Hokujo, Omachi, Nagano, Japan 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
Hokujo, Omachi, Nagano, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
4th Aug 2025
51AQILowest AQI recorded on
24th Aug 2023
14AQISame Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 51 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Hokujo, Omachi, Nagano, Japan
AQI
Day
Night
.
4 AM4th Aug 2025
7 PM
3 AM5th Aug 2025
Day time
Avg. Highest Time
4PM4th Aug
78AQI
Avg. Lowest Time
7AM4th Aug
45AQI
Night time
Avg. Highest Time
7PM4th Aug
62AQI
Avg. Lowest Time
3AM5th Aug
43AQI
In the last 24 hours,
Hokujo's AQI reached its highest point of 78 at 4 PM during the Day, while the lowest point, 43, was recorded at 3 AM during the Night between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Hokujo, Omachi, Nagano, Japan
JulAug
06th - 07th07th - 08th08th - 09th09th - 10th10th - 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
Day
Night
6th Jul 2025554 AMAQI
6th Jul 2025555 AMAQI
6th Jul 2025546 AMAQI
6th Jul 2025557 AMAQI
6th Jul 2025568 AMAQI
6th Jul 2025559 AMAQI
6th Jul 20255910 AMAQI
6th Jul 20256211 AMAQI
6th Jul 20255712 PMAQI
6th Jul 2025541 PMAQI
6th Jul 2025532 PMAQI
6th Jul 2025533 PMAQI
6th Jul 2025544 PMAQI
6th Jul 2025525 PMAQI
6th Jul 2025526 PMAQI
6th Jul 2025557 PMAQI
6th Jul 2025538 PMAQI
6th Jul 2025569 PMAQI
6th Jul 20255810 PMAQI
6th Jul 20255911 PMAQI
7th Jul 20255812 AMAQI
7th Jul 2025561 AMAQI
7th Jul 2025552 AMAQI
7th Jul 2025563 AMAQI
21°C14/30°C
7th Jul 2025554 AMAQI
7th Jul 2025555 AMAQI
7th Jul 2025556 AMAQI
7th Jul 2025577 AMAQI
7th Jul 2025568 AMAQI
7th Jul 2025579 AMAQI
7th Jul 20255710 AMAQI
7th Jul 20255911 AMAQI
7th Jul 20256012 PMAQI
7th Jul 2025591 PMAQI
7th Jul 2025572 PMAQI
7th Jul 2025613 PMAQI
7th Jul 2025614 PMAQI
7th Jul 2025615 PMAQI
7th Jul 2025616 PMAQI
7th Jul 2025627 PMAQI
7th Jul 2025658 PMAQI
7th Jul 2025649 PMAQI
7th Jul 20256410 PMAQI
7th Jul 20256211 PMAQI
8th Jul 20256412 AMAQI
8th Jul 2025581 AMAQI
8th Jul 2025562 AMAQI
8th Jul 2025553 AMAQI
21°C15/28°C
8th Jul 2025584 AMAQI
8th Jul 2025565 AMAQI
8th Jul 2025566 AMAQI
8th Jul 2025567 AMAQI
8th Jul 2025568 AMAQI
8th Jul 2025599 AMAQI
8th Jul 20256410 AMAQI
8th Jul 20256611 AMAQI
8th Jul 20256912 PMAQI
8th Jul 2025761 PMAQI
8th Jul 2025692 PMAQI
8th Jul 2025643 PMAQI
8th Jul 2025644 PMAQI
8th Jul 2025675 PMAQI
8th Jul 2025666 PMAQI
8th Jul 2025637 PMAQI
8th Jul 2025678 PMAQI
8th Jul 2025619 PMAQI
8th Jul 20256010 PMAQI
8th Jul 20256211 PMAQI
9th Jul 20256012 AMAQI
9th Jul 2025581 AMAQI
9th Jul 2025582 AMAQI
9th Jul 2025583 AMAQI
22°C16/29°C
9th Jul 2025604 AMAQI
9th Jul 2025625 AMAQI
9th Jul 2025616 AMAQI
9th Jul 2025617 AMAQI
9th Jul 2025618 AMAQI
9th Jul 2025689 AMAQI
9th Jul 20257610 AMAQI
9th Jul 20257411 AMAQI
9th Jul 20257212 PMAQI
9th Jul 2025691 PMAQI
9th Jul 2025672 PMAQI
9th Jul 2025673 PMAQI
9th Jul 2025724 PMAQI
9th Jul 2025725 PMAQI
9th Jul 2025686 PMAQI
9th Jul 2025657 PMAQI
9th Jul 2025658 PMAQI
9th Jul 2025619 PMAQI
9th Jul 20256010 PMAQI
9th Jul 20256011 PMAQI
10th Jul 20256012 AMAQI
10th Jul 2025601 AMAQI
10th Jul 2025592 AMAQI
10th Jul 2025583 AMAQI
21°C16/27°C
10th Jul 2025614 AMAQI
10th Jul 2025615 AMAQI
10th Jul 2025626 AMAQI
10th Jul 2025617 AMAQI
10th Jul 2025618 AMAQI
10th Jul 2025569 AMAQI
10th Jul 20255910 AMAQI
10th Jul 20256411 AMAQI
10th Jul 20256612 PMAQI
10th Jul 2025661 PMAQI
10th Jul 2025642 PMAQI
10th Jul 2025643 PMAQI
10th Jul 2025584 PMAQI
10th Jul 2025485 PMAQI
10th Jul 2025466 PMAQI
10th Jul 2025477 PMAQI
10th Jul 2025528 PMAQI
10th Jul 2025559 PMAQI
10th Jul 20255410 PMAQI
10th Jul 20255311 PMAQI
11th Jul 20255412 AMAQI
11th Jul 2025571 AMAQI
11th Jul 2025612 AMAQI
11th Jul 2025603 AMAQI
20°C14/27°C
11th Jul 2025604 AMAQI
11th Jul 2025605 AMAQI
11th Jul 2025606 AMAQI
11th Jul 2025607 AMAQI
11th Jul 2025608 AMAQI
11th Jul 2025359 AMAQI
11th Jul 20253210 AMAQI
11th Jul 20253211 AMAQI
11th Jul 20253512 PMAQI
11th Jul 2025341 PMAQI
11th Jul 2025382 PMAQI
11th Jul 2025403 PMAQI
11th Jul 2025424 PMAQI
11th Jul 2025405 PMAQI
11th Jul 2025416 PMAQI
11th Jul 2025417 PMAQI
11th Jul 2025448 PMAQI
11th Jul 2025529 PMAQI
11th Jul 20255210 PMAQI
11th Jul 20255311 PMAQI
12th Jul 20255212 AMAQI
12th Jul 2025541 AMAQI
12th Jul 2025562 AMAQI
12th Jul 2025573 AMAQI
19°C13/26°C
12th Jul 2025584 AMAQI
12th Jul 2025555 AMAQI
12th Jul 2025546 AMAQI
12th Jul 2025567 AMAQI
12th Jul 2025558 AMAQI
12th Jul 2025329 AMAQI
12th Jul 20252510 AMAQI
12th Jul 20252811 AMAQI
12th Jul 20253212 PMAQI
12th Jul 2025371 PMAQI
12th Jul 2025362 PMAQI
12th Jul 2025403 PMAQI
12th Jul 2025394 PMAQI
12th Jul 2025415 PMAQI
12th Jul 2025406 PMAQI
12th Jul 2025467 PMAQI
12th Jul 2025478 PMAQI
12th Jul 2025529 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025541 AMAQI
13th Jul 2025552 AMAQI
13th Jul 2025553 AMAQI
20°C13/27°C
13th Jul 2025554 AMAQI
13th Jul 2025545 AMAQI
13th Jul 2025536 AMAQI
13th Jul 2025537 AMAQI
13th Jul 2025538 AMAQI
13th Jul 2025419 AMAQI
13th Jul 20253110 AMAQI
13th Jul 20253111 AMAQI
13th Jul 20253612 PMAQI
13th Jul 2025401 PMAQI
13th Jul 2025422 PMAQI
13th Jul 2025383 PMAQI
13th Jul 2025454 PMAQI
13th Jul 2025455 PMAQI
13th Jul 2025446 PMAQI
13th Jul 2025467 PMAQI
13th Jul 2025498 PMAQI
13th Jul 2025539 PMAQI
13th Jul 20255210 PMAQI
13th Jul 20255211 PMAQI
14th Jul 20255212 AMAQI
14th Jul 2025531 AMAQI
14th Jul 2025532 AMAQI
14th Jul 2025533 AMAQI
22°C16/29°C
14th Jul 2025524 AMAQI
14th Jul 2025525 AMAQI
14th Jul 2025526 AMAQI
14th Jul 2025527 AMAQI
14th Jul 2025528 AMAQI
14th Jul 2025429 AMAQI
14th Jul 20254210 AMAQI
14th Jul 20253611 AMAQI
14th Jul 20253212 PMAQI
14th Jul 2025381 PMAQI
14th Jul 2025342 PMAQI
14th Jul 2025383 PMAQI
14th Jul 2025424 PMAQI
14th Jul 2025385 PMAQI
14th Jul 2025346 PMAQI
14th Jul 2025297 PMAQI
14th Jul 2025318 PMAQI
14th Jul 2025469 PMAQI
14th Jul 20254610 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20254812 AMAQI
15th Jul 2025491 AMAQI
15th Jul 2025522 AMAQI
15th Jul 2025523 AMAQI
22°C18/28°C
15th Jul 2025524 AMAQI
15th Jul 2025525 AMAQI
15th Jul 2025526 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025508 AMAQI
15th Jul 2025249 AMAQI
15th Jul 20251310 AMAQI
15th Jul 20252011 AMAQI
15th Jul 20251812 PMAQI
15th Jul 2025251 PMAQI
15th Jul 2025262 PMAQI
15th Jul 2025263 PMAQI
15th Jul 2025264 PMAQI
15th Jul 2025255 PMAQI
15th Jul 2025246 PMAQI
15th Jul 2025247 PMAQI
15th Jul 2025308 PMAQI
15th Jul 2025449 PMAQI
15th Jul 20254410 PMAQI
15th Jul 20254411 PMAQI
16th Jul 20254612 AMAQI
16th Jul 2025451 AMAQI
16th Jul 2025502 AMAQI
16th Jul 2025523 AMAQI
21°C15/25°C
16th Jul 2025514 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025486 AMAQI
16th Jul 2025477 AMAQI
16th Jul 2025478 AMAQI
16th Jul 2025399 AMAQI
16th Jul 20253810 AMAQI
16th Jul 20254011 AMAQI
16th Jul 20254312 PMAQI
16th Jul 2025491 PMAQI
16th Jul 2025502 PMAQI
16th Jul 2025463 PMAQI
16th Jul 2025414 PMAQI
16th Jul 2025425 PMAQI
16th Jul 2025426 PMAQI
16th Jul 2025427 PMAQI
16th Jul 2025428 PMAQI
16th Jul 2025429 PMAQI
16th Jul 20254110 PMAQI
16th Jul 20254011 PMAQI
17th Jul 20254212 AMAQI
17th Jul 2025431 AMAQI
17th Jul 2025452 AMAQI
17th Jul 2025473 AMAQI
20°C12/28°C
17th Jul 2025474 AMAQI
17th Jul 2025475 AMAQI
17th Jul 2025486 AMAQI
17th Jul 2025477 AMAQI
17th Jul 2025478 AMAQI
17th Jul 2025239 AMAQI
17th Jul 20251610 AMAQI
17th Jul 20251411 AMAQI
17th Jul 20251912 PMAQI
17th Jul 2025261 PMAQI
17th Jul 2025262 PMAQI
17th Jul 2025343 PMAQI
17th Jul 2025284 PMAQI
17th Jul 2025285 PMAQI
17th Jul 2025306 PMAQI
17th Jul 2025317 PMAQI
17th Jul 2025348 PMAQI
17th Jul 2025419 PMAQI
17th Jul 20254410 PMAQI
17th Jul 20254211 PMAQI
18th Jul 20254212 AMAQI
18th Jul 2025441 AMAQI
18th Jul 2025462 AMAQI
18th Jul 2025443 AMAQI
19°C16/21°C
18th Jul 2025444 AMAQI
18th Jul 2025425 AMAQI
18th Jul 2025406 AMAQI
18th Jul 2025437 AMAQI
18th Jul 2025418 AMAQI
18th Jul 2025259 AMAQI
18th Jul 20252010 AMAQI
18th Jul 20252311 AMAQI
18th Jul 20252612 PMAQI
18th Jul 2025301 PMAQI
18th Jul 2025322 PMAQI
18th Jul 2025343 PMAQI
18th Jul 2025354 PMAQI
18th Jul 2025365 PMAQI
18th Jul 2025386 PMAQI
18th Jul 2025367 PMAQI
18th Jul 2025398 PMAQI
18th Jul 2025429 PMAQI
18th Jul 20254210 PMAQI
18th Jul 20254011 PMAQI
19th Jul 20254312 AMAQI
19th Jul 2025431 AMAQI
19th Jul 2025442 AMAQI
19th Jul 2025453 AMAQI
22°C16/29°C
19th Jul 2025444 AMAQI
19th Jul 2025425 AMAQI
19th Jul 2025426 AMAQI
19th Jul 2025417 AMAQI
19th Jul 2025438 AMAQI
19th Jul 2025309 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252211 AMAQI
19th Jul 20253012 PMAQI
19th Jul 2025301 PMAQI
19th Jul 2025302 PMAQI
19th Jul 2025273 PMAQI
19th Jul 2025324 PMAQI
19th Jul 2025365 PMAQI
19th Jul 2025366 PMAQI
19th Jul 2025327 PMAQI
19th Jul 2025368 PMAQI
19th Jul 2025409 PMAQI
19th Jul 20254010 PMAQI
19th Jul 20253811 PMAQI
20th Jul 20253912 AMAQI
20th Jul 2025401 AMAQI
20th Jul 2025422 AMAQI
20th Jul 2025423 AMAQI
21°C14/29°C
20th Jul 2025424 AMAQI
20th Jul 2025415 AMAQI
20th Jul 2025416 AMAQI
20th Jul 2025417 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025369 AMAQI
20th Jul 20253310 AMAQI
20th Jul 20253111 AMAQI
20th Jul 20252812 PMAQI
20th Jul 2025291 PMAQI
20th Jul 2025292 PMAQI
20th Jul 2025353 PMAQI
20th Jul 2025364 PMAQI
20th Jul 2025405 PMAQI
20th Jul 2025416 PMAQI
20th Jul 2025417 PMAQI
20th Jul 2025398 PMAQI
20th Jul 2025439 PMAQI
20th Jul 20254410 PMAQI
20th Jul 20254211 PMAQI
21st Jul 20254212 AMAQI
21st Jul 2025411 AMAQI
21st Jul 2025402 AMAQI
21st Jul 2025413 AMAQI
22°C15/30°C
21st Jul 2025414 AMAQI
21st Jul 2025405 AMAQI
21st Jul 2025406 AMAQI
21st Jul 2025417 AMAQI
21st Jul 2025398 AMAQI
21st Jul 2025429 AMAQI
21st Jul 20254410 AMAQI
21st Jul 20254311 AMAQI
21st Jul 20254212 PMAQI
21st Jul 2025381 PMAQI
21st Jul 2025392 PMAQI
21st Jul 2025383 PMAQI
21st Jul 2025394 PMAQI
21st Jul 2025365 PMAQI
21st Jul 2025346 PMAQI
21st Jul 2025367 PMAQI
21st Jul 2025348 PMAQI
21st Jul 2025379 PMAQI
21st Jul 20253810 PMAQI
21st Jul 20254011 PMAQI
22nd Jul 20253812 AMAQI
22nd Jul 2025401 AMAQI
22nd Jul 2025402 AMAQI
22nd Jul 2025423 AMAQI
22°C15/30°C
22nd Jul 2025414 AMAQI
22nd Jul 2025405 AMAQI
22nd Jul 2025406 AMAQI
22nd Jul 2025397 AMAQI
22nd Jul 2025448 AMAQI
22nd Jul 2025419 AMAQI
22nd Jul 20254310 AMAQI
22nd Jul 20255011 AMAQI
22nd Jul 20255012 PMAQI
22nd Jul 2025481 PMAQI
22nd Jul 2025462 PMAQI
22nd Jul 2025513 PMAQI
22nd Jul 2025484 PMAQI
22nd Jul 2025505 PMAQI
22nd Jul 2025436 PMAQI
22nd Jul 2025417 PMAQI
22nd Jul 2025418 PMAQI
22nd Jul 2025429 PMAQI
22nd Jul 20254310 PMAQI
22nd Jul 20254011 PMAQI
23rd Jul 20254212 AMAQI
23rd Jul 2025401 AMAQI
23rd Jul 2025392 AMAQI
23rd Jul 2025383 AMAQI
21°C15/28°C
23rd Jul 2025404 AMAQI
23rd Jul 2025415 AMAQI
23rd Jul 2025446 AMAQI
23rd Jul 2025447 AMAQI
23rd Jul 2025428 AMAQI
23rd Jul 2025449 AMAQI
23rd Jul 20255210 AMAQI
23rd Jul 20255511 AMAQI
23rd Jul 20255212 PMAQI
23rd Jul 2025521 PMAQI
23rd Jul 2025482 PMAQI
23rd Jul 2025483 PMAQI
23rd Jul 2025464 PMAQI
23rd Jul 2025505 PMAQI
23rd Jul 2025506 PMAQI
23rd Jul 2025477 PMAQI
23rd Jul 2025448 PMAQI
23rd Jul 2025419 PMAQI
23rd Jul 20254510 PMAQI
23rd Jul 20254211 PMAQI
24th Jul 20254012 AMAQI
24th Jul 2025401 AMAQI
24th Jul 2025412 AMAQI
24th Jul 2025403 AMAQI
21°C15/29°C
24th Jul 2025464 AMAQI
24th Jul 2025445 AMAQI
24th Jul 2025446 AMAQI
24th Jul 2025447 AMAQI
24th Jul 2025428 AMAQI
24th Jul 2025459 AMAQI
24th Jul 20255010 AMAQI
24th Jul 20255411 AMAQI
24th Jul 20255412 PMAQI
24th Jul 2025521 PMAQI
24th Jul 2025542 PMAQI
24th Jul 2025523 PMAQI
24th Jul 2025524 PMAQI
24th Jul 2025495 PMAQI
24th Jul 2025516 PMAQI
24th Jul 2025527 PMAQI
24th Jul 2025508 PMAQI
24th Jul 2025459 PMAQI
24th Jul 20254610 PMAQI
24th Jul 20254711 PMAQI
25th Jul 20254812 AMAQI
25th Jul 2025451 AMAQI
25th Jul 2025452 AMAQI
25th Jul 2025463 AMAQI
22°C15/30°C
25th Jul 2025444 AMAQI
25th Jul 2025455 AMAQI
25th Jul 2025486 AMAQI
25th Jul 2025487 AMAQI
25th Jul 2025488 AMAQI
25th Jul 2025489 AMAQI
25th Jul 20254910 AMAQI
25th Jul 20254611 AMAQI
25th Jul 20254012 PMAQI
25th Jul 2025361 PMAQI
25th Jul 2025542 PMAQI
25th Jul 2025523 PMAQI
25th Jul 2025464 PMAQI
25th Jul 2025495 PMAQI
25th Jul 2025536 PMAQI
25th Jul 2025537 PMAQI
25th Jul 2025548 PMAQI
25th Jul 2025529 PMAQI
25th Jul 20255010 PMAQI
25th Jul 20255211 PMAQI
26th Jul 20255212 AMAQI
26th Jul 2025501 AMAQI
26th Jul 2025462 AMAQI
26th Jul 2025483 AMAQI
22°C15/30°C
26th Jul 2025514 AMAQI
26th Jul 2025505 AMAQI
26th Jul 2025506 AMAQI
26th Jul 2025487 AMAQI
26th Jul 2025478 AMAQI
26th Jul 2025509 AMAQI
26th Jul 20255010 AMAQI
26th Jul 20254611 AMAQI
26th Jul 20253712 PMAQI
26th Jul 2025331 PMAQI
26th Jul 2025352 PMAQI
26th Jul 2025323 PMAQI
26th Jul 2025374 PMAQI
26th Jul 2025335 PMAQI
26th Jul 2025366 PMAQI
26th Jul 2025407 PMAQI
26th Jul 2025408 PMAQI
26th Jul 2025469 PMAQI
26th Jul 20254710 PMAQI
26th Jul 20254611 PMAQI
27th Jul 20254612 AMAQI
27th Jul 2025481 AMAQI
27th Jul 2025482 AMAQI
27th Jul 2025503 AMAQI
23°C17/30°C
27th Jul 2025504 AMAQI
27th Jul 2025495 AMAQI
27th Jul 2025486 AMAQI
27th Jul 2025487 AMAQI
27th Jul 2025478 AMAQI
27th Jul 2025369 AMAQI
27th Jul 20253210 AMAQI
27th Jul 20253211 AMAQI
27th Jul 20253512 PMAQI
27th Jul 2025341 PMAQI
27th Jul 2025342 PMAQI
27th Jul 2025403 PMAQI
27th Jul 2025364 PMAQI
27th Jul 2025355 PMAQI
27th Jul 2025356 PMAQI
27th Jul 2025387 PMAQI
27th Jul 2025398 PMAQI
27th Jul 2025489 PMAQI
27th Jul 20254910 PMAQI
27th Jul 20255011 PMAQI
28th Jul 20254612 AMAQI
28th Jul 2025471 AMAQI
28th Jul 2025512 AMAQI
28th Jul 2025513 AMAQI
22°C16/28°C
28th Jul 2025484 AMAQI
28th Jul 2025485 AMAQI
28th Jul 2025486 AMAQI
28th Jul 2025457 AMAQI
28th Jul 2025458 AMAQI
28th Jul 2025489 AMAQI
28th Jul 20255410 AMAQI
28th Jul 20254011 AMAQI
28th Jul 20253412 PMAQI
28th Jul 2025431 PMAQI
28th Jul 2025482 PMAQI
28th Jul 2025423 PMAQI
28th Jul 2025514 PMAQI
28th Jul 2025445 PMAQI
28th Jul 2025486 PMAQI
28th Jul 2025477 PMAQI
28th Jul 2025498 PMAQI
28th Jul 2025449 PMAQI
28th Jul 20254410 PMAQI
28th Jul 20254411 PMAQI
29th Jul 20254412 AMAQI
29th Jul 2025441 AMAQI
29th Jul 2025502 AMAQI
29th Jul 2025463 AMAQI
21°C15/30°C
29th Jul 2025464 AMAQI
29th Jul 2025475 AMAQI
29th Jul 2025486 AMAQI
29th Jul 2025477 AMAQI
29th Jul 2025468 AMAQI
29th Jul 2025529 AMAQI
29th Jul 20255510 AMAQI
29th Jul 20255511 AMAQI
29th Jul 20255412 PMAQI
29th Jul 2025541 PMAQI
29th Jul 2025542 PMAQI
29th Jul 2025553 PMAQI
29th Jul 2025584 PMAQI
29th Jul 2025565 PMAQI
29th Jul 2025566 PMAQI
29th Jul 2025547 PMAQI
29th Jul 2025548 PMAQI
29th Jul 2025449 PMAQI
29th Jul 20254210 PMAQI
29th Jul 20254411 PMAQI
30th Jul 20254412 AMAQI
30th Jul 2025441 AMAQI
30th Jul 2025442 AMAQI
30th Jul 2025443 AMAQI
22°C15/30°C
30th Jul 2025454 AMAQI
30th Jul 2025475 AMAQI
30th Jul 2025486 AMAQI
30th Jul 2025477 AMAQI
30th Jul 2025488 AMAQI
30th Jul 2025529 AMAQI
30th Jul 20255610 AMAQI
30th Jul 20255411 AMAQI
30th Jul 20255412 PMAQI
30th Jul 2025541 PMAQI
30th Jul 2025542 PMAQI
30th Jul 2025533 PMAQI
30th Jul 2025504 PMAQI
30th Jul 2025485 PMAQI
30th Jul 2025506 PMAQI
30th Jul 2025507 PMAQI
30th Jul 2025448 PMAQI
30th Jul 2025439 PMAQI
30th Jul 20254210 PMAQI
30th Jul 20254311 PMAQI
31st Jul 20254312 AMAQI
31st Jul 2025441 AMAQI
31st Jul 2025462 AMAQI
31st Jul 2025473 AMAQI
22°C15/31°C
31st Jul 2025464 AMAQI
31st Jul 2025475 AMAQI
31st Jul 2025476 AMAQI
31st Jul 2025477 AMAQI
31st Jul 2025478 AMAQI
31st Jul 2025479 AMAQI
31st Jul 20254710 AMAQI
31st Jul 20255111 AMAQI
31st Jul 20254712 PMAQI
31st Jul 2025451 PMAQI
31st Jul 2025472 PMAQI
31st Jul 2025453 PMAQI
31st Jul 2025514 PMAQI
31st Jul 2025495 PMAQI
31st Jul 2025496 PMAQI
31st Jul 2025507 PMAQI
31st Jul 2025538 PMAQI
31st Jul 2025519 PMAQI
31st Jul 20254110 PMAQI
31st Jul 20254211 PMAQI
1st Aug 20254012 AMAQI
1st Aug 2025481 AMAQI
1st Aug 2025402 AMAQI
1st Aug 2025443 AMAQI
22°C15/31°C
1st Aug 2025424 AMAQI
1st Aug 2025405 AMAQI
1st Aug 2025396 AMAQI
1st Aug 2025427 AMAQI
1st Aug 2025428 AMAQI
1st Aug 2025389 AMAQI
1st Aug 20254610 AMAQI
1st Aug 20255211 AMAQI
1st Aug 20255112 PMAQI
1st Aug 2025591 PMAQI
1st Aug 2025502 PMAQI
1st Aug 2025463 PMAQI
1st Aug 2025524 PMAQI
1st Aug 2025575 PMAQI
1st Aug 2025546 PMAQI
1st Aug 2025517 PMAQI
1st Aug 2025468 PMAQI
1st Aug 2025469 PMAQI
1st Aug 20254510 PMAQI
1st Aug 20254311 PMAQI
2nd Aug 20253712 AMAQI
2nd Aug 2025381 AMAQI
2nd Aug 2025402 AMAQI
2nd Aug 2025423 AMAQI
22°C15/31°C
2nd Aug 2025444 AMAQI
2nd Aug 2025425 AMAQI
2nd Aug 2025426 AMAQI
2nd Aug 2025427 AMAQI
2nd Aug 2025428 AMAQI
2nd Aug 2025519 AMAQI
2nd Aug 20254110 AMAQI
2nd Aug 20254611 AMAQI
2nd Aug 20253812 PMAQI
2nd Aug 2025401 PMAQI
2nd Aug 2025512 PMAQI
2nd Aug 2025513 PMAQI
2nd Aug 2025504 PMAQI
2nd Aug 2025505 PMAQI
2nd Aug 2025546 PMAQI
2nd Aug 2025507 PMAQI
2nd Aug 2025478 PMAQI
2nd Aug 2025459 PMAQI
2nd Aug 20254110 PMAQI
2nd Aug 20254211 PMAQI
3rd Aug 20253612 AMAQI
3rd Aug 2025381 AMAQI
3rd Aug 2025402 AMAQI
3rd Aug 2025413 AMAQI
21°C15/28°C
3rd Aug 2025424 AMAQI
3rd Aug 2025425 AMAQI
3rd Aug 2025406 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025428 AMAQI
3rd Aug 2025429 AMAQI
3rd Aug 20255010 AMAQI
3rd Aug 20254811 AMAQI
3rd Aug 20255712 PMAQI
3rd Aug 2025561 PMAQI
3rd Aug 2025522 PMAQI
3rd Aug 2025493 PMAQI
3rd Aug 2025564 PMAQI
3rd Aug 2025585 PMAQI
3rd Aug 2025566 PMAQI
3rd Aug 2025607 PMAQI
3rd Aug 2025568 PMAQI
3rd Aug 2025479 PMAQI
3rd Aug 20254610 PMAQI
3rd Aug 20254811 PMAQI
4th Aug 20254212 AMAQI
4th Aug 2025421 AMAQI
4th Aug 2025402 AMAQI
4th Aug 2025423 AMAQI
22°C16/30°C
4th Aug 2025454 AMAQI
4th Aug 2025465 AMAQI
4th Aug 2025466 AMAQI
4th Aug 2025457 AMAQI
4th Aug 2025478 AMAQI
4th Aug 2025529 AMAQI
4th Aug 20255710 AMAQI
4th Aug 20256011 AMAQI
4th Aug 20256412 PMAQI
4th Aug 2025681 PMAQI
4th Aug 2025702 PMAQI
4th Aug 2025683 PMAQI
4th Aug 2025784 PMAQI
4th Aug 2025675 PMAQI
4th Aug 2025706 PMAQI
4th Aug 2025627 PMAQI
4th Aug 2025628 PMAQI
4th Aug 2025579 PMAQI
4th Aug 20255610 PMAQI
4th Aug 20255611 PMAQI
5th Aug 20255812 AMAQI
5th Aug 2025491 AMAQI
5th Aug 2025452 AMAQI
5th Aug 2025433 AMAQI
23°C16/31°C
5th Aug 2025524 AMAQI
4 AM5th Aug 2025525 AMAQI
5th Aug 2025536 AMAQI
5th Aug 2025547 AMAQI
5th Aug 2025538 AMAQI
5th Aug 2025549 AMAQI
5th Aug 20256010 AMAQI
5th Aug 20255611 AMAQI
11 AM5th Aug 20255812 PMAQI
5th Aug 2025551 PMAQI
5th Aug 2025562 PMAQI
5th Aug 2025503 PMAQI
5th Aug 2025504 PMAQI
5th Aug 2025475 PMAQI
7 PM
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 8 AM
48AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
9 AM - 7 PM
46AQI
11 hours / Day
330 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 8 AM (Avg. 48), while the lowest AQI was between 9 AM to 7 PM (Avg. 46).
Night time
Avg. Highest Time
12 AM - 11 PM
48AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
48AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 48), while the lowest AQI was between 12 AM to 11 PM (Avg. 48).
2025 Days Vs Air Quality
Hokujo, Omachi, Nagano, Japan
2025
85%
184
15%
32
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
184 DaysModerate
32 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 217 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
Hokujo, Omachi, Nagano, Japan
AQI levels in 2025
AQI
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.
1st January 2025
32AQI
32AQI
2nd January 2025
32AQI
32AQI
3rd January 2025
29AQI
29AQI
4th January 2025
29AQI
29AQI
5th January 2025
28AQI
28AQI
6th January 2025
35AQI
35AQI
7th January 2025
29AQI
29AQI
8th January 2025
28AQI
28AQI
9th January 2025
27AQI
27AQI
10th January 2025
25AQI
25AQI
11th January 2025
27AQI
27AQI
12th January 2025
28AQI
28AQI
13th January 2025
28AQI
28AQI
14th January 2025
31AQI
31AQI
15th January 2025
28AQI
28AQI
16th January 2025
26AQI
26AQI
17th January 2025
27AQI
27AQI
18th January 2025
28AQI
28AQI
19th January 2025
32AQI
32AQI
20th January 2025
33AQI
33AQI
21st January 2025
37AQI
37AQI
22nd January 2025
36AQI
36AQI
23rd January 2025
49AQI
49AQI
24th January 2025
43AQI
43AQI
25th January 2025
38AQI
38AQI
26th January 2025
35AQI
35AQI
27th January 2025
31AQI
31AQI
28th January 2025
31AQI
31AQI
29th January 2025
31AQI
31AQI
30th January 2025
33AQI
33AQI
31st January 2025
32AQI
32AQI
1st February 2025
40AQI
40AQI
2nd February 2025
38AQI
38AQI
3rd February 2025
37AQI
37AQI
4th February 2025
33AQI
33AQI
5th February 2025
34AQI
34AQI
6th February 2025
31AQI
31AQI
7th February 2025
33AQI
33AQI
8th February 2025
31AQI
31AQI
9th February 2025
30AQI
30AQI
10th February 2025
30AQI
30AQI
11th February 2025
32AQI
32AQI
12th February 2025
30AQI
30AQI
13th February 2025
31AQI
31AQI
14th February 2025
34AQI
34AQI
15th February 2025
31AQI
31AQI
16th February 2025
37AQI
37AQI
17th February 2025
38AQI
38AQI
18th February 2025
33AQI
33AQI
19th February 2025
33AQI
33AQI
20th February 2025
31AQI
31AQI
21st February 2025
31AQI
31AQI
22nd February 2025
32AQI
32AQI
23rd February 2025
32AQI
32AQI
24th February 2025
32AQI
32AQI
25th February 2025
34AQI
34AQI
26th February 2025
38AQI
38AQI
27th February 2025
47AQI
47AQI
28th February 2025
43AQI
43AQI
1st March 2025
47AQI
47AQI
2nd March 2025
43AQI
43AQI
3rd March 2025
39AQI
39AQI
4th March 2025
38AQI
38AQI
5th March 2025
35AQI
35AQI
6th March 2025
33AQI
33AQI
7th March 2025
36AQI
36AQI
8th March 2025
37AQI
37AQI
9th March 2025
36AQI
36AQI
10th March 2025
39AQI
39AQI
11th March 2025
37AQI
37AQI
12th March 2025
33AQI
33AQI
13th March 2025
46AQI
46AQI
14th March 2025
38AQI
38AQI
15th March 2025
38AQI
38AQI
16th March 2025
26AQI
26AQI
17th March 2025
26AQI
26AQI
18th March 2025
27AQI
27AQI
19th March 2025
23AQI
23AQI
20th March 2025
31AQI
31AQI
21st March 2025
44AQI
44AQI
22nd March 2025
48AQI
48AQI
23rd March 2025
60AQI
60AQI
24th March 2025
60AQI
60AQI
25th March 2025
74AQI
74AQI
26th March 2025
78AQI
78AQI
27th March 2025
68AQI
68AQI
28th March 2025
46AQI
46AQI
29th March 2025
41AQI
41AQI
30th March 2025
36AQI
36AQI
31st March 2025
35AQI
35AQI
1st April 2025
33AQI
33AQI
2nd April 2025
28AQI
28AQI
3rd April 2025
24AQI
24AQI
4th April 2025
25AQI
25AQI
5th April 2025
32AQI
32AQI
6th April 2025
29AQI
29AQI
7th April 2025
36AQI
36AQI
8th April 2025
41AQI
41AQI
9th April 2025
30AQI
30AQI
10th April 2025
43AQI
43AQI
11th April 2025
40AQI
40AQI
12th April 2025
47AQI
47AQI
13th April 2025
27AQI
27AQI
14th April 2025
35AQI
35AQI
15th April 2025
23AQI
23AQI
16th April 2025
31AQI
31AQI
17th April 2025
43AQI
43AQI
18th April 2025
50AQI
50AQI
19th April 2025
63AQI
63AQI
20th April 2025
51AQI
51AQI
21st April 2025
45AQI
45AQI
22nd April 2025
49AQI
49AQI
23rd April 2025
32AQI
32AQI
24th April 2025
31AQI
31AQI
25th April 2025
41AQI
41AQI
26th April 2025
50AQI
50AQI
27th April 2025
47AQI
47AQI
28th April 2025
47AQI
47AQI
29th April 2025
43AQI
43AQI
30th April 2025
54AQI
54AQI
1st May 2025
50AQI
50AQI
2nd May 2025
36AQI
36AQI
3rd May 2025
38AQI
38AQI
4th May 2025
34AQI
34AQI
5th May 2025
40AQI
40AQI
6th May 2025
36AQI
36AQI
7th May 2025
33AQI
33AQI
8th May 2025
36AQI
36AQI
9th May 2025
33AQI
33AQI
10th May 2025
27AQI
27AQI
11th May 2025
28AQI
28AQI
12th May 2025
34AQI
34AQI
13th May 2025
42AQI
42AQI
14th May 2025
49AQI
49AQI
15th May 2025
51AQI
51AQI
16th May 2025
52AQI
52AQI
17th May 2025
39AQI
39AQI
18th May 2025
42AQI
42AQI
19th May 2025
43AQI
43AQI
20th May 2025
57AQI
57AQI
21st May 2025
63AQI
63AQI
22nd May 2025
54AQI
54AQI
23rd May 2025
54AQI
54AQI
24th May 2025
46AQI
46AQI
25th May 2025
32AQI
32AQI
26th May 2025
33AQI
33AQI
27th May 2025
36AQI
36AQI
28th May 2025
33AQI
33AQI
29th May 2025
39AQI
39AQI
30th May 2025
31AQI
31AQI
31st May 2025
28AQI
28AQI
1st June 2025
27AQI
27AQI
2nd June 2025
38AQI
38AQI
3rd June 2025
31AQI
31AQI
4th June 2025
35AQI
35AQI
5th June 2025
35AQI
35AQI
6th June 2025
45AQI
45AQI
7th June 2025
48AQI
48AQI
8th June 2025
56AQI
56AQI
9th June 2025
58AQI
58AQI
10th June 2025
54AQI
54AQI
11th June 2025
39AQI
39AQI
12th June 2025
43AQI
43AQI
13th June 2025
48AQI
48AQI
14th June 2025
39AQI
39AQI
15th June 2025
29AQI
29AQI
16th June 2025
33AQI
33AQI
17th June 2025
42AQI
42AQI
18th June 2025
46AQI
46AQI
19th June 2025
49AQI
49AQI
20th June 2025
53AQI
53AQI
21st June 2025
54AQI
54AQI
22nd June 2025
56AQI
56AQI
23rd June 2025
46AQI
46AQI
24th June 2025
46AQI
46AQI
25th June 2025
43AQI
43AQI
26th June 2025
43AQI
43AQI
27th June 2025
49AQI
49AQI
28th June 2025
46AQI
46AQI
29th June 2025
49AQI
49AQI
30th June 2025
54AQI
54AQI
1st July 2025
56AQI
56AQI
2nd July 2025
52AQI
52AQI
3rd July 2025
54AQI
54AQI
4th July 2025
57AQI
57AQI
5th July 2025
60AQI
60AQI
6th July 2025
55AQI
55AQI
7th July 2025
59AQI
59AQI
8th July 2025
62AQI
62AQI
9th July 2025
63AQI
63AQI
10th July 2025
58AQI
58AQI
11th July 2025
49AQI
49AQI
12th July 2025
48AQI
48AQI
13th July 2025
49AQI
49AQI
14th July 2025
45AQI
45AQI
15th July 2025
39AQI
39AQI
16th July 2025
45AQI
45AQI
17th July 2025
37AQI
37AQI
18th July 2025
39AQI
39AQI
19th July 2025
38AQI
38AQI
20th July 2025
39AQI
39AQI
21st July 2025
39AQI
39AQI
22nd July 2025
43AQI
43AQI
23rd July 2025
45AQI
45AQI
24th July 2025
47AQI
47AQI
25th July 2025
48AQI
48AQI
26th July 2025
44AQI
44AQI
27th July 2025
42AQI
42AQI
28th July 2025
46AQI
46AQI
29th July 2025
50AQI
50AQI
30th July 2025
48AQI
48AQI
31st July 2025
47AQI
47AQI
1st August 2025
46AQI
46AQI
2nd August 2025
44AQI
44AQI
3rd August 2025
48AQI
48AQI
4th August 2025
51AQI
51AQI
32AQI
34AQI
42AQI
39AQI
40AQI
44AQI
48AQI
47AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202540AQI
31
28
26
5
27
3
25
6
23
7
21
10
3
1
184
32
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
January32AQI
202435AQI
31
27
22
4
10
2
20
28
2
31
31
23
6
31
29
1
31
314
15
Highest AQI recorded in
March44AQI
Lowest AQI recorded in
December27AQI
202341AQI
29
2
25
3
25
6
23
7
22
9
21
7
16
15
31
30
30
26
3
31
309
52
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
September31AQI
202239AQI
14
11
20
11
22
8
24
1
28
31
30
27
197
30
Highest AQI recorded in
May50AQI
Lowest AQI recorded in
August17AQI
202133AQI
30
1
27
1
26
3
18
1
19
12
13
17
27
4
31
28
31
29
21
300
39
Highest AQI recorded in
June54AQI
Lowest AQI recorded in
January16AQI
202021AQI
12
1
20
1
18
21
4
31
11
10
1
19
29
30
31
222
16
1
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
May7AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
41AQILeast Polluted Year Recorded
2020(Avg.)
21AQIHokujo's annual 2025 AQI (40) shows an average percentage change of 26.9% (worsened AQI) compared to previous years: 2020 (21), 2021 (33), 2022 (39), 2023 (41), 2024 (35).
