2026298 PMAQI
12th Jul 2026229 PMAQI
12th Jul 20262110 PMAQI
12th Jul 20262011 PMAQI
13th Jul 20262012 AMAQI
13th Jul 2026231 AMAQI
13th Jul 2026252 AMAQI
13th Jul 2026273 AMAQI
13th Jul 2026164 AMAQI
13th Jul 2026195 AMAQI
29°C24/36°C
13th Jul 2026236 AMAQI
13th Jul 2026207 AMAQI
13th Jul 2026228 AMAQI
13th Jul 2026259 AMAQI
13th Jul 20262410 AMAQI
13th Jul 20262411 AMAQI
13th Jul 20262412 PMAQI
13th Jul 2026221 PMAQI
13th Jul 2026242 PMAQI
13th Jul 2026253 PMAQI
13th Jul 2026234 PMAQI
13th Jul 2026285 PMAQI
13th Jul 2026366 PMAQI
13th Jul 2026347 PMAQI
13th Jul 2026388 PMAQI
13th Jul 2026289 PMAQI
13th Jul 20261610 PMAQI
13th Jul 20261411 PMAQI
14th Jul 20261712 AMAQI
14th Jul 2026201 AMAQI
14th Jul 2026382 AMAQI
14th Jul 2026543 AMAQI
14th Jul 2026384 AMAQI
14th Jul 2026305 AMAQI
28°C25/35°C
14th Jul 2026346 AMAQI
14th Jul 2026347 AMAQI
14th Jul 2026428 AMAQI
14th Jul 2026359 AMAQI
14th Jul 20263410 AMAQI
14th Jul 20264011 AMAQI
14th Jul 20264312 PMAQI
14th Jul 2026441 PMAQI
14th Jul 2026482 PMAQI
14th Jul 2026483 PMAQI
14th Jul 2026524 PMAQI
14th Jul 2026525 PMAQI
14th Jul 2026496 PMAQI
14th Jul 2026517 PMAQI
14th Jul 2026508 PMAQI
14th Jul 2026459 PMAQI
14th Jul 20265510 PMAQI
14th Jul 20263911 PMAQI
15th Jul 20264312 AMAQI
15th Jul 2026451 AMAQI
15th Jul 2026522 AMAQI
15th Jul 2026423 AMAQI
15th Jul 2026364 AMAQI
15th Jul 2026475 AMAQI
25°C23/31°C
15th Jul 2026346 AMAQI
15th Jul 2026367 AMAQI
15th Jul 2026488 AMAQI
15th Jul 2026409 AMAQI
15th Jul 20264410 AMAQI
15th Jul 20264211 AMAQI
15th Jul 20264212 PMAQI
15th Jul 2026381 PMAQI
15th Jul 2026442 PMAQI
15th Jul 2026173 PMAQI
15th Jul 2026284 PMAQI
15th Jul 2026185 PMAQI
15th Jul 2026206 PMAQI
15th Jul 2026197 PMAQI
15th Jul 2026288 PMAQI
15th Jul 2026269 PMAQI
15th Jul 20262810 PMAQI
15th Jul 20262811 PMAQI
16th Jul 20264412 AMAQI
16th Jul 2026301 AMAQI
16th Jul 2026342 AMAQI
16th Jul 2026363 AMAQI
16th Jul 2026464 AMAQI
16th Jul 2026545 AMAQI
25°C23/28°C
16th Jul 2026506 AMAQI
16th Jul 2026537 AMAQI
16th Jul 2026548 AMAQI
16th Jul 2026509 AMAQI
16th Jul 20264210 AMAQI
16th Jul 20263611 AMAQI
16th Jul 20264612 PMAQI
16th Jul 2026421 PMAQI
16th Jul 2026452 PMAQI
16th Jul 2026503 PMAQI
16th Jul 2026444 PMAQI
16th Jul 2026445 PMAQI
16th Jul 2026346 PMAQI
16th Jul 2026287 PMAQI
16th Jul 2026268 PMAQI
16th Jul 2026249 PMAQI
16th Jul 20262510 PMAQI
16th Jul 20263011 PMAQI
17th Jul 20263412 AMAQI
17th Jul 2026361 AMAQI
17th Jul 2026382 AMAQI
17th Jul 2026383 AMAQI
17th Jul 2026524 AMAQI
17th Jul 2026525 AMAQI
26°C23/33°C
17th Jul 2026486 AMAQI
17th Jul 2026487 AMAQI
17th Jul 2026468 AMAQI
17th Jul 2026489 AMAQI
17th Jul 20264610 AMAQI
17th Jul 20264011 AMAQI
17th Jul 20264612 PMAQI
17th Jul 2026461 PMAQI
17th Jul 2026502 PMAQI
17th Jul 2026513 PMAQI
17th Jul 2026564 PMAQI
17th Jul 2026555 PMAQI
17th Jul 2026556 PMAQI
17th Jul 2026587 PMAQI
17th Jul 2026548 PMAQI
17th Jul 2026559 PMAQI
17th Jul 20265510 PMAQI
17th Jul 20264811 PMAQI
18th Jul 20265212 AMAQI
18th Jul 2026501 AMAQI
18th Jul 2026502 AMAQI
18th Jul 2026543 AMAQI
18th Jul 2026544 AMAQI
18th Jul 2026575 AMAQI
28°C24/35°C
18th Jul 2026556 AMAQI
18th Jul 2026517 AMAQI
18th Jul 2026538 AMAQI
18th Jul 2026539 AMAQI
18th Jul 20265610 AMAQI
18th Jul 20265611 AMAQI
18th Jul 20266012 PMAQI
18th Jul 2026591 PMAQI
18th Jul 2026662 PMAQI
18th Jul 2026643 PMAQI
18th Jul 2026714 PMAQI
18th Jul 2026665 PMAQI
18th Jul 2026656 PMAQI
18th Jul 2026687 PMAQI
18th Jul 2026688 PMAQI
18th Jul 2026689 PMAQI
18th Jul 20266710 PMAQI
18th Jul 20266611 PMAQI
19th Jul 20266512 AMAQI
19th Jul 2026671 AMAQI
19th Jul 2026632 AMAQI
19th Jul 2026623 AMAQI
19th Jul 2026624 AMAQI
19th Jul 2026565 AMAQI
29°C24/37°C
19th Jul 2026546 AMAQI
19th Jul 2026557 AMAQI
19th Jul 2026518 AMAQI
19th Jul 2026529 AMAQI
19th Jul 20265310 AMAQI
19th Jul 20265211 AMAQI
19th Jul 20265312 PMAQI
19th Jul 2026581 PMAQI
19th Jul 2026632 PMAQI
19th Jul 2026643 PMAQI
19th Jul 2026654 PMAQI
19th Jul 2026675 PMAQI
19th Jul 2026676 PMAQI
19th Jul 2026687 PMAQI
19th Jul 2026738 PMAQI
19th Jul 2026699 PMAQI
19th Jul 20267010 PMAQI
19th Jul 20266411 PMAQI
20th Jul 20266412 AMAQI
20th Jul 2026621 AMAQI
20th Jul 2026642 AMAQI
20th Jul 2026623 AMAQI
20th Jul 2026624 AMAQI
20th Jul 2026625 AMAQI
30°C25/38°C
20th Jul 2026596 AMAQI
20th Jul 2026597 AMAQI
20th Jul 2026598 AMAQI
20th Jul 2026569 AMAQI
20th Jul 20266010 AMAQI
20th Jul 20265911 AMAQI
20th Jul 20266812 PMAQI
20th Jul 2026721 PMAQI
20th Jul 2026702 PMAQI
20th Jul 2026673 PMAQI
20th Jul 2026684 PMAQI
20th Jul 2026725 PMAQI
20th Jul 2026646 PMAQI
20th Jul 2026667 PMAQI
20th Jul 2026608 PMAQI
20th Jul 2026649 PMAQI
20th Jul 20266011 PMAQI
21st Jul 20265712 AMAQI
21st Jul 2026541 AMAQI
21st Jul 2026582 AMAQI
21st Jul 2026563 AMAQI
21st Jul 2026554 AMAQI
21st Jul 2026545 AMAQI
30°C24/38°C
21st Jul 2026556 AMAQI
21st Jul 2026547 AMAQI
21st Jul 2026508 AMAQI
21st Jul 2026509 AMAQI
21st Jul 20265210 AMAQI
21st Jul 20265311 AMAQI
21st Jul 20265512 PMAQI
21st Jul 2026581 PMAQI
21st Jul 2026652 PMAQI
21st Jul 2026653 PMAQI
21st Jul 2026654 PMAQI
21st Jul 2026675 PMAQI
21st Jul 2026586 PMAQI
21st Jul 2026627 PMAQI
21st Jul 2026568 PMAQI
21st Jul 2026639 PMAQI
21st Jul 20265810 PMAQI
21st Jul 20265611 PMAQI
22nd Jul 20265412 AMAQI
22nd Jul 2026541 AMAQI
22nd Jul 2026552 AMAQI
22nd Jul 2026533 AMAQI
22nd Jul 2026544 AMAQI
22nd Jul 2026585 AMAQI
31°C24/39°C
22nd Jul 2026576 AMAQI
22nd Jul 2026547 AMAQI
22nd Jul 2026558 AMAQI
22nd Jul 2026489 AMAQI
22nd Jul 20264610 AMAQI
22nd Jul 20265411 AMAQI
22nd Jul 20265712 PMAQI
22nd Jul 2026601 PMAQI
22nd Jul 2026572 PMAQI
22nd Jul 2026573 PMAQI
22nd Jul 2026564 PMAQI
22nd Jul 2026555 PMAQI
22nd Jul 2026626 PMAQI
22nd Jul 2026707 PMAQI
22nd Jul 2026708 PMAQI
22nd Jul 2026699 PMAQI
22nd Jul 20266210 PMAQI
22nd Jul 20266011 PMAQI
23rd Jul 20264912 AMAQI
23rd Jul 2026501 AMAQI
23rd Jul 2026552 AMAQI
23rd Jul 2026573 AMAQI
23rd Jul 2026584 AMAQI
23rd Jul 2026545 AMAQI
33°C25/41°C
23rd Jul 2026566 AMAQI
23rd Jul 2026577 AMAQI
23rd Jul 2026568 AMAQI
23rd Jul 2026549 AMAQI
23rd Jul 20265410 AMAQI
23rd Jul 20265611 AMAQI
23rd Jul 20265312 PMAQI
23rd Jul 2026511 PMAQI
23rd Jul 2026532 PMAQI
23rd Jul 2026533 PMAQI
23rd Jul 2026514 PMAQI
23rd Jul 2026445 PMAQI
23rd Jul 2026486 PMAQI
23rd Jul 2026527 PMAQI
23rd Jul 2026488 PMAQI
23rd Jul 2026489 PMAQI
23rd Jul 20264410 PMAQI
23rd Jul 20264211 PMAQI
24th Jul 20265012 AMAQI
24th Jul 2026271 AMAQI
24th Jul 2026462 AMAQI
24th Jul 2026513 AMAQI
24th Jul 2026504 AMAQI
24th Jul 2026535 AMAQI
32°C26/39°C
24th Jul 2026446 AMAQI
24th Jul 2026387 AMAQI
24th Jul 2026468 AMAQI
24th Jul 2026449 AMAQI
24th Jul 20265110 AMAQI
24th Jul 20265411 AMAQI
24th Jul 20265212 PMAQI
24th Jul 2026541 PMAQI
24th Jul 2026592 PMAQI
24th Jul 2026553 PMAQI
24th Jul 2026564 PMAQI
24th Jul 2026575 PMAQI
24th Jul 2026586 PMAQI
24th Jul 2026607 PMAQI
24th Jul 2026588 PMAQI
24th Jul 2026569 PMAQI
24th Jul 20265310 PMAQI
24th Jul 20265411 PMAQI
25th Jul 20266212 AMAQI
25th Jul 2026631 AMAQI
25th Jul 2026632 AMAQI
25th Jul 2026583 AMAQI
25th Jul 2026604 AMAQI
25th Jul 2026595 AMAQI
30°C25/36°C
25th Jul 2026606 AMAQI
25th Jul 2026587 AMAQI
25th Jul 2026588 AMAQI
25th Jul 2026609 AMAQI
25th Jul 20265810 AMAQI
25th Jul 20266411 AMAQI
25th Jul 20266212 PMAQI
25th Jul 2026681 PMAQI
25th Jul 2026652 PMAQI
25th Jul 2026693 PMAQI
25th Jul 2026684 PMAQI
25th Jul 2026695 PMAQI
25th Jul 2026696 PMAQI
25th Jul 2026607 PMAQI
25th Jul 2026588 PMAQI
25th Jul 2026609 PMAQI
25th Jul 20266210 PMAQI
25th Jul 20265811 PMAQI
26th Jul 20265412 AMAQI
26th Jul 2026571 AMAQI
26th Jul 2026562 AMAQI
26th Jul 2026603 AMAQI
26th Jul 2026564 AMAQI
26th Jul 2026565 AMAQI
30°C25/37°C
26th Jul 2026536 AMAQI
26th Jul 2026547 AMAQI
26th Jul 2026508 AMAQI
26th Jul 2026449 AMAQI
26th Jul 20265110 AMAQI
26th Jul 20265111 AMAQI
26th Jul 20264412 PMAQI
26th Jul 2026511 PMAQI
26th Jul 2026532 PMAQI
26th Jul 2026533 PMAQI
26th Jul 2026464 PMAQI
26th Jul 2026485 PMAQI
26th Jul 2026486 PMAQI
26th Jul 2026447 PMAQI
26th Jul 2026448 PMAQI
26th Jul 2026449 PMAQI
26th Jul 20263410 PMAQI
26th Jul 20262511 PMAQI
27th Jul 20262712 AMAQI
27th Jul 2026321 AMAQI
27th Jul 2026362 AMAQI
27th Jul 2026363 AMAQI
27th Jul 2026324 AMAQI
27th Jul 2026405 AMAQI
30°C24/37°C
27th Jul 2026386 AMAQI
27th Jul 2026327 AMAQI
27th Jul 2026368 AMAQI
27th Jul 2026449 AMAQI
27th Jul 20264210 AMAQI
27th Jul 20264411 AMAQI
27th Jul 20265212 PMAQI
27th Jul 2026421 PMAQI
27th Jul 2026492 PMAQI
27th Jul 2026423 PMAQI
27th Jul 2026484 PMAQI
27th Jul 2026405 PMAQI
27th Jul 2026506 PMAQI
27th Jul 2026507 PMAQI
27th Jul 2026448 PMAQI
27th Jul 2026469 PMAQI
27th Jul 20264510 PMAQI
27th Jul 20263211 PMAQI
28th Jul 20265112 AMAQI
28th Jul 2026461 AMAQI
28th Jul 2026462 AMAQI
28th Jul 2026443 AMAQI
28th Jul 2026464 AMAQI
28th Jul 2026465 AMAQI
31°C24/38°C
28th Jul 2026486 AMAQI
28th Jul 2026487 AMAQI
28th Jul 2026428 AMAQI
28th Jul 2026409 AMAQI
28th Jul 20264010 AMAQI
28th Jul 20264911 AMAQI
28th Jul 20265112 PMAQI
28th Jul 2026531 PMAQI
28th Jul 2026522 PMAQI
28th Jul 2026513 PMAQI
28th Jul 2026484 PMAQI
28th Jul 2026505 PMAQI
28th Jul 2026426 PMAQI
28th Jul 2026487 PMAQI
28th Jul 2026428 PMAQI
28th Jul 2026489 PMAQI
28th Jul 20265010 PMAQI
28th Jul 20264811 PMAQI
29th Jul 20265912 AMAQI
29th Jul 2026591 AMAQI
29th Jul 2026582 AMAQI
29th Jul 2026553 AMAQI
29th Jul 2026574 AMAQI
29th Jul 2026525 AMAQI
31°C25/39°C
29th Jul 2026486 AMAQI
29th Jul 2026467 AMAQI
29th Jul 2026488 AMAQI
29th Jul 2026519 AMAQI
29th Jul 20265110 AMAQI
29th Jul 20264611 AMAQI
29th Jul 20264912 PMAQI
29th Jul 2026421 PMAQI
29th Jul 2026462 PMAQI
29th Jul 2026493 PMAQI
29th Jul 2026514 PMAQI
29th Jul 2026525 PMAQI
29th Jul 2026526 PMAQI
29th Jul 2026547 PMAQI
29th Jul 2026548 PMAQI
29th Jul 2026529 PMAQI
29th Jul 20265210 PMAQI
29th Jul 20265111 PMAQI
30th Jul 20265212 AMAQI
30th Jul 2026531 AMAQI
30th Jul 2026482 AMAQI
30th Jul 2026503 AMAQI
30th Jul 2026494 AMAQI
30th Jul 2026505 AMAQI
31°C26/39°C
30th Jul 2026506 AMAQI
30th Jul 2026527 AMAQI
30th Jul 2026538 AMAQI
30th Jul 2026519 AMAQI
30th Jul 20265310 AMAQI
30th Jul 20265511 AMAQI
30th Jul 20265512 PMAQI
30th Jul 2026551 PMAQI
30th Jul 2026562 PMAQI
30th Jul 2026543 PMAQI
30th Jul 2026534 PMAQI
30th Jul 2026525 PMAQI
30th Jul 2026526 PMAQI
30th Jul 2026507 PMAQI
30th Jul 2026518 PMAQI
30th Jul 2026489 PMAQI
30th Jul 20264810 PMAQI
30th Jul 20264811 PMAQI
31st Jul 20265212 AMAQI
31st Jul 2026511 AMAQI
31st Jul 2026502 AMAQI
31st Jul 2026463 AMAQI
31st Jul 2026534 AMAQI
31st Jul 2026525 AMAQI
32°C26/40°C
31st Jul 2026516 AMAQI
31st Jul 2026487 AMAQI
31st Jul 2026528 AMAQI
31st Jul 2026489 AMAQI
31st Jul 20264610 AMAQI
31st Jul 20265111 AMAQI
31st Jul 20265312 PMAQI
31st Jul 2026531 PMAQI
31st Jul 2026522 PMAQI
31st Jul 2026523 PMAQI
31st Jul 2026514 PMAQI
31st Jul 2026525 PMAQI
31st Jul 2026496 PMAQI
31st Jul 2026517 PMAQI
31st Jul 2026518 PMAQI
31st Jul 2026509 PMAQI
31st Jul 20264810 PMAQI
31st Jul 20264811 PMAQI
1st Aug 20264612 AMAQI
1st Aug 2026441 AMAQI
1st Aug 2026422 AMAQI
1st Aug 2026303 AMAQI
1st Aug 2026324 AMAQI
1st Aug 2026465 AMAQI
31°C25/39°C
1st Aug 2026326 AMAQI
1st Aug 2026367 AMAQI
1st Aug 2026328 AMAQI
1st Aug 2026449 AMAQI
1st Aug 20264010 AMAQI
1st Aug 20265011 AMAQI
1st Aug 20264612 PMAQI
1st Aug 2026491 PMAQI
1st Aug 2026462 PMAQI
1st Aug 2026493 PMAQI
1st Aug 2026464 PMAQI
1st Aug 2026465 PMAQI
1st Aug 2026486 PMAQI
1st Aug 2026447 PMAQI
1st Aug 2026428 PMAQI
1st Aug 2026449 PMAQI
1st Aug 20264610 PMAQI
1st Aug 20265011 PMAQI
2nd Aug 20265112 AMAQI
2nd Aug 2026491 AMAQI
2nd Aug 2026492 AMAQI
2nd Aug 2026483 AMAQI
2nd Aug 2026484 AMAQI
2nd Aug 2026485 AMAQI
31°C25/39°C
2nd Aug 2026466 AMAQI
2nd Aug 2026487 AMAQI
2nd Aug 2026488 AMAQI
2nd Aug 2026469 AMAQI
2nd Aug 20264810 AMAQI
2nd Aug 20265011 AMAQI
2nd Aug 20265212 PMAQI
2nd Aug 2026511 PMAQI
2nd Aug 2026462 PMAQI
2nd Aug 2026513 PMAQI
2nd Aug 2026534 PMAQI
2nd Aug 2026535 PMAQI
2nd Aug 2026466 PMAQI
2nd Aug 2026507 PMAQI
2nd Aug 2026468 PMAQI
2nd Aug 2026509 PMAQI
2nd Aug 20264810 PMAQI
2nd Aug 20264611 PMAQI
3rd Aug 20264812 AMAQI
3rd Aug 2026501 AMAQI
3rd Aug 2026462 AMAQI
3rd Aug 2026463 AMAQI
3rd Aug 2026514 AMAQI
3rd Aug 2026485 AMAQI
31°C24/40°C
3rd Aug 2026526 AMAQI
3rd Aug 2026537 AMAQI
3rd Aug 2026538 AMAQI
3rd Aug 2026559 AMAQI
3rd Aug 20265210 AMAQI
3rd Aug 20265311 AMAQI
3rd Aug 20265312 PMAQI
3rd Aug 2026561 PMAQI
3rd Aug 2026532 PMAQI
3rd Aug 2026543 PMAQI
3rd Aug 2026544 PMAQI
3rd Aug 2026525 PMAQI
3rd Aug 2026536 PMAQI
3rd Aug 2026507 PMAQI
3rd Aug 2026488 PMAQI
3rd Aug 2026469 PMAQI
3rd Aug 20265410 PMAQI
3rd Aug 20264911 PMAQI
4th Aug 20265012 AMAQI
4th Aug 2026521 AMAQI
4th Aug 2026542 AMAQI
4th Aug 2026593 AMAQI
4th Aug 2026634 AMAQI
4th Aug 2026625 AMAQI
31°C23/40°C
4th Aug 2026656 AMAQI
4th Aug 2026667 AMAQI
4th Aug 2026678 AMAQI
4th Aug 2026669 AMAQI
4th Aug 20266710 AMAQI
4th Aug 20267511 AMAQI
4th Aug 20267612 PMAQI
4th Aug 2026781 PMAQI
4th Aug 2026792 PMAQI
4th Aug 2026833 PMAQI
4th Aug 2026764 PMAQI
4th Aug 2026715 PMAQI
4th Aug 2026756 PMAQI
4th Aug 2026717 PMAQI
4th Aug 2026688 PMAQI
4th Aug 2026729 PMAQI
4th Aug 20266710 PMAQI
4th Aug 20266411 PMAQI
5th Aug 20266212 AMAQI
5th Aug 2026621 AMAQI
5th Aug 2026602 AMAQI
5th Aug 2026633 AMAQI
5th Aug 2026664 AMAQI
5th Aug 2026655 AMAQI
32°C26/40°C
5th Aug 2026606 AMAQI
5th Aug 2026607 AMAQI
5th Aug 2026608 AMAQI
5th Aug 2026649 AMAQI
5th Aug 20266510 AMAQI
5th Aug 20266511 AMAQI
5th Aug 20266612 PMAQI
5th Aug 2026651 PMAQI
5th Aug 2026632 PMAQI
5th Aug 2026643 PMAQI
5th Aug 2026624 PMAQI
5th Aug 2026605 PMAQI
5th Aug 2026596 PMAQI
5th Aug 2026567 PMAQI
5th Aug 2026548 PMAQI
5th Aug 2026549 PMAQI
5th Aug 20265310 PMAQI
5th Aug 20265511 PMAQI
6th Aug 20265512 AMAQI
6th Aug 2026531 AMAQI
6th Aug 2026522 AMAQI
6th Aug 2026523 AMAQI
6th Aug 2026514 AMAQI
6th Aug 2026535 AMAQI
31°C25/39°C
6th Aug 2026486 AMAQI
6th Aug 2026517 AMAQI
6th Aug 2026508 AMAQI
6th Aug 2026519 AMAQI
6th Aug 20264810 AMAQI
6th Aug 20264611 AMAQI
6th Aug 20265112 PMAQI
6th Aug 2026521 PMAQI
6th Aug 2026522 PMAQI
6th Aug 2026523 PMAQI
6th Aug 2026574 PMAQI
6th Aug 2026525 PMAQI
6th Aug 2026506 PMAQI
6th Aug 2026537 PMAQI
6th Aug 2026538 PMAQI
6th Aug 2026499 PMAQI
6th Aug 20264510 PMAQI
6th Aug 20264511 PMAQI
7th Aug 20264212 AMAQI
7th Aug 2026501 AMAQI
7th Aug 2026462 AMAQI
7th Aug 2026463 AMAQI
7th Aug 2026544 AMAQI
7th Aug 2026425 AMAQI
31°C26/40°C
7th Aug 2026466 AMAQI
7th Aug 2026427 AMAQI
7th Aug 2026428 AMAQI
7th Aug 2026429 AMAQI
7th Aug 20264210 AMAQI
7th Aug 20264211 AMAQI
7th Aug 20265112 PMAQI
7th Aug 2026511 PMAQI
7th Aug 2026422 PMAQI
7th Aug 2026483 PMAQI
7th Aug 2026444 PMAQI
7th Aug 2026445 PMAQI
7th Aug 2026466 PMAQI
7th Aug 2026447 PMAQI
7th Aug 2026408 PMAQI
7th Aug 2026519 PMAQI
7th Aug 20265110 PMAQI
7th Aug 20265211 PMAQI
8th Aug 20265212 AMAQI
8th Aug 2026491 AMAQI
8th Aug 2026422 AMAQI
8th Aug 2026463 AMAQI
8th Aug 2026534 AMAQI
8th Aug 2026485 AMAQI
32°C26/39°C
8th Aug 2026506 AMAQI
6 AM8th Aug 2026487 AMAQI
8th Aug 2026468 AMAQI
8th Aug 2026469 AMAQI
8th Aug 20264810 AMAQI
8th Aug 20264611 AMAQI
8th Aug 20264612 PMAQI
8th Aug 2026531 PMAQI
1 PM8th Aug 2026482 PMAQI
8th Aug 2026513 PMAQI
8th Aug 2026484 PMAQI
8th Aug 2026485 PMAQI
8th Aug 2026526 PMAQI
8th Aug 2026517 PMAQI
8 PM
1 AM
5 AM
31°C23/39°C
Day time
Avg. Highest Time
12 PM - 4 PM
51AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
6 AM - 11 AM
47AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 4 PM (Avg. 51), while the lowest AQI was between 6 AM to 11 AM (Avg. 47).
Night time
Avg. Highest Time
12 AM - 9 PM
47AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
10 PM - 11 PM
46AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 9 PM (Avg. 47), while the lowest AQI was between 10 PM to 11 PM (Avg. 46).
2026 Days Vs Air Quality
San Marcos, Texas, United States
2026
87%
187
13%
29
Total number of days with different AQI categories in last 220 days in 2026 (145 days remaining)
Good
187 DaysModerate
29 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2026, 87% of 220 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
San Marcos, Texas, United States
AQI levels in 2026
AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
65AQI (US)
65AQI (US)
2nd January 2026
25AQI (US)
25AQI (US)
3rd January 2026
28AQI (US)
28AQI (US)
4th January 2026
42AQI (US)
42AQI (US)
5th January 2026
44AQI (US)
44AQI (US)
6th January 2026
47AQI (US)
47AQI (US)
7th January 2026
53AQI (US)
53AQI (US)
8th January 2026
50AQI (US)
50AQI (US)
9th January 2026
58AQI (US)
58AQI (US)
10th January 2026
23AQI (US)
23AQI (US)
11th January 2026
14AQI (US)
14AQI (US)
12th January 2026
34AQI (US)
34AQI (US)
13th January 2026
31AQI (US)
31AQI (US)
14th January 2026
21AQI (US)
21AQI (US)
15th January 2026
22AQI (US)
22AQI (US)
16th January 2026
19AQI (US)
19AQI (US)
17th January 2026
39AQI (US)
39AQI (US)
18th January 2026
28AQI (US)
28AQI (US)
19th January 2026
31AQI (US)
31AQI (US)
20th January 2026
31AQI (US)
31AQI (US)
21st January 2026
33AQI (US)
33AQI (US)
22nd January 2026
52AQI (US)
52AQI (US)
23rd January 2026
44AQI (US)
44AQI (US)
24th January 2026
47AQI (US)
47AQI (US)
25th January 2026
55AQI (US)
55AQI (US)
26th January 2026
48AQI (US)
48AQI (US)
27th January 2026
36AQI (US)
36AQI (US)
28th January 2026
51AQI (US)
51AQI (US)
29th January 2026
52AQI (US)
52AQI (US)
30th January 2026
53AQI (US)
53AQI (US)
31st January 2026
37AQI (US)
37AQI (US)
1st February 2026
46AQI (US)
46AQI (US)
2nd February 2026
45AQI (US)
45AQI (US)
3rd February 2026
43AQI (US)
43AQI (US)
4th February 2026
33AQI (US)
33AQI (US)
5th February 2026
42AQI (US)
42AQI (US)
6th February 2026
42AQI (US)
42AQI (US)
7th February 2026
42AQI (US)
42AQI (US)
8th February 2026
38AQI (US)
38AQI (US)
9th February 2026
43AQI (US)
43AQI (US)
10th February 2026
36AQI (US)
36AQI (US)
11th February 2026
28AQI (US)
28AQI (US)
12th February 2026
40AQI (US)
40AQI (US)
13th February 2026
40AQI (US)
40AQI (US)
14th February 2026
38AQI (US)
38AQI (US)
15th February 2026
38AQI (US)
38AQI (US)
16th February 2026
40AQI (US)
40AQI (US)
17th February 2026
43AQI (US)
43AQI (US)
18th February 2026
45AQI (US)
45AQI (US)
19th February 2026
55AQI (US)
55AQI (US)
20th February 2026
47AQI (US)
47AQI (US)
21st February 2026
42AQI (US)
42AQI (US)
22nd February 2026
28AQI (US)
28AQI (US)
23rd February 2026
38AQI (US)
38AQI (US)
24th February 2026
43AQI (US)
43AQI (US)
25th February 2026
40AQI (US)
40AQI (US)
26th February 2026
46AQI (US)
46AQI (US)
27th February 2026
37AQI (US)
37AQI (US)
28th February 2026
41AQI (US)
41AQI (US)
1st March 2026
44AQI (US)
44AQI (US)
2nd March 2026
49AQI (US)
49AQI (US)
3rd March 2026
35AQI (US)
35AQI (US)
4th March 2026
38AQI (US)
38AQI (US)
5th March 2026
29AQI (US)
29AQI (US)
6th March 2026
30AQI (US)
30AQI (US)
7th March 2026
35AQI (US)
35AQI (US)
8th March 2026
35AQI (US)
35AQI (US)
9th March 2026
30AQI (US)
30AQI (US)
10th March 2026
33AQI (US)
33AQI (US)
11th March 2026
30AQI (US)
30AQI (US)
12th March 2026
30AQI (US)
30AQI (US)
13th March 2026
32AQI (US)
32AQI (US)
14th March 2026
25AQI (US)
25AQI (US)
15th March 2026
43AQI (US)
43AQI (US)
16th March 2026
40AQI (US)
40AQI (US)
17th March 2026
28AQI (US)
28AQI (US)
18th March 2026
26AQI (US)
26AQI (US)
19th March 2026
34AQI (US)
34AQI (US)
20th March 2026
40AQI (US)
40AQI (US)
21st March 2026
31AQI (US)
31AQI (US)
22nd March 2026
26AQI (US)
26AQI (US)
23rd March 2026
32AQI (US)
32AQI (US)
24th March 2026
26AQI (US)
26AQI (US)
25th March 2026
31AQI (US)
31AQI (US)
26th March 2026
29AQI (US)
29AQI (US)
27th March 2026
26AQI (US)
26AQI (US)
28th March 2026
20AQI (US)
20AQI (US)
29th March 2026
28AQI (US)
28AQI (US)
30th March 2026
39AQI (US)
39AQI (US)
31st March 2026
31AQI (US)
31AQI (US)
1st April 2026
35AQI (US)
35AQI (US)
2nd April 2026
25AQI (US)
25AQI (US)
3rd April 2026
24AQI (US)
24AQI (US)
4th April 2026
30AQI (US)
30AQI (US)
5th April 2026
31AQI (US)
31AQI (US)
6th April 2026
26AQI (US)
26AQI (US)
7th April 2026
24AQI (US)
24AQI (US)
8th April 2026
33AQI (US)
33AQI (US)
9th April 2026
24AQI (US)
24AQI (US)
10th April 2026
31AQI (US)
31AQI (US)
11th April 2026
29AQI (US)
29AQI (US)
12th April 2026
24AQI (US)
24AQI (US)
13th April 2026
27AQI (US)
27AQI (US)
14th April 2026
30AQI (US)
30AQI (US)
15th April 2026
36AQI (US)
36AQI (US)
16th April 2026
32AQI (US)
32AQI (US)
17th April 2026
18th April 2026
31AQI (US)
31AQI (US)
19th April 2026
24AQI (US)
24AQI (US)
20th April 2026
16AQI (US)
16AQI (US)
21st April 2026
27AQI (US)
27AQI (US)
22nd April 2026
23rd April 2026
27AQI (US)
27AQI (US)
24th April 2026
32AQI (US)
32AQI (US)
25th April 2026
42AQI (US)
42AQI (US)
26th April 2026
40AQI (US)
40AQI (US)
27th April 2026
46AQI (US)
46AQI (US)
28th April 2026
52AQI (US)
52AQI (US)
29th April 2026
38AQI (US)
38AQI (US)
30th April 2026
23AQI (US)
23AQI (US)
1st May 2026
26AQI (US)
26AQI (US)
2nd May 2026
22AQI (US)
22AQI (US)
3rd May 2026
24AQI (US)
24AQI (US)
4th May 2026
34AQI (US)
34AQI (US)
5th May 2026
37AQI (US)
37AQI (US)
6th May 2026
38AQI (US)
38AQI (US)
7th May 2026
22AQI (US)
22AQI (US)
8th May 2026
37AQI (US)
37AQI (US)
9th May 2026
10th May 2026
31AQI (US)
31AQI (US)
11th May 2026
32AQI (US)
32AQI (US)
12th May 2026
32AQI (US)
32AQI (US)
13th May 2026
33AQI (US)
33AQI (US)
14th May 2026
30AQI (US)
30AQI (US)
15th May 2026
42AQI (US)
42AQI (US)
16th May 2026
48AQI (US)
48AQI (US)
17th May 2026
59AQI (US)
59AQI (US)
18th May 2026
59AQI (US)
59AQI (US)
19th May 2026
58AQI (US)
58AQI (US)
20th May 2026
42AQI (US)
42AQI (US)
21st May 2026
44AQI (US)
44AQI (US)
22nd May 2026
50AQI (US)
50AQI (US)
23rd May 2026
51AQI (US)
51AQI (US)
24th May 2026
44AQI (US)
44AQI (US)
25th May 2026
46AQI (US)
46AQI (US)
26th May 2026
28AQI (US)
28AQI (US)
27th May 2026
18AQI (US)
18AQI (US)
28th May 2026
21AQI (US)
21AQI (US)
29th May 2026
26AQI (US)
26AQI (US)
30th May 2026
18AQI (US)
18AQI (US)
31st May 2026
19AQI (US)
19AQI (US)
1st June 2026
31AQI (US)
31AQI (US)
2nd June 2026
32AQI (US)
32AQI (US)
3rd June 2026
33AQI (US)
33AQI (US)
4th June 2026
27AQI (US)
27AQI (US)
5th June 2026
20AQI (US)
20AQI (US)
6th June 2026
19AQI (US)
19AQI (US)
7th June 2026
39AQI (US)
39AQI (US)
8th June 2026
37AQI (US)
37AQI (US)
9th June 2026
31AQI (US)
31AQI (US)
10th June 2026
21AQI (US)
21AQI (US)
11th June 2026
21AQI (US)
21AQI (US)
12th June 2026
20AQI (US)
20AQI (US)
13th June 2026
33AQI (US)
33AQI (US)
14th June 2026
27AQI (US)
27AQI (US)
15th June 2026
23AQI (US)
23AQI (US)
16th June 2026
18AQI (US)
18AQI (US)
17th June 2026
19AQI (US)
19AQI (US)
18th June 2026
33AQI (US)
33AQI (US)
19th June 2026
30AQI (US)
30AQI (US)
20th June 2026
23AQI (US)
23AQI (US)
21st June 2026
42AQI (US)
42AQI (US)
22nd June 2026
43AQI (US)
43AQI (US)
23rd June 2026
40AQI (US)
40AQI (US)
24th June 2026
50AQI (US)
50AQI (US)
25th June 2026
49AQI (US)
49AQI (US)
26th June 2026
46AQI (US)
46AQI (US)
27th June 2026
48AQI (US)
48AQI (US)
28th June 2026
36AQI (US)
36AQI (US)
29th June 2026
58AQI (US)
58AQI (US)
30th June 2026
48AQI (US)
48AQI (US)
1st July 2026
38AQI (US)
38AQI (US)
2nd July 2026
42AQI (US)
42AQI (US)
3rd July 2026
27AQI (US)
27AQI (US)
4th July 2026
25AQI (US)
25AQI (US)
5th July 2026
28AQI (US)
28AQI (US)
6th July 2026
39AQI (US)
39AQI (US)
7th July 2026
36AQI (US)
36AQI (US)
8th July 2026
31AQI (US)
31AQI (US)
9th July 2026
32AQI (US)
32AQI (US)
10th July 2026
29AQI (US)
29AQI (US)
11th July 2026
25AQI (US)
25AQI (US)
12th July 2026
32AQI (US)
32AQI (US)
13th July 2026
24AQI (US)
24AQI (US)
14th July 2026
41AQI (US)
41AQI (US)
15th July 2026
35AQI (US)
35AQI (US)
16th July 2026
40AQI (US)
40AQI (US)
17th July 2026
48AQI (US)
48AQI (US)
18th July 2026
60AQI (US)
60AQI (US)
19th July 2026
61AQI (US)
61AQI (US)
20th July 2026
63AQI (US)
63AQI (US)
21st July 2026
57AQI (US)
57AQI (US)
22nd July 2026
57AQI (US)
57AQI (US)
23rd July 2026
52AQI (US)
52AQI (US)
24th July 2026
51AQI (US)
51AQI (US)
25th July 2026
62AQI (US)
62AQI (US)
26th July 2026
49AQI (US)
49AQI (US)
27th July 2026
41AQI (US)
41AQI (US)
28th July 2026
47AQI (US)
47AQI (US)
29th July 2026
51AQI (US)
51AQI (US)
30th July 2026
52AQI (US)
52AQI (US)
31st July 2026
50AQI (US)
50AQI (US)
1st August 2026
43AQI (US)
43AQI (US)
2nd August 2026
49AQI (US)
49AQI (US)
3rd August 2026
51AQI (US)
51AQI (US)
4th August 2026
68AQI (US)
68AQI (US)
5th August 2026
61AQI (US)
61AQI (US)
6th August 2026
51AQI (US)
51AQI (US)
7th August 2026
46AQI (US)
46AQI (US)
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
39AQI (US)
41AQI (US)
32AQI (US)
31AQI (US)
36AQI (US)
33AQI (US)
43AQI (US)
53AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202637AQI (US)
23
8
27
1
31
27
1
26
4
29
1
21
10
3
4
187
29
Highest AQI (US) recorded in
August53AQI (US)
Lowest AQI (US) recorded in
April31AQI (US)
202542AQI (US)
4
2
20
10
19
12
22
8
23
8
30
1
29
1
19
12
26
4
24
7
216
65
Highest AQI (US) recorded in
October48AQI (US)
Lowest AQI (US) recorded in
September37AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Most Polluted Year Recorded
2025(Avg.)
42AQI (US)Least Polluted Year Recorded
2026(Avg.)
37AQI (US)San Marcos's annual 2026 AQI (US) (37) shows an average percentage change of -11.9% (improved AQI (US)) compared to previous years: 2025 (42).
