Shimomura, 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
Shimomura, Nagano, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
21st Aug 2023
59AQILowest AQI recorded on
21st Aug 2021
17AQISame Day Analysis (2nd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 43 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
Shimomura, Nagano, Japan
AQI
Day
Night
.
4 AM3rd Aug 2025
7 PM
3 AM4th Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
4PM3rd Aug
63AQI
Avg. Lowest Time
2AM4th Aug
39AQI
In the last 24 hours,
Shimomura's AQI reached its highest point of 63 at 4 PM during the Night, while the lowest point, 39, was recorded at 2 AM during the Night between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Shimomura, Nagano, Japan
JulAug
05th - 06th06th - 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
Day
Night
5th Jul 2025524 AMAQI
5th Jul 2025525 AMAQI
5th Jul 2025526 AMAQI
5th Jul 2025527 AMAQI
5th Jul 2025528 AMAQI
5th Jul 2025589 AMAQI
5th Jul 20256110 AMAQI
5th Jul 20256411 AMAQI
5th Jul 20256612 PMAQI
5th Jul 2025671 PMAQI
5th Jul 2025742 PMAQI
5th Jul 2025783 PMAQI
5th Jul 2025764 PMAQI
5th Jul 2025745 PMAQI
5th Jul 2025706 PMAQI
5th Jul 2025657 PMAQI
5th Jul 2025628 PMAQI
5th Jul 2025569 PMAQI
5th Jul 20255710 PMAQI
5th Jul 20255811 PMAQI
6th Jul 20255612 AMAQI
6th Jul 2025541 AMAQI
6th Jul 2025522 AMAQI
6th Jul 2025523 AMAQI
22°C17/30°C
6th Jul 2025524 AMAQI
6th Jul 2025545 AMAQI
6th Jul 2025546 AMAQI
6th Jul 2025557 AMAQI
6th Jul 2025548 AMAQI
6th Jul 2025589 AMAQI
6th Jul 20256410 AMAQI
6th Jul 20256011 AMAQI
6th Jul 20255812 PMAQI
6th Jul 2025561 PMAQI
6th Jul 2025582 PMAQI
6th Jul 2025553 PMAQI
6th Jul 2025534 PMAQI
6th Jul 2025525 PMAQI
6th Jul 2025516 PMAQI
6th Jul 2025537 PMAQI
6th Jul 2025558 PMAQI
6th Jul 2025539 PMAQI
6th Jul 20255110 PMAQI
6th Jul 20255311 PMAQI
7th Jul 20255412 AMAQI
7th Jul 2025541 AMAQI
7th Jul 2025542 AMAQI
7th Jul 2025543 AMAQI
24°C18/31°C
7th Jul 2025544 AMAQI
7th Jul 2025555 AMAQI
7th Jul 2025546 AMAQI
7th Jul 2025557 AMAQI
7th Jul 2025558 AMAQI
7th Jul 2025549 AMAQI
7th Jul 20255510 AMAQI
7th Jul 20255711 AMAQI
7th Jul 20255912 PMAQI
7th Jul 2025601 PMAQI
7th Jul 2025582 PMAQI
7th Jul 2025613 PMAQI
7th Jul 2025604 PMAQI
7th Jul 2025655 PMAQI
7th Jul 2025656 PMAQI
7th Jul 2025657 PMAQI
7th Jul 2025588 PMAQI
7th Jul 2025599 PMAQI
7th Jul 20256210 PMAQI
7th Jul 20256211 PMAQI
8th Jul 20256312 AMAQI
8th Jul 2025591 AMAQI
8th Jul 2025552 AMAQI
8th Jul 2025543 AMAQI
24°C19/30°C
8th Jul 2025544 AMAQI
8th Jul 2025565 AMAQI
8th Jul 2025556 AMAQI
8th Jul 2025567 AMAQI
8th Jul 2025568 AMAQI
8th Jul 2025579 AMAQI
8th Jul 20255710 AMAQI
8th Jul 20256311 AMAQI
8th Jul 20256812 PMAQI
8th Jul 2025701 PMAQI
8th Jul 2025652 PMAQI
8th Jul 2025653 PMAQI
8th Jul 2025624 PMAQI
8th Jul 2025645 PMAQI
8th Jul 2025666 PMAQI
8th Jul 2025717 PMAQI
8th Jul 2025708 PMAQI
8th Jul 2025679 PMAQI
8th Jul 20256810 PMAQI
8th Jul 20256911 PMAQI
9th Jul 20256812 AMAQI
9th Jul 2025641 AMAQI
9th Jul 2025572 AMAQI
9th Jul 2025583 AMAQI
24°C21/29°C
9th Jul 2025584 AMAQI
9th Jul 2025595 AMAQI
9th Jul 2025596 AMAQI
9th Jul 2025597 AMAQI
9th Jul 2025598 AMAQI
9th Jul 2025719 AMAQI
9th Jul 20257310 AMAQI
9th Jul 20256811 AMAQI
9th Jul 20256212 PMAQI
9th Jul 2025611 PMAQI
9th Jul 2025722 PMAQI
9th Jul 2025623 PMAQI
9th Jul 2025614 PMAQI
9th Jul 2025645 PMAQI
9th Jul 2025686 PMAQI
9th Jul 2025827 PMAQI
9th Jul 2025638 PMAQI
9th Jul 2025569 PMAQI
9th Jul 20255710 PMAQI
9th Jul 20255611 PMAQI
10th Jul 20255612 AMAQI
10th Jul 2025571 AMAQI
10th Jul 2025622 AMAQI
10th Jul 2025623 AMAQI
23°C19/30°C
10th Jul 2025624 AMAQI
10th Jul 2025635 AMAQI
10th Jul 2025636 AMAQI
10th Jul 2025627 AMAQI
10th Jul 2025648 AMAQI
10th Jul 2025579 AMAQI
10th Jul 20255810 AMAQI
10th Jul 20256611 AMAQI
10th Jul 20257212 PMAQI
10th Jul 2025741 PMAQI
10th Jul 2025692 PMAQI
10th Jul 2025713 PMAQI
10th Jul 2025674 PMAQI
10th Jul 2025585 PMAQI
10th Jul 2025576 PMAQI
10th Jul 2025547 PMAQI
10th Jul 2025478 PMAQI
10th Jul 2025529 PMAQI
10th Jul 20255310 PMAQI
10th Jul 20255311 PMAQI
11th Jul 20255212 AMAQI
11th Jul 2025581 AMAQI
11th Jul 2025622 AMAQI
11th Jul 2025623 AMAQI
23°C18/30°C
11th Jul 2025634 AMAQI
11th Jul 2025625 AMAQI
11th Jul 2025626 AMAQI
11th Jul 2025627 AMAQI
11th Jul 2025638 AMAQI
11th Jul 2025299 AMAQI
11th Jul 20251810 AMAQI
11th Jul 20251811 AMAQI
11th Jul 20252312 PMAQI
11th Jul 2025341 PMAQI
11th Jul 2025392 PMAQI
11th Jul 2025373 PMAQI
11th Jul 2025394 PMAQI
11th Jul 2025395 PMAQI
11th Jul 2025386 PMAQI
11th Jul 2025397 PMAQI
11th Jul 2025448 PMAQI
11th Jul 2025549 PMAQI
11th Jul 20255410 PMAQI
11th Jul 20255411 PMAQI
12th Jul 20255412 AMAQI
12th Jul 2025551 AMAQI
12th Jul 2025602 AMAQI
12th Jul 2025613 AMAQI
21°C17/27°C
12th Jul 2025584 AMAQI
12th Jul 2025565 AMAQI
12th Jul 2025576 AMAQI
12th Jul 2025567 AMAQI
12th Jul 2025568 AMAQI
12th Jul 2025299 AMAQI
12th Jul 20252510 AMAQI
12th Jul 20253111 AMAQI
12th Jul 20253212 PMAQI
12th Jul 2025361 PMAQI
12th Jul 2025392 PMAQI
12th Jul 2025403 PMAQI
12th Jul 2025424 PMAQI
12th Jul 2025375 PMAQI
12th Jul 2025376 PMAQI
12th Jul 2025407 PMAQI
12th Jul 2025458 PMAQI
12th Jul 2025539 PMAQI
12th Jul 20255310 PMAQI
12th Jul 20255311 PMAQI
13th Jul 20255312 AMAQI
13th Jul 2025551 AMAQI
13th Jul 2025582 AMAQI
13th Jul 2025573 AMAQI
22°C18/30°C
13th Jul 2025564 AMAQI
13th Jul 2025555 AMAQI
13th Jul 2025556 AMAQI
13th Jul 2025557 AMAQI
13th Jul 2025558 AMAQI
13th Jul 2025439 AMAQI
13th Jul 20253110 AMAQI
13th Jul 20253011 AMAQI
13th Jul 20253212 PMAQI
13th Jul 2025351 PMAQI
13th Jul 2025382 PMAQI
13th Jul 2025403 PMAQI
13th Jul 2025464 PMAQI
13th Jul 2025395 PMAQI
13th Jul 2025416 PMAQI
13th Jul 2025427 PMAQI
13th Jul 2025458 PMAQI
13th Jul 2025539 PMAQI
13th Jul 20255310 PMAQI
13th Jul 20255311 PMAQI
14th Jul 20255212 AMAQI
14th Jul 2025541 AMAQI
14th Jul 2025562 AMAQI
14th Jul 2025563 AMAQI
23°C18/30°C
14th Jul 2025554 AMAQI
14th Jul 2025545 AMAQI
14th Jul 2025546 AMAQI
14th Jul 2025547 AMAQI
14th Jul 2025548 AMAQI
14th Jul 2025389 AMAQI
14th Jul 20253410 AMAQI
14th Jul 20252611 AMAQI
14th Jul 20252212 PMAQI
14th Jul 2025251 PMAQI
14th Jul 2025282 PMAQI
14th Jul 2025343 PMAQI
14th Jul 2025394 PMAQI
14th Jul 2025345 PMAQI
14th Jul 2025276 PMAQI
14th Jul 2025237 PMAQI
14th Jul 2025268 PMAQI
14th Jul 2025429 PMAQI
14th Jul 20254210 PMAQI
14th Jul 20254511 PMAQI
15th Jul 20254412 AMAQI
15th Jul 2025481 AMAQI
15th Jul 2025542 AMAQI
15th Jul 2025553 AMAQI
23°C17/29°C
15th Jul 2025544 AMAQI
15th Jul 2025525 AMAQI
15th Jul 2025526 AMAQI
15th Jul 2025527 AMAQI
15th Jul 2025528 AMAQI
15th Jul 2025259 AMAQI
15th Jul 20251610 AMAQI
15th Jul 20251511 AMAQI
15th Jul 20251512 PMAQI
15th Jul 2025201 PMAQI
15th Jul 2025202 PMAQI
15th Jul 2025203 PMAQI
15th Jul 2025214 PMAQI
15th Jul 2025195 PMAQI
15th Jul 2025186 PMAQI
15th Jul 2025207 PMAQI
15th Jul 2025228 PMAQI
15th Jul 2025399 PMAQI
15th Jul 20254010 PMAQI
15th Jul 20254111 PMAQI
16th Jul 20254212 AMAQI
16th Jul 2025471 AMAQI
16th Jul 2025532 AMAQI
16th Jul 2025523 AMAQI
21°C18/26°C
16th Jul 2025524 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025486 AMAQI
16th Jul 2025497 AMAQI
16th Jul 2025488 AMAQI
16th Jul 2025359 AMAQI
16th Jul 20254010 AMAQI
16th Jul 20254011 AMAQI
16th Jul 20254412 PMAQI
16th Jul 2025491 PMAQI
16th Jul 2025482 PMAQI
16th Jul 2025443 PMAQI
16th Jul 2025424 PMAQI
16th Jul 2025425 PMAQI
16th Jul 2025376 PMAQI
16th Jul 2025357 PMAQI
16th Jul 2025308 PMAQI
16th Jul 2025389 PMAQI
16th Jul 20253910 PMAQI
16th Jul 20253911 PMAQI
17th Jul 20253812 AMAQI
17th Jul 2025461 AMAQI
17th Jul 2025512 AMAQI
17th Jul 2025513 AMAQI
22°C16/28°C
17th Jul 2025514 AMAQI
17th Jul 2025505 AMAQI
17th Jul 2025516 AMAQI
17th Jul 2025507 AMAQI
17th Jul 2025508 AMAQI
17th Jul 2025259 AMAQI
17th Jul 20251710 AMAQI
17th Jul 20251711 AMAQI
17th Jul 20251612 PMAQI
17th Jul 2025211 PMAQI
17th Jul 2025212 PMAQI
17th Jul 2025293 PMAQI
17th Jul 2025224 PMAQI
17th Jul 2025245 PMAQI
17th Jul 2025296 PMAQI
17th Jul 2025327 PMAQI
17th Jul 2025328 PMAQI
17th Jul 2025419 PMAQI
17th Jul 20254110 PMAQI
17th Jul 20253811 PMAQI
18th Jul 20253812 AMAQI
18th Jul 2025411 AMAQI
18th Jul 2025502 AMAQI
18th Jul 2025503 AMAQI
20°C17/22°C
18th Jul 2025484 AMAQI
18th Jul 2025465 AMAQI
18th Jul 2025456 AMAQI
18th Jul 2025457 AMAQI
18th Jul 2025448 AMAQI
18th Jul 2025269 AMAQI
18th Jul 20252310 AMAQI
18th Jul 20252511 AMAQI
18th Jul 20252412 PMAQI
18th Jul 2025261 PMAQI
18th Jul 2025292 PMAQI
18th Jul 2025323 PMAQI
18th Jul 2025324 PMAQI
18th Jul 2025325 PMAQI
18th Jul 2025316 PMAQI
18th Jul 2025327 PMAQI
18th Jul 2025348 PMAQI
18th Jul 2025409 PMAQI
18th Jul 20253810 PMAQI
18th Jul 20253711 PMAQI
19th Jul 20253812 AMAQI
19th Jul 2025421 AMAQI
19th Jul 2025472 AMAQI
19th Jul 2025463 AMAQI
22°C15/29°C
19th Jul 2025454 AMAQI
19th Jul 2025435 AMAQI
19th Jul 2025426 AMAQI
19th Jul 2025427 AMAQI
19th Jul 2025428 AMAQI
19th Jul 2025269 AMAQI
19th Jul 20252110 AMAQI
19th Jul 20252111 AMAQI
19th Jul 20252212 PMAQI
19th Jul 2025261 PMAQI
19th Jul 2025272 PMAQI
19th Jul 2025283 PMAQI
19th Jul 2025294 PMAQI
19th Jul 2025245 PMAQI
19th Jul 2025246 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025328 PMAQI
19th Jul 2025389 PMAQI
19th Jul 20254110 PMAQI
19th Jul 20253611 PMAQI
20th Jul 20253612 AMAQI
20th Jul 2025391 AMAQI
20th Jul 2025442 AMAQI
20th Jul 2025443 AMAQI
23°C18/30°C
20th Jul 2025434 AMAQI
20th Jul 2025415 AMAQI
20th Jul 2025416 AMAQI
20th Jul 2025417 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025319 AMAQI
20th Jul 20252010 AMAQI
20th Jul 20252211 AMAQI
20th Jul 20252112 PMAQI
20th Jul 2025201 PMAQI
20th Jul 2025232 PMAQI
20th Jul 2025263 PMAQI
20th Jul 2025264 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025266 PMAQI
20th Jul 2025287 PMAQI
20th Jul 2025368 PMAQI
20th Jul 2025379 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253811 PMAQI
21st Jul 20253612 AMAQI
21st Jul 2025381 AMAQI
21st Jul 2025422 AMAQI
21st Jul 2025413 AMAQI
23°C17/31°C
21st Jul 2025404 AMAQI
21st Jul 2025385 AMAQI
21st Jul 2025396 AMAQI
21st Jul 2025397 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025319 AMAQI
21st Jul 20253010 AMAQI
21st Jul 20253211 AMAQI
21st Jul 20253212 PMAQI
21st Jul 2025321 PMAQI
21st Jul 2025362 PMAQI
21st Jul 2025353 PMAQI
21st Jul 2025354 PMAQI
21st Jul 2025405 PMAQI
21st Jul 2025376 PMAQI
21st Jul 2025387 PMAQI
21st Jul 2025368 PMAQI
21st Jul 2025379 PMAQI
21st Jul 20253810 PMAQI
21st Jul 20253711 PMAQI
22nd Jul 20253712 AMAQI
22nd Jul 2025401 AMAQI
22nd Jul 2025402 AMAQI
22nd Jul 2025403 AMAQI
24°C18/32°C
22nd Jul 2025394 AMAQI
22nd Jul 2025385 AMAQI
22nd Jul 2025386 AMAQI
22nd Jul 2025397 AMAQI
22nd Jul 2025388 AMAQI
22nd Jul 2025339 AMAQI
22nd Jul 20253810 AMAQI
22nd Jul 20254711 AMAQI
22nd Jul 20254412 PMAQI
22nd Jul 2025441 PMAQI
22nd Jul 2025452 PMAQI
22nd Jul 2025503 PMAQI
22nd Jul 2025434 PMAQI
22nd Jul 2025395 PMAQI
22nd Jul 2025376 PMAQI
22nd Jul 2025447 PMAQI
22nd Jul 2025388 PMAQI
22nd Jul 2025399 PMAQI
22nd Jul 20253910 PMAQI
22nd Jul 20253611 PMAQI
23rd Jul 20253812 AMAQI
23rd Jul 2025381 AMAQI
23rd Jul 2025402 AMAQI
23rd Jul 2025393 AMAQI
23°C18/32°C
23rd Jul 2025404 AMAQI
23rd Jul 2025405 AMAQI
23rd Jul 2025406 AMAQI
23rd Jul 2025407 AMAQI
23rd Jul 2025408 AMAQI
23rd Jul 2025449 AMAQI
23rd Jul 20255210 AMAQI
23rd Jul 20255311 AMAQI
23rd Jul 20255412 PMAQI
23rd Jul 2025561 PMAQI
23rd Jul 2025542 PMAQI
23rd Jul 2025513 PMAQI
23rd Jul 2025504 PMAQI
23rd Jul 2025525 PMAQI
23rd Jul 2025476 PMAQI
23rd Jul 2025367 PMAQI
23rd Jul 2025338 PMAQI
23rd Jul 2025369 PMAQI
23rd Jul 20253810 PMAQI
23rd Jul 20253511 PMAQI
24th Jul 20253612 AMAQI
24th Jul 2025381 AMAQI
24th Jul 2025412 AMAQI
24th Jul 2025413 AMAQI
23°C18/31°C
24th Jul 2025424 AMAQI
24th Jul 2025435 AMAQI
24th Jul 2025436 AMAQI
24th Jul 2025427 AMAQI
24th Jul 2025428 AMAQI
24th Jul 2025349 AMAQI
24th Jul 20253810 AMAQI
24th Jul 20254811 AMAQI
24th Jul 20255312 PMAQI
24th Jul 2025541 PMAQI
24th Jul 2025542 PMAQI
24th Jul 2025513 PMAQI
24th Jul 2025474 PMAQI
24th Jul 2025435 PMAQI
24th Jul 2025446 PMAQI
24th Jul 2025427 PMAQI
24th Jul 2025408 PMAQI
24th Jul 2025359 PMAQI
24th Jul 20253410 PMAQI
24th Jul 20253411 PMAQI
25th Jul 20253412 AMAQI
25th Jul 2025381 AMAQI
25th Jul 2025422 AMAQI
25th Jul 2025423 AMAQI
23°C17/31°C
25th Jul 2025434 AMAQI
25th Jul 2025445 AMAQI
25th Jul 2025446 AMAQI
25th Jul 2025447 AMAQI
25th Jul 2025448 AMAQI
25th Jul 2025309 AMAQI
25th Jul 20252610 AMAQI
25th Jul 20252811 AMAQI
25th Jul 20253112 PMAQI
25th Jul 2025391 PMAQI
25th Jul 2025462 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025374 PMAQI
25th Jul 2025375 PMAQI
25th Jul 2025356 PMAQI
25th Jul 2025307 PMAQI
25th Jul 2025348 PMAQI
25th Jul 2025399 PMAQI
25th Jul 20253910 PMAQI
25th Jul 20253811 PMAQI
26th Jul 20253612 AMAQI
26th Jul 2025381 AMAQI
26th Jul 2025412 AMAQI
26th Jul 2025423 AMAQI
22°C18/31°C
26th Jul 2025424 AMAQI
26th Jul 2025405 AMAQI
26th Jul 2025426 AMAQI
26th Jul 2025407 AMAQI
26th Jul 2025408 AMAQI
26th Jul 2025279 AMAQI
26th Jul 20252610 AMAQI
26th Jul 20253211 AMAQI
26th Jul 20253012 PMAQI
26th Jul 2025321 PMAQI
26th Jul 2025342 PMAQI
26th Jul 2025343 PMAQI
26th Jul 2025384 PMAQI
26th Jul 2025375 PMAQI
26th Jul 2025336 PMAQI
26th Jul 2025257 PMAQI
26th Jul 2025318 PMAQI
26th Jul 2025369 PMAQI
26th Jul 20253310 PMAQI
26th Jul 20253211 PMAQI
27th Jul 20253412 AMAQI
27th Jul 2025361 AMAQI
27th Jul 2025402 AMAQI
27th Jul 2025403 AMAQI
23°C17/31°C
27th Jul 2025394 AMAQI
27th Jul 2025395 AMAQI
27th Jul 2025386 AMAQI
27th Jul 2025387 AMAQI
27th Jul 2025388 AMAQI
27th Jul 2025299 AMAQI
27th Jul 20252410 AMAQI
27th Jul 20253011 AMAQI
27th Jul 20253612 PMAQI
27th Jul 2025321 PMAQI
27th Jul 2025352 PMAQI
27th Jul 2025353 PMAQI
27th Jul 2025334 PMAQI
27th Jul 2025405 PMAQI
27th Jul 2025316 PMAQI
27th Jul 2025307 PMAQI
27th Jul 2025308 PMAQI
27th Jul 2025359 PMAQI
27th Jul 20253210 PMAQI
27th Jul 20253211 PMAQI
28th Jul 20253412 AMAQI
28th Jul 2025351 AMAQI
28th Jul 2025382 AMAQI
28th Jul 2025383 AMAQI
23°C18/31°C
28th Jul 2025384 AMAQI
28th Jul 2025375 AMAQI
28th Jul 2025376 AMAQI
28th Jul 2025377 AMAQI
28th Jul 2025378 AMAQI
28th Jul 2025309 AMAQI
28th Jul 20253210 AMAQI
28th Jul 20253311 AMAQI
28th Jul 20253412 PMAQI
28th Jul 2025371 PMAQI
28th Jul 2025422 PMAQI
28th Jul 2025483 PMAQI
28th Jul 2025424 PMAQI
28th Jul 2025445 PMAQI
28th Jul 2025526 PMAQI
28th Jul 2025537 PMAQI
28th Jul 2025488 PMAQI
28th Jul 2025419 PMAQI
28th Jul 20254310 PMAQI
28th Jul 20254011 PMAQI
29th Jul 20253812 AMAQI
29th Jul 2025381 AMAQI
29th Jul 2025382 AMAQI
29th Jul 2025373 AMAQI
24°C18/31°C
29th Jul 2025384 AMAQI
29th Jul 2025385 AMAQI
29th Jul 2025386 AMAQI
29th Jul 2025387 AMAQI
29th Jul 2025388 AMAQI
29th Jul 2025469 AMAQI
29th Jul 20255310 AMAQI
29th Jul 20255511 AMAQI
29th Jul 20255512 PMAQI
29th Jul 2025551 PMAQI
29th Jul 2025582 PMAQI
29th Jul 2025613 PMAQI
29th Jul 2025624 PMAQI
29th Jul 2025585 PMAQI
29th Jul 2025586 PMAQI
29th Jul 2025537 PMAQI
29th Jul 2025468 PMAQI
29th Jul 2025439 PMAQI
29th Jul 20254610 PMAQI
29th Jul 20254511 PMAQI
30th Jul 20254012 AMAQI
30th Jul 2025401 AMAQI
30th Jul 2025402 AMAQI
30th Jul 2025403 AMAQI
25°C18/33°C
30th Jul 2025414 AMAQI
30th Jul 2025435 AMAQI
30th Jul 2025426 AMAQI
30th Jul 2025437 AMAQI
30th Jul 2025438 AMAQI
30th Jul 2025509 AMAQI
30th Jul 20255410 AMAQI
30th Jul 20255611 AMAQI
30th Jul 20255612 PMAQI
30th Jul 2025571 PMAQI
30th Jul 2025572 PMAQI
30th Jul 2025563 PMAQI
30th Jul 2025524 PMAQI
30th Jul 2025525 PMAQI
30th Jul 2025506 PMAQI
30th Jul 2025527 PMAQI
30th Jul 2025478 PMAQI
30th Jul 2025409 PMAQI
30th Jul 20254010 PMAQI
30th Jul 20254011 PMAQI
31st Jul 20254212 AMAQI
31st Jul 2025411 AMAQI
31st Jul 2025422 AMAQI
31st Jul 2025423 AMAQI
24°C18/32°C
31st Jul 2025424 AMAQI
31st Jul 2025425 AMAQI
31st Jul 2025426 AMAQI
31st Jul 2025427 AMAQI
31st Jul 2025428 AMAQI
31st Jul 2025429 AMAQI
31st Jul 20254210 AMAQI
31st Jul 20254311 AMAQI
31st Jul 20254512 PMAQI
31st Jul 2025511 PMAQI
31st Jul 2025492 PMAQI
31st Jul 2025423 PMAQI
31st Jul 2025364 PMAQI
31st Jul 2025345 PMAQI
31st Jul 2025316 PMAQI
31st Jul 2025317 PMAQI
31st Jul 2025408 PMAQI
31st Jul 2025509 PMAQI
31st Jul 20253610 PMAQI
31st Jul 20253411 PMAQI
1st Aug 20253612 AMAQI
1st Aug 2025431 AMAQI
1st Aug 2025342 AMAQI
1st Aug 2025363 AMAQI
23°C18/31°C
1st Aug 2025374 AMAQI
1st Aug 2025355 AMAQI
1st Aug 2025366 AMAQI
1st Aug 2025357 AMAQI
1st Aug 2025388 AMAQI
1st Aug 2025299 AMAQI
1st Aug 20253710 AMAQI
1st Aug 20254711 AMAQI
1st Aug 20255212 PMAQI
1st Aug 2025631 PMAQI
1st Aug 2025452 PMAQI
1st Aug 2025413 PMAQI
1st Aug 2025524 PMAQI
1st Aug 2025485 PMAQI
1st Aug 2025526 PMAQI
1st Aug 2025527 PMAQI
1st Aug 2025438 PMAQI
1st Aug 2025469 PMAQI
1st Aug 20254410 PMAQI
1st Aug 20253511 PMAQI
2nd Aug 20253912 AMAQI
2nd Aug 2025371 AMAQI
2nd Aug 2025402 AMAQI
2nd Aug 2025393 AMAQI
23°C17/29°C
2nd Aug 2025414 AMAQI
2nd Aug 2025405 AMAQI
2nd Aug 2025406 AMAQI
2nd Aug 2025407 AMAQI
2nd Aug 2025418 AMAQI
2nd Aug 2025469 AMAQI
2nd Aug 20254010 AMAQI
2nd Aug 20255011 AMAQI
2nd Aug 20254612 PMAQI
2nd Aug 2025441 PMAQI
2nd Aug 2025542 PMAQI
2nd Aug 2025553 PMAQI
2nd Aug 2025504 PMAQI
2nd Aug 2025545 PMAQI
2nd Aug 2025556 PMAQI
2nd Aug 2025507 PMAQI
2nd Aug 2025448 PMAQI
2nd Aug 2025449 PMAQI
2nd Aug 20254410 PMAQI
2nd Aug 20254311 PMAQI
3rd Aug 20253412 AMAQI
3rd Aug 2025371 AMAQI
3rd Aug 2025382 AMAQI
3rd Aug 2025393 AMAQI
24°C19/32°C
3rd Aug 2025404 AMAQI
3rd Aug 2025425 AMAQI
3rd Aug 2025406 AMAQI
3rd Aug 2025407 AMAQI
3rd Aug 2025408 AMAQI
3rd Aug 2025459 AMAQI
3rd Aug 20255410 AMAQI
3rd Aug 20255011 AMAQI
3rd Aug 20256112 PMAQI
3rd Aug 2025561 PMAQI
3rd Aug 2025622 PMAQI
3rd Aug 2025513 PMAQI
3rd Aug 2025634 PMAQI
3rd Aug 2025595 PMAQI
3rd Aug 2025586 PMAQI
3rd Aug 2025597 PMAQI
3rd Aug 2025588 PMAQI
3rd Aug 2025489 PMAQI
3rd Aug 20254710 PMAQI
3rd Aug 20254511 PMAQI
4th Aug 20254212 AMAQI
4th Aug 2025401 AMAQI
4th Aug 2025392 AMAQI
4th Aug 2025423 AMAQI
--°C/°C
4 AM
11 AM
7 PM
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 8 AM
47AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
9 AM - 10 AM
39AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 8 AM (Avg. 47), while the lowest AQI was between 9 AM to 10 AM (Avg. 39).
Night time
Avg. Highest Time
12 AM - 3 AM
46AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
8 PM
42AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 46), while the lowest AQI was between 8 PM to 8 PM (Avg. 42).
2025 Days Vs Air Quality
Shimomura, Nagano, Japan
2025
88%
188
12%
26
Total number of days with different AQI categories in last 215 days in 2025 (150 days remaining)
Good
188 DaysModerate
26 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 215 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
Shimomura, 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
30AQI
30AQI
2nd January 2025
30AQI
30AQI
3rd January 2025
29AQI
29AQI
4th January 2025
28AQI
28AQI
5th January 2025
28AQI
28AQI
6th January 2025
31AQI
31AQI
7th January 2025
27AQI
27AQI
8th January 2025
26AQI
26AQI
9th January 2025
26AQI
26AQI
10th January 2025
24AQI
24AQI
11th January 2025
26AQI
26AQI
12th January 2025
28AQI
28AQI
13th January 2025
26AQI
26AQI
14th January 2025
29AQI
29AQI
15th January 2025
30AQI
30AQI
16th January 2025
25AQI
25AQI
17th January 2025
25AQI
25AQI
18th January 2025
25AQI
25AQI
19th January 2025
27AQI
27AQI
20th January 2025
35AQI
35AQI
21st January 2025
32AQI
32AQI
22nd January 2025
37AQI
37AQI
23rd January 2025
48AQI
48AQI
24th January 2025
52AQI
52AQI
25th January 2025
37AQI
37AQI
26th January 2025
35AQI
35AQI
27th January 2025
28AQI
28AQI
28th January 2025
29AQI
29AQI
29th January 2025
30AQI
30AQI
30th January 2025
28AQI
28AQI
31st January 2025
32AQI
32AQI
1st February 2025
45AQI
45AQI
2nd February 2025
41AQI
41AQI
3rd February 2025
43AQI
43AQI
4th February 2025
35AQI
35AQI
5th February 2025
36AQI
36AQI
6th February 2025
32AQI
32AQI
7th February 2025
35AQI
35AQI
8th February 2025
31AQI
31AQI
9th February 2025
30AQI
30AQI
10th February 2025
30AQI
30AQI
11th February 2025
31AQI
31AQI
12th February 2025
31AQI
31AQI
13th February 2025
32AQI
32AQI
14th February 2025
30AQI
30AQI
15th February 2025
31AQI
31AQI
16th February 2025
44AQI
44AQI
17th February 2025
39AQI
39AQI
18th February 2025
37AQI
37AQI
19th February 2025
33AQI
33AQI
20th February 2025
31AQI
31AQI
21st February 2025
31AQI
31AQI
22nd February 2025
31AQI
31AQI
23rd February 2025
32AQI
32AQI
24th February 2025
32AQI
32AQI
25th February 2025
34AQI
34AQI
26th February 2025
36AQI
36AQI
27th February 2025
44AQI
44AQI
28th February 2025
40AQI
40AQI
1st March 2025
41AQI
41AQI
2nd March 2025
46AQI
46AQI
3rd March 2025
37AQI
37AQI
4th March 2025
40AQI
40AQI
5th March 2025
34AQI
34AQI
6th March 2025
35AQI
35AQI
7th March 2025
35AQI
35AQI
8th March 2025
37AQI
37AQI
9th March 2025
36AQI
36AQI
10th March 2025
38AQI
38AQI
11th March 2025
36AQI
36AQI
12th March 2025
32AQI
32AQI
13th March 2025
41AQI
41AQI
14th March 2025
42AQI
42AQI
15th March 2025
39AQI
39AQI
16th March 2025
25AQI
25AQI
17th March 2025
22AQI
22AQI
18th March 2025
24AQI
24AQI
19th March 2025
19AQI
19AQI
20th March 2025
27AQI
27AQI
21st March 2025
42AQI
42AQI
22nd March 2025
48AQI
48AQI
23rd March 2025
58AQI
58AQI
24th March 2025
60AQI
60AQI
25th March 2025
73AQI
73AQI
26th March 2025
91AQI
91AQI
27th March 2025
69AQI
69AQI
28th March 2025
46AQI
46AQI
29th March 2025
38AQI
38AQI
30th March 2025
38AQI
38AQI
31st March 2025
33AQI
33AQI
1st April 2025
36AQI
36AQI
2nd April 2025
24AQI
24AQI
3rd April 2025
24AQI
24AQI
4th April 2025
22AQI
22AQI
5th April 2025
31AQI
31AQI
6th April 2025
24AQI
24AQI
7th April 2025
34AQI
34AQI
8th April 2025
41AQI
41AQI
9th April 2025
28AQI
28AQI
10th April 2025
45AQI
45AQI
11th April 2025
37AQI
37AQI
12th April 2025
46AQI
46AQI
13th April 2025
25AQI
25AQI
14th April 2025
31AQI
31AQI
15th April 2025
21AQI
21AQI
16th April 2025
29AQI
29AQI
17th April 2025
45AQI
45AQI
18th April 2025
53AQI
53AQI
19th April 2025
66AQI
66AQI
20th April 2025
54AQI
54AQI
21st April 2025
46AQI
46AQI
22nd April 2025
48AQI
48AQI
23rd April 2025
28AQI
28AQI
24th April 2025
30AQI
30AQI
25th April 2025
38AQI
38AQI
26th April 2025
44AQI
44AQI
27th April 2025
47AQI
47AQI
28th April 2025
44AQI
44AQI
29th April 2025
39AQI
39AQI
30th April 2025
53AQI
53AQI
1st May 2025
45AQI
45AQI
2nd May 2025
33AQI
33AQI
3rd May 2025
36AQI
36AQI
4th May 2025
36AQI
36AQI
5th May 2025
38AQI
38AQI
6th May 2025
28AQI
28AQI
7th May 2025
28AQI
28AQI
8th May 2025
34AQI
34AQI
9th May 2025
31AQI
31AQI
10th May 2025
26AQI
26AQI
11th May 2025
25AQI
25AQI
12th May 2025
26AQI
26AQI
13th May 2025
39AQI
39AQI
14th May 2025
43AQI
43AQI
15th May 2025
46AQI
46AQI
16th May 2025
47AQI
47AQI
17th May 2025
30AQI
30AQI
18th May 2025
43AQI
43AQI
19th May 2025
41AQI
41AQI
20th May 2025
62AQI
62AQI
21st May 2025
63AQI
63AQI
22nd May 2025
54AQI
54AQI
23rd May 2025
55AQI
55AQI
24th May 2025
47AQI
47AQI
25th May 2025
30AQI
30AQI
26th May 2025
31AQI
31AQI
27th May 2025
31AQI
31AQI
28th May 2025
30AQI
30AQI
29th May 2025
38AQI
38AQI
30th May 2025
24AQI
24AQI
31st May 2025
23AQI
23AQI
1st June 2025
23AQI
23AQI
2nd June 2025
33AQI
33AQI
3rd June 2025
22AQI
22AQI
4th June 2025
30AQI
30AQI
5th June 2025
35AQI
35AQI
6th June 2025
43AQI
43AQI
7th June 2025
45AQI
45AQI
8th June 2025
54AQI
54AQI
9th June 2025
55AQI
55AQI
10th June 2025
32AQI
32AQI
11th June 2025
30AQI
30AQI
12th June 2025
40AQI
40AQI
13th June 2025
48AQI
48AQI
14th June 2025
34AQI
34AQI
15th June 2025
27AQI
27AQI
16th June 2025
31AQI
31AQI
17th June 2025
37AQI
37AQI
18th June 2025
46AQI
46AQI
19th June 2025
50AQI
50AQI
20th June 2025
53AQI
53AQI
21st June 2025
51AQI
51AQI
22nd June 2025
54AQI
54AQI
23rd June 2025
38AQI
38AQI
24th June 2025
36AQI
36AQI
25th June 2025
33AQI
33AQI
26th June 2025
31AQI
31AQI
27th June 2025
38AQI
38AQI
28th June 2025
39AQI
39AQI
29th June 2025
44AQI
44AQI
30th June 2025
48AQI
48AQI
1st July 2025
52AQI
52AQI
2nd July 2025
44AQI
44AQI
3rd July 2025
46AQI
46AQI
4th July 2025
49AQI
49AQI
5th July 2025
60AQI
60AQI
6th July 2025
54AQI
54AQI
7th July 2025
58AQI
58AQI
8th July 2025
62AQI
62AQI
9th July 2025
63AQI
63AQI
10th July 2025
60AQI
60AQI
11th July 2025
47AQI
47AQI
12th July 2025
47AQI
47AQI
13th July 2025
47AQI
47AQI
14th July 2025
41AQI
41AQI
15th July 2025
35AQI
35AQI
16th July 2025
43AQI
43AQI
17th July 2025
36AQI
36AQI
18th July 2025
37AQI
37AQI
19th July 2025
34AQI
34AQI
20th July 2025
33AQI
33AQI
21st July 2025
37AQI
37AQI
22nd July 2025
40AQI
40AQI
23rd July 2025
43AQI
43AQI
24th July 2025
42AQI
42AQI
25th July 2025
38AQI
38AQI
26th July 2025
35AQI
35AQI
27th July 2025
35AQI
35AQI
28th July 2025
40AQI
40AQI
29th July 2025
47AQI
47AQI
30th July 2025
46AQI
46AQI
31st July 2025
41AQI
41AQI
1st August 2025
42AQI
42AQI
2nd August 2025
43AQI
43AQI
30AQI
35AQI
41AQI
38AQI
38AQI
39AQI
45AQI
43AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202538AQI
30
1
28
26
5
26
4
27
4
25
5
24
7
2
188
26
Highest AQI recorded in
July45AQI
Lowest AQI recorded in
January30AQI
202434AQI
31
29
29
2
22
8
31
21
9
31
29
2
26
4
31
30
31
341
25
Highest AQI recorded in
April48AQI
Lowest AQI recorded in
January26AQI
202337AQI
31
28
28
3
20
10
28
3
28
2
19
12
27
4
25
5
31
28
1
31
324
40
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
December27AQI
202235AQI
31
21
29
2
24
6
25
6
24
6
20
2
1
23
5
31
30
31
290
27
Highest AQI recorded in
May43AQI
Lowest AQI recorded in
August24AQI
202130AQI
31
27
1
30
1
23
30
1
25
5
27
4
27
4
29
1
31
30
31
341
17
Highest AQI recorded in
June43AQI
Lowest AQI recorded in
January16AQI
202028AQI
13
20
1
18
25
5
30
1
17
13
1
19
29
2
30
31
232
22
1
Highest AQI recorded in
August53AQI
Lowest AQI recorded in
December16AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2025(Avg.)
38AQILeast Polluted Year Recorded
2020(Avg.)
28AQIShimomura's annual 2025 AQI (38) shows an average percentage change of 17.9% (worsened AQI) compared to previous years: 2020 (28), 2021 (30), 2022 (35), 2023 (37), 2024 (34).
