Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Nikko, Tochigi, 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+

October Air Quality Analysis

Nikko, Tochigi, Japan

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Oct 2022
60AQI
Lowest AQI recorded on
25th Oct 2022
16AQI

Same Day Analysis (3rd October):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 47 of Good air quality, showing improvement over 2025 and 2022 on the same day.

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2026

Nikko, Tochigi, Japan

AQI
Day
Night
.

5 AM2nd Oct 2026

5 PM

4 AM3rd Oct 2026

Day time
Avg. Highest Time
5PM2nd Oct

49AQI

Avg. Lowest Time
6AM2nd Oct

26AQI

Night time
Avg. Highest Time
11PM2nd Oct

50AQI

Avg. Lowest Time
1AM3rd Oct

30AQI

In the last 24 hours,

Nikko's AQI reached its highest point of 50 at 11 PM during the Night, while the lowest point, 26, was recorded at 6 AM during the Day between 2nd Oct and 3rd Oct 2026.

Day & Night AQI Trend : Sep - Oct 2026

Nikko, Tochigi, Japan

SepOct
04th - 05th05th - 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 - 01st01st - 02nd02nd - 03rd03rd
Day
Night
4th Sep 2026215 AMAQI
4th Sep 2026266 AMAQI
4th Sep 2026297 AMAQI
4th Sep 2026248 AMAQI
4th Sep 2026259 AMAQI
4th Sep 20262310 AMAQI
4th Sep 20262611 AMAQI
4th Sep 20263212 PMAQI
4th Sep 2026251 PMAQI
4th Sep 2026232 PMAQI
4th Sep 2026213 PMAQI
4th Sep 2026214 PMAQI
4th Sep 2026255 PMAQI
4th Sep 2026326 PMAQI
4th Sep 2026247 PMAQI
4th Sep 2026258 PMAQI
4th Sep 2026259 PMAQI
4th Sep 20262110 PMAQI
4th Sep 20262511 PMAQI
5th Sep 20262412 AMAQI
5th Sep 2026281 AMAQI
5th Sep 2026292 AMAQI
5th Sep 2026213 AMAQI
5th Sep 2026244 AMAQI

20°C17/23°C

5th Sep 2026245 AMAQI
5th Sep 2026266 AMAQI
5th Sep 2026357 AMAQI
5th Sep 2026278 AMAQI
5th Sep 2026379 AMAQI
5th Sep 20265210 AMAQI
5th Sep 20265011 AMAQI
5th Sep 20264812 PMAQI
5th Sep 2026371 PMAQI
5th Sep 2026252 PMAQI
5th Sep 2026393 PMAQI
5th Sep 2026254 PMAQI
5th Sep 2026265 PMAQI
5th Sep 2026276 PMAQI
5th Sep 2026267 PMAQI
5th Sep 2026248 PMAQI
5th Sep 2026279 PMAQI
5th Sep 20262610 PMAQI
5th Sep 20263411 PMAQI
6th Sep 20262812 AMAQI
6th Sep 2026271 AMAQI
6th Sep 2026302 AMAQI
6th Sep 2026283 AMAQI
6th Sep 2026244 AMAQI

17°C16/19°C

6th Sep 2026215 AMAQI
6th Sep 2026216 AMAQI
6th Sep 2026247 AMAQI
6th Sep 2026298 AMAQI
6th Sep 2026389 AMAQI
6th Sep 20263110 AMAQI
6th Sep 20264211 AMAQI
6th Sep 20263912 PMAQI
6th Sep 2026431 PMAQI
6th Sep 2026342 PMAQI
6th Sep 2026353 PMAQI
6th Sep 2026244 PMAQI
6th Sep 2026305 PMAQI
6th Sep 2026346 PMAQI
6th Sep 2026327 PMAQI
6th Sep 2026308 PMAQI
6th Sep 2026339 PMAQI
6th Sep 20263410 PMAQI
6th Sep 20263811 PMAQI
7th Sep 20262512 AMAQI
7th Sep 2026251 AMAQI
7th Sep 2026332 AMAQI
7th Sep 2026333 AMAQI
7th Sep 2026284 AMAQI

17°C16/20°C

7th Sep 2026295 AMAQI
7th Sep 2026296 AMAQI
7th Sep 2026307 AMAQI
7th Sep 2026328 AMAQI
7th Sep 2026359 AMAQI
7th Sep 20264310 AMAQI
7th Sep 20265011 AMAQI
7th Sep 20261412 PMAQI
7th Sep 2026121 PMAQI
7th Sep 2026122 PMAQI
7th Sep 2026183 PMAQI
7th Sep 2026244 PMAQI
7th Sep 2026305 PMAQI
7th Sep 2026296 PMAQI
7th Sep 2026367 PMAQI
7th Sep 2026268 PMAQI
7th Sep 2026259 PMAQI
7th Sep 20263110 PMAQI
7th Sep 20262511 PMAQI
8th Sep 20262412 AMAQI
8th Sep 2026241 AMAQI
8th Sep 2026322 AMAQI
8th Sep 2026323 AMAQI
8th Sep 2026304 AMAQI

19°C17/21°C

8th Sep 2026335 AMAQI
8th Sep 2026346 AMAQI
8th Sep 2026367 AMAQI
8th Sep 2026278 AMAQI
8th Sep 2026249 AMAQI
8th Sep 20263010 AMAQI
8th Sep 20264011 AMAQI
8th Sep 20264112 PMAQI
8th Sep 2026391 PMAQI
8th Sep 2026292 PMAQI
8th Sep 2026213 PMAQI
8th Sep 2026234 PMAQI
8th Sep 2026255 PMAQI
8th Sep 2026256 PMAQI
8th Sep 2026247 PMAQI
8th Sep 2026228 PMAQI
8th Sep 2026239 PMAQI
8th Sep 20262610 PMAQI
8th Sep 20263511 PMAQI
9th Sep 20263912 AMAQI
9th Sep 2026321 AMAQI
9th Sep 2026362 AMAQI
9th Sep 2026353 AMAQI
9th Sep 2026304 AMAQI

19°C18/21°C

9th Sep 2026265 AMAQI
9th Sep 2026266 AMAQI
9th Sep 2026307 AMAQI
9th Sep 2026278 AMAQI
9th Sep 2026359 AMAQI
9th Sep 20263610 AMAQI
9th Sep 20264211 AMAQI
9th Sep 20262612 PMAQI
9th Sep 2026281 PMAQI
9th Sep 2026262 PMAQI
9th Sep 2026323 PMAQI
9th Sep 2026344 PMAQI
9th Sep 2026305 PMAQI
9th Sep 2026336 PMAQI
9th Sep 2026367 PMAQI
9th Sep 2026318 PMAQI
9th Sep 2026249 PMAQI
9th Sep 20262510 PMAQI
9th Sep 20263411 PMAQI
10th Sep 20263812 AMAQI
10th Sep 2026341 AMAQI
10th Sep 2026352 AMAQI
10th Sep 2026353 AMAQI
10th Sep 2026264 AMAQI

20°C15/24°C

10th Sep 2026295 AMAQI
10th Sep 2026256 AMAQI
10th Sep 2026237 AMAQI
10th Sep 2026288 AMAQI
10th Sep 2026369 AMAQI
10th Sep 20263610 AMAQI
10th Sep 20263811 AMAQI
10th Sep 20264412 PMAQI
10th Sep 2026281 PMAQI
10th Sep 2026342 PMAQI
10th Sep 2026223 PMAQI
10th Sep 2026254 PMAQI
10th Sep 2026355 PMAQI
10th Sep 2026306 PMAQI
10th Sep 2026337 PMAQI
10th Sep 2026358 PMAQI
10th Sep 2026409 PMAQI
10th Sep 20264010 PMAQI
10th Sep 20263411 PMAQI
11th Sep 20262712 AMAQI
11th Sep 2026311 AMAQI
11th Sep 2026262 AMAQI
11th Sep 2026303 AMAQI
11th Sep 2026264 AMAQI

15°C14/16°C

11th Sep 2026325 AMAQI
11th Sep 2026296 AMAQI
11th Sep 2026237 AMAQI
11th Sep 2026328 AMAQI
11th Sep 2026289 AMAQI
11th Sep 20262810 AMAQI
11th Sep 20262511 AMAQI
11th Sep 20263112 PMAQI
11th Sep 2026471 PMAQI
11th Sep 2026402 PMAQI
11th Sep 2026323 PMAQI
11th Sep 2026324 PMAQI
11th Sep 2026445 PMAQI
11th Sep 2026416 PMAQI
11th Sep 2026307 PMAQI
11th Sep 2026328 PMAQI
11th Sep 2026369 PMAQI
11th Sep 20263110 PMAQI
11th Sep 20262811 PMAQI
12th Sep 20262912 AMAQI
12th Sep 2026381 AMAQI
12th Sep 2026442 AMAQI
12th Sep 2026363 AMAQI
12th Sep 2026364 AMAQI

15°C14/17°C

12th Sep 2026365 AMAQI
12th Sep 2026336 AMAQI
12th Sep 2026307 AMAQI
12th Sep 2026318 AMAQI
12th Sep 2026419 AMAQI
12th Sep 20264810 AMAQI
12th Sep 20264911 AMAQI
12th Sep 20263912 PMAQI
12th Sep 2026451 PMAQI
12th Sep 2026372 PMAQI
12th Sep 2026313 PMAQI
12th Sep 2026314 PMAQI
12th Sep 2026265 PMAQI
12th Sep 2026256 PMAQI
12th Sep 2026287 PMAQI
12th Sep 2026308 PMAQI
12th Sep 2026269 PMAQI
12th Sep 20263710 PMAQI
12th Sep 20264311 PMAQI
13th Sep 20262412 AMAQI
13th Sep 2026251 AMAQI
13th Sep 2026262 AMAQI
13th Sep 2026243 AMAQI
13th Sep 2026244 AMAQI

19°C17/22°C

13th Sep 2026246 AMAQI
13th Sep 2026307 AMAQI
13th Sep 2026358 AMAQI
13th Sep 2026389 AMAQI
13th Sep 20262610 AMAQI
13th Sep 20262311 AMAQI
13th Sep 20262212 PMAQI
13th Sep 2026351 PMAQI
13th Sep 2026242 PMAQI
13th Sep 2026283 PMAQI
13th Sep 2026224 PMAQI
13th Sep 2026255 PMAQI
13th Sep 2026366 PMAQI
13th Sep 2026437 PMAQI
13th Sep 2026418 PMAQI
13th Sep 2026449 PMAQI
13th Sep 20263410 PMAQI
13th Sep 20263611 PMAQI
14th Sep 20263712 AMAQI
14th Sep 2026411 AMAQI
14th Sep 2026372 AMAQI
14th Sep 2026343 AMAQI
14th Sep 2026384 AMAQI

20°C17/22°C

14th Sep 2026415 AMAQI
14th Sep 2026376 AMAQI
14th Sep 2026337 AMAQI
14th Sep 2026358 AMAQI
14th Sep 2026309 AMAQI
14th Sep 20264610 AMAQI
14th Sep 20264411 AMAQI
14th Sep 20264612 PMAQI
14th Sep 2026331 PMAQI
14th Sep 2026342 PMAQI
14th Sep 2026263 PMAQI
14th Sep 2026264 PMAQI
14th Sep 2026335 PMAQI
14th Sep 2026286 PMAQI
14th Sep 2026277 PMAQI
14th Sep 2026268 PMAQI
14th Sep 2026299 PMAQI
14th Sep 20263410 PMAQI
14th Sep 20262511 PMAQI
15th Sep 20262512 AMAQI
15th Sep 2026281 AMAQI
15th Sep 2026242 AMAQI
15th Sep 2026283 AMAQI
15th Sep 2026244 AMAQI

22°C19/27°C

15th Sep 2026225 AMAQI
15th Sep 2026226 AMAQI
15th Sep 2026247 AMAQI
15th Sep 2026278 AMAQI
15th Sep 2026259 AMAQI
15th Sep 20262110 AMAQI
15th Sep 20263111 AMAQI
15th Sep 20264412 PMAQI
15th Sep 2026361 PMAQI
15th Sep 2026262 PMAQI
15th Sep 2026323 PMAQI
15th Sep 2026364 PMAQI
15th Sep 2026325 PMAQI
15th Sep 2026406 PMAQI
15th Sep 2026407 PMAQI
15th Sep 2026418 PMAQI
15th Sep 2026449 PMAQI
15th Sep 20263010 PMAQI
15th Sep 20262611 PMAQI
16th Sep 20262412 AMAQI
16th Sep 2026261 AMAQI
16th Sep 2026212 AMAQI
16th Sep 2026243 AMAQI
16th Sep 2026284 AMAQI

18°C17/20°C

16th Sep 2026315 AMAQI
16th Sep 2026356 AMAQI
16th Sep 2026327 AMAQI
16th Sep 2026268 AMAQI
16th Sep 2026399 AMAQI
16th Sep 20264210 AMAQI
16th Sep 20264211 AMAQI
16th Sep 20264312 PMAQI
16th Sep 2026441 PMAQI
16th Sep 2026362 PMAQI
16th Sep 2026373 PMAQI
16th Sep 2026434 PMAQI
16th Sep 2026395 PMAQI
16th Sep 2026436 PMAQI
16th Sep 2026387 PMAQI
16th Sep 2026368 PMAQI
16th Sep 2026449 PMAQI
16th Sep 20263510 PMAQI
16th Sep 20264211 PMAQI
17th Sep 20262812 AMAQI
17th Sep 2026281 AMAQI
17th Sep 2026322 AMAQI
17th Sep 2026263 AMAQI
17th Sep 2026344 AMAQI

17°C15/18°C

17th Sep 2026335 AMAQI
17th Sep 2026216 AMAQI
17th Sep 2026297 AMAQI
17th Sep 2026338 AMAQI
17th Sep 2026309 AMAQI
17th Sep 20264810 AMAQI
17th Sep 20264011 AMAQI
17th Sep 20263912 PMAQI
17th Sep 2026381 PMAQI
17th Sep 2026382 PMAQI
17th Sep 2026423 PMAQI
17th Sep 2026414 PMAQI
17th Sep 2026355 PMAQI
17th Sep 2026306 PMAQI
17th Sep 2026307 PMAQI
17th Sep 2026328 PMAQI
17th Sep 2026449 PMAQI
17th Sep 20264610 PMAQI
17th Sep 20264011 PMAQI
18th Sep 20263112 AMAQI
18th Sep 2026241 AMAQI
18th Sep 2026282 AMAQI
18th Sep 2026323 AMAQI
18th Sep 2026364 AMAQI

17°C15/20°C

18th Sep 2026445 AMAQI
18th Sep 2026416 AMAQI
18th Sep 2026477 AMAQI
18th Sep 2026418 AMAQI
18th Sep 2026409 AMAQI
18th Sep 20265010 AMAQI
18th Sep 20263911 AMAQI
18th Sep 20263612 PMAQI
18th Sep 2026281 PMAQI
18th Sep 2026372 PMAQI
18th Sep 2026343 PMAQI
18th Sep 2026264 PMAQI
18th Sep 2026295 PMAQI
18th Sep 2026286 PMAQI
18th Sep 2026247 PMAQI
18th Sep 2026368 PMAQI
18th Sep 2026349 PMAQI
18th Sep 20262310 PMAQI
18th Sep 20263211 PMAQI
19th Sep 20263212 AMAQI
19th Sep 2026311 AMAQI
19th Sep 2026322 AMAQI
19th Sep 2026333 AMAQI
19th Sep 2026334 AMAQI

17°C15/20°C

19th Sep 2026385 AMAQI
19th Sep 2026376 AMAQI
19th Sep 2026377 AMAQI
19th Sep 2026368 AMAQI
19th Sep 2026429 AMAQI
19th Sep 20264210 AMAQI
19th Sep 20264411 AMAQI
19th Sep 20265012 PMAQI
19th Sep 2026421 PMAQI
19th Sep 2026402 PMAQI
19th Sep 2026363 PMAQI
19th Sep 2026364 PMAQI
19th Sep 2026305 PMAQI
19th Sep 2026356 PMAQI
19th Sep 2026427 PMAQI
19th Sep 2026478 PMAQI
19th Sep 2026459 PMAQI
19th Sep 20264810 PMAQI
19th Sep 20264511 PMAQI
20th Sep 20264412 AMAQI
20th Sep 2026311 AMAQI
20th Sep 2026362 AMAQI
20th Sep 2026373 AMAQI
20th Sep 2026354 AMAQI

20°C17/23°C

20th Sep 2026285 AMAQI
20th Sep 2026336 AMAQI
20th Sep 2026337 AMAQI
20th Sep 2026348 AMAQI
20th Sep 2026379 AMAQI
20th Sep 20263410 AMAQI
20th Sep 20263611 AMAQI
20th Sep 20264112 PMAQI
20th Sep 2026341 PMAQI
20th Sep 2026332 PMAQI
20th Sep 2026273 PMAQI
20th Sep 2026304 PMAQI
20th Sep 2026295 PMAQI
20th Sep 2026406 PMAQI
20th Sep 2026387 PMAQI
20th Sep 2026398 PMAQI
20th Sep 2026399 PMAQI
20th Sep 20264010 PMAQI
20th Sep 20263611 PMAQI
21st Sep 20262412 AMAQI
21st Sep 2026281 AMAQI
21st Sep 2026312 AMAQI
21st Sep 2026403 AMAQI
21st Sep 2026364 AMAQI

19°C17/20°C

21st Sep 2026355 AMAQI
21st Sep 2026376 AMAQI
21st Sep 2026427 AMAQI
21st Sep 2026368 AMAQI
21st Sep 2026419 AMAQI
21st Sep 20264210 AMAQI
21st Sep 20264411 AMAQI
21st Sep 20263912 PMAQI
21st Sep 2026441 PMAQI
21st Sep 2026352 PMAQI
21st Sep 2026353 PMAQI
21st Sep 2026324 PMAQI
21st Sep 2026385 PMAQI
21st Sep 2026356 PMAQI
21st Sep 2026367 PMAQI
21st Sep 2026358 PMAQI
21st Sep 2026309 PMAQI
21st Sep 20263010 PMAQI
21st Sep 20263111 PMAQI
22nd Sep 20263412 AMAQI
22nd Sep 2026261 AMAQI
22nd Sep 2026402 AMAQI
22nd Sep 2026443 AMAQI
22nd Sep 2026344 AMAQI

20°C18/23°C

22nd Sep 2026245 AMAQI
22nd Sep 2026146 AMAQI
22nd Sep 2026127 AMAQI
22nd Sep 2026328 AMAQI
22nd Sep 2026269 AMAQI
22nd Sep 20264110 AMAQI
22nd Sep 20263611 AMAQI
22nd Sep 20264012 PMAQI
22nd Sep 2026431 PMAQI
22nd Sep 2026432 PMAQI
22nd Sep 2026413 PMAQI
22nd Sep 2026394 PMAQI
22nd Sep 2026425 PMAQI
22nd Sep 2026446 PMAQI
22nd Sep 2026447 PMAQI
22nd Sep 2026468 PMAQI
22nd Sep 2026469 PMAQI
22nd Sep 20264110 PMAQI
22nd Sep 20263911 PMAQI
23rd Sep 20264012 AMAQI
23rd Sep 2026391 AMAQI
23rd Sep 2026442 AMAQI
23rd Sep 2026373 AMAQI
23rd Sep 2026384 AMAQI

23°C17/26°C

23rd Sep 2026365 AMAQI
23rd Sep 2026336 AMAQI
23rd Sep 2026277 AMAQI
23rd Sep 2026298 AMAQI
23rd Sep 2026249 AMAQI
23rd Sep 20263010 AMAQI
23rd Sep 20263011 AMAQI
23rd Sep 20262612 PMAQI
23rd Sep 2026321 PMAQI
23rd Sep 2026332 PMAQI
23rd Sep 2026373 PMAQI
23rd Sep 2026284 PMAQI
23rd Sep 2026265 PMAQI
23rd Sep 2026266 PMAQI
23rd Sep 2026277 PMAQI
23rd Sep 2026318 PMAQI
23rd Sep 2026399 PMAQI
23rd Sep 20263810 PMAQI
23rd Sep 20263311 PMAQI
24th Sep 20264312 AMAQI
24th Sep 2026441 AMAQI
24th Sep 2026342 AMAQI
24th Sep 2026353 AMAQI
24th Sep 2026274 AMAQI

16°C15/18°C

24th Sep 2026335 AMAQI
24th Sep 2026376 AMAQI
24th Sep 2026347 AMAQI
24th Sep 2026368 AMAQI
24th Sep 2026329 AMAQI
24th Sep 20264210 AMAQI
24th Sep 20263911 AMAQI
24th Sep 20264112 PMAQI
24th Sep 2026441 PMAQI
24th Sep 2026352 PMAQI
24th Sep 2026343 PMAQI
24th Sep 2026384 PMAQI
24th Sep 2026365 PMAQI
24th Sep 2026366 PMAQI
24th Sep 2026357 PMAQI
24th Sep 2026468 PMAQI
24th Sep 2026509 PMAQI
24th Sep 20264210 PMAQI
24th Sep 20264011 PMAQI
25th Sep 20262912 AMAQI
25th Sep 2026281 AMAQI
25th Sep 2026332 AMAQI
25th Sep 2026273 AMAQI
25th Sep 2026324 AMAQI

20°C15/24°C

25th Sep 2026325 AMAQI
25th Sep 2026286 AMAQI
25th Sep 2026307 AMAQI
25th Sep 2026398 AMAQI
25th Sep 2026419 AMAQI
25th Sep 20264610 AMAQI
25th Sep 20264211 AMAQI
25th Sep 20263612 PMAQI
25th Sep 2026381 PMAQI
25th Sep 2026332 PMAQI
25th Sep 2026333 PMAQI
25th Sep 2026364 PMAQI
25th Sep 2026355 PMAQI
25th Sep 2026426 PMAQI
25th Sep 2026387 PMAQI
25th Sep 2026398 PMAQI
25th Sep 2026419 PMAQI
25th Sep 20263610 PMAQI
25th Sep 20263611 PMAQI
26th Sep 20263312 AMAQI
26th Sep 2026351 AMAQI
26th Sep 2026292 AMAQI
26th Sep 2026243 AMAQI
26th Sep 2026244 AMAQI

18°C16/21°C

26th Sep 2026245 AMAQI
26th Sep 2026226 AMAQI
26th Sep 2026237 AMAQI
26th Sep 2026288 AMAQI
26th Sep 2026369 AMAQI
26th Sep 20264110 AMAQI
26th Sep 20264811 AMAQI
26th Sep 20263812 PMAQI
26th Sep 2026351 PMAQI
26th Sep 2026382 PMAQI
26th Sep 2026373 PMAQI
26th Sep 2026334 PMAQI
26th Sep 2026335 PMAQI
26th Sep 2026366 PMAQI
26th Sep 2026337 PMAQI
26th Sep 2026358 PMAQI
26th Sep 2026409 PMAQI
26th Sep 20263410 PMAQI
26th Sep 20263111 PMAQI
27th Sep 20263012 AMAQI
27th Sep 2026261 AMAQI
27th Sep 2026252 AMAQI
27th Sep 2026243 AMAQI
27th Sep 2026224 AMAQI

14°C13/15°C

27th Sep 2026255 AMAQI
27th Sep 2026266 AMAQI
27th Sep 2026277 AMAQI
27th Sep 2026268 AMAQI
27th Sep 2026289 AMAQI
27th Sep 20262810 AMAQI
27th Sep 20263411 AMAQI
27th Sep 20262612 PMAQI
27th Sep 2026361 PMAQI
27th Sep 2026372 PMAQI
27th Sep 2026343 PMAQI
27th Sep 2026274 PMAQI
27th Sep 2026355 PMAQI
27th Sep 2026266 PMAQI
27th Sep 2026277 PMAQI
27th Sep 2026238 PMAQI
27th Sep 2026339 PMAQI
27th Sep 20262410 PMAQI
27th Sep 20262811 PMAQI
28th Sep 20264012 AMAQI
28th Sep 2026361 AMAQI
28th Sep 2026342 AMAQI
28th Sep 2026363 AMAQI
28th Sep 2026394 AMAQI

17°C15/19°C

28th Sep 2026355 AMAQI
28th Sep 2026366 AMAQI
28th Sep 2026357 AMAQI
28th Sep 2026288 AMAQI
28th Sep 2026399 AMAQI
28th Sep 20264810 AMAQI
28th Sep 20264411 AMAQI
28th Sep 20265012 PMAQI
28th Sep 2026421 PMAQI
28th Sep 2026482 PMAQI
28th Sep 2026483 PMAQI
28th Sep 2026404 PMAQI
28th Sep 2026355 PMAQI
28th Sep 2026346 PMAQI
28th Sep 2026317 PMAQI
28th Sep 2026318 PMAQI
28th Sep 2026289 PMAQI
28th Sep 20263210 PMAQI
28th Sep 20264511 PMAQI
29th Sep 20263712 AMAQI
29th Sep 2026351 AMAQI
29th Sep 2026402 AMAQI
29th Sep 2026433 AMAQI
29th Sep 2026424 AMAQI

18°C17/20°C

29th Sep 2026345 AMAQI
29th Sep 2026406 AMAQI
29th Sep 2026457 AMAQI
29th Sep 2026448 AMAQI
29th Sep 2026439 AMAQI
29th Sep 20264410 AMAQI
29th Sep 20264311 AMAQI
29th Sep 20264612 PMAQI
29th Sep 2026391 PMAQI
29th Sep 2026442 PMAQI
29th Sep 2026413 PMAQI
29th Sep 2026344 PMAQI
29th Sep 2026355 PMAQI
29th Sep 2026386 PMAQI
29th Sep 2026427 PMAQI
29th Sep 2026358 PMAQI
29th Sep 2026529 PMAQI
29th Sep 20265310 PMAQI
29th Sep 20265011 PMAQI
30th Sep 20264512 AMAQI
30th Sep 2026351 AMAQI
30th Sep 2026382 AMAQI
30th Sep 2026383 AMAQI
30th Sep 2026384 AMAQI

16°C14/20°C

30th Sep 2026365 AMAQI
30th Sep 2026286 AMAQI
30th Sep 2026277 AMAQI
30th Sep 2026268 AMAQI
30th Sep 2026389 AMAQI
30th Sep 20264610 AMAQI
30th Sep 20264411 AMAQI
30th Sep 20264712 PMAQI
30th Sep 2026441 PMAQI
30th Sep 2026372 PMAQI
30th Sep 2026283 PMAQI
30th Sep 2026354 PMAQI
30th Sep 2026425 PMAQI
30th Sep 2026346 PMAQI
30th Sep 2026257 PMAQI
30th Sep 2026378 PMAQI
30th Sep 2026399 PMAQI
30th Sep 20264110 PMAQI
30th Sep 20264211 PMAQI
1st Oct 20263612 AMAQI
1st Oct 2026381 AMAQI
1st Oct 2026322 AMAQI
1st Oct 2026383 AMAQI
1st Oct 2026354 AMAQI

15°C13/18°C

1st Oct 2026265 AMAQI
1st Oct 2026306 AMAQI
1st Oct 2026327 AMAQI
1st Oct 2026408 AMAQI
1st Oct 2026419 AMAQI
1st Oct 20263610 AMAQI
1st Oct 20263111 AMAQI
1st Oct 20263412 PMAQI
1st Oct 2026261 PMAQI
1st Oct 2026372 PMAQI
1st Oct 2026343 PMAQI
1st Oct 2026304 PMAQI
1st Oct 2026305 PMAQI
1st Oct 2026356 PMAQI
1st Oct 2026317 PMAQI
1st Oct 2026288 PMAQI
1st Oct 2026289 PMAQI
1st Oct 20264410 PMAQI
1st Oct 20265211 PMAQI
2nd Oct 20264612 AMAQI
2nd Oct 2026261 AMAQI
2nd Oct 2026282 AMAQI
2nd Oct 2026353 AMAQI
2nd Oct 2026404 AMAQI

19°C14/24°C

2nd Oct 2026405 AMAQI
2nd Oct 2026266 AMAQI
2nd Oct 2026317 AMAQI
2nd Oct 2026298 AMAQI
2nd Oct 2026349 AMAQI
2nd Oct 20264510 AMAQI
2nd Oct 20264411 AMAQI
2nd Oct 20264812 PMAQI
2nd Oct 2026481 PMAQI
2nd Oct 2026402 PMAQI
2nd Oct 2026473 PMAQI
2nd Oct 2026484 PMAQI
2nd Oct 2026495 PMAQI
2nd Oct 2026456 PMAQI
2nd Oct 2026487 PMAQI
2nd Oct 2026468 PMAQI
2nd Oct 2026499 PMAQI
2nd Oct 20264910 PMAQI
2nd Oct 20265011 PMAQI
3rd Oct 20263412 AMAQI
3rd Oct 2026301 AMAQI
3rd Oct 2026402 AMAQI
3rd Oct 2026393 AMAQI
3rd Oct 2026424 AMAQI

15°C13/19°C

3rd Oct 2026425 AMAQI
5 AM
3rd Oct 2026366 AMAQI
3rd Oct 2026407 AMAQI
3rd Oct 2026278 AMAQI
3rd Oct 2026399 AMAQI
3rd Oct 20265810 AMAQI
3rd Oct 20265711 AMAQI
11 AM
3rd Oct 20266212 PMAQI
3rd Oct 2026641 PMAQI
3rd Oct 2026592 PMAQI
3rd Oct 2026563 PMAQI
3rd Oct 2026534 PMAQI
3rd Oct 2026565 PMAQI
5 PM
3rd Oct 2026486 PMAQI
3rd Oct 2026467 PMAQI
3rd Oct 2026478 PMAQI
3rd Oct 2026519 PMAQI
3rd Oct 20265210 PMAQI
3rd Oct 20265511 PMAQI
11 PM
4 AM

16°C10/20°C

Day time
Avg. Highest Time
10 AM - 1 PM

39AQI

4 hours / Day
120 hours / Month
Avg. Lowest Time
6 AM

30AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 1 PM (Avg. 39), while the lowest AQI was between 6 AM to 6 AM (Avg. 30).
Night time
Avg. Highest Time
9 PM - 11 PM

37AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
1 AM

31AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 37), while the lowest AQI was between 1 AM to 1 AM (Avg. 31).

2026 Days Vs Air Quality

Nikko, Tochigi, Japan

2026

88%

244

12%

32

Total number of days with different AQI categories in last 276 days in 2026 (89 days remaining)

Good
244 Days
Moderate
32 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 88%

Health Risk Level:

Low

In 2026, 88% of 276 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

Nikko, Tochigi, Japan

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
16AQI (US)
2nd January 2026
14AQI (US)
3rd January 2026
15AQI (US)
4th January 2026
16AQI (US)
5th January 2026
20AQI (US)
6th January 2026
20AQI (US)
7th January 2026
28AQI (US)
8th January 2026
26AQI (US)
9th January 2026
22AQI (US)
10th January 2026
34AQI (US)
11th January 2026
30AQI (US)
12th January 2026
13AQI (US)
13th January 2026
23AQI (US)
14th January 2026
12AQI (US)
15th January 2026
27AQI (US)
16th January 2026
42AQI (US)
17th January 2026
47AQI (US)
18th January 2026
26AQI (US)
19th January 2026
45AQI (US)
20th January 2026
28AQI (US)
21st January 2026
17AQI (US)
22nd January 2026
25AQI (US)
23rd January 2026
47AQI (US)
24th January 2026
48AQI (US)
25th January 2026
42AQI (US)
26th January 2026
17AQI (US)
27th January 2026
24AQI (US)
28th January 2026
26AQI (US)
29th January 2026
22AQI (US)
30th January 2026
36AQI (US)
31st January 2026
40AQI (US)
1st February 2026
40AQI (US)
2nd February 2026
13AQI (US)
3rd February 2026
20AQI (US)
4th February 2026
46AQI (US)
5th February 2026
46AQI (US)
6th February 2026
40AQI (US)
7th February 2026
16AQI (US)
8th February 2026
14AQI (US)
9th February 2026
39AQI (US)
10th February 2026
46AQI (US)
11th February 2026
48AQI (US)
12th February 2026
34AQI (US)
13th February 2026
46AQI (US)
14th February 2026
68AQI (US)
15th February 2026
64AQI (US)
16th February 2026
51AQI (US)
17th February 2026
18AQI (US)
18th February 2026
30AQI (US)
19th February 2026
28AQI (US)
20th February 2026
28AQI (US)
21st February 2026
44AQI (US)
22nd February 2026
42AQI (US)
23rd February 2026
47AQI (US)
24th February 2026
33AQI (US)
25th February 2026
32AQI (US)
26th February 2026
10AQI (US)
27th February 2026
43AQI (US)
28th February 2026
44AQI (US)
1st March 2026
46AQI (US)
2nd March 2026
86AQI (US)
3rd March 2026
50AQI (US)
4th March 2026
65AQI (US)
5th March 2026
64AQI (US)
6th March 2026
55AQI (US)
7th March 2026
47AQI (US)
8th March 2026
51AQI (US)
9th March 2026
45AQI (US)
10th March 2026
56AQI (US)
11th March 2026
58AQI (US)
12th March 2026
70AQI (US)
13th March 2026
42AQI (US)
14th March 2026
49AQI (US)
15th March 2026
60AQI (US)
16th March 2026
63AQI (US)
17th March 2026
58AQI (US)
18th March 2026
60AQI (US)
19th March 2026
38AQI (US)
20th March 2026
30AQI (US)
21st March 2026
55AQI (US)
22nd March 2026
53AQI (US)
23rd March 2026
51AQI (US)
24th March 2026
44AQI (US)
25th March 2026
55AQI (US)
26th March 2026
16AQI (US)
27th March 2026
15AQI (US)
28th March 2026
49AQI (US)
29th March 2026
58AQI (US)
30th March 2026
57AQI (US)
31st March 2026
40AQI (US)
1st April 2026
10AQI (US)
2nd April 2026
22AQI (US)
3rd April 2026
47AQI (US)
4th April 2026
45AQI (US)
5th April 2026
12AQI (US)
6th April 2026
17AQI (US)
7th April 2026
30AQI (US)
8th April 2026
20AQI (US)
9th April 2026
30AQI (US)
10th April 2026
46AQI (US)
11th April 2026
35AQI (US)
12th April 2026
32AQI (US)
13th April 2026
35AQI (US)
14th April 2026
43AQI (US)
15th April 2026
45AQI (US)
16th April 2026
34AQI (US)
17th April 2026
38AQI (US)
18th April 2026
38AQI (US)
19th April 2026
38AQI (US)
20th April 2026
37AQI (US)
21st April 2026
40AQI (US)
22nd April 2026
46AQI (US)
23rd April 2026
35AQI (US)
24th April 2026
32AQI (US)
25th April 2026
45AQI (US)
26th April 2026
50AQI (US)
27th April 2026
48AQI (US)
28th April 2026
40AQI (US)
29th April 2026
39AQI (US)
30th April 2026
41AQI (US)
1st May 2026
47AQI (US)
2nd May 2026
52AQI (US)
3rd May 2026
46AQI (US)
4th May 2026
29AQI (US)
5th May 2026
20AQI (US)
6th May 2026
34AQI (US)
7th May 2026
36AQI (US)
8th May 2026
28AQI (US)
9th May 2026
28AQI (US)
10th May 2026
35AQI (US)
11th May 2026
35AQI (US)
12th May 2026
42AQI (US)
13th May 2026
43AQI (US)
14th May 2026
37AQI (US)
15th May 2026
39AQI (US)
16th May 2026
85AQI (US)
17th May 2026
68AQI (US)
18th May 2026
54AQI (US)
19th May 2026
49AQI (US)
20th May 2026
62AQI (US)
21st May 2026
60AQI (US)
22nd May 2026
61AQI (US)
23rd May 2026
54AQI (US)
24th May 2026
58AQI (US)
25th May 2026
48AQI (US)
26th May 2026
40AQI (US)
27th May 2026
25AQI (US)
28th May 2026
26AQI (US)
29th May 2026
25AQI (US)
30th May 2026
24AQI (US)
31st May 2026
26AQI (US)
1st June 2026
28AQI (US)
2nd June 2026
34AQI (US)
3rd June 2026
21AQI (US)
4th June 2026
14AQI (US)
5th June 2026
21AQI (US)
6th June 2026
22AQI (US)
7th June 2026
21AQI (US)
8th June 2026
20AQI (US)
9th June 2026
22AQI (US)
10th June 2026
22AQI (US)
11th June 2026
25AQI (US)
12th June 2026
24AQI (US)
13th June 2026
26AQI (US)
14th June 2026
32AQI (US)
15th June 2026
18AQI (US)
16th June 2026
18AQI (US)
17th June 2026
24AQI (US)
18th June 2026
26AQI (US)
19th June 2026
28AQI (US)
20th June 2026
22AQI (US)
21st June 2026
14AQI (US)
22nd June 2026
19AQI (US)
23rd June 2026
21AQI (US)
24th June 2026
21AQI (US)
25th June 2026
26AQI (US)
26th June 2026
29AQI (US)
27th June 2026
26AQI (US)
28th June 2026
28AQI (US)
29th June 2026
27AQI (US)
30th June 2026
24AQI (US)
1st July 2026
26AQI (US)
2nd July 2026
18AQI (US)
3rd July 2026
11AQI (US)
4th July 2026
32AQI (US)
5th July 2026
29AQI (US)
6th July 2026
23AQI (US)
7th July 2026
25AQI (US)
8th July 2026
25AQI (US)
9th July 2026
26AQI (US)
10th July 2026
28AQI (US)
11th July 2026
32AQI (US)
12th July 2026
28AQI (US)
13th July 2026
27AQI (US)
14th July 2026
42AQI (US)
15th July 2026
54AQI (US)
16th July 2026
46AQI (US)
17th July 2026
49AQI (US)
18th July 2026
23AQI (US)
19th July 2026
28AQI (US)
20th July 2026
36AQI (US)
21st July 2026
47AQI (US)
22nd July 2026
60AQI (US)
23rd July 2026
46AQI (US)
24th July 2026
40AQI (US)
25th July 2026
30AQI (US)
26th July 2026
30AQI (US)
27th July 2026
29AQI (US)
28th July 2026
34AQI (US)
29th July 2026
35AQI (US)
30th July 2026
30AQI (US)
31st July 2026
34AQI (US)
1st August 2026
38AQI (US)
2nd August 2026
40AQI (US)
3rd August 2026
18AQI (US)
4th August 2026
24AQI (US)
5th August 2026
28AQI (US)
6th August 2026
30AQI (US)
7th August 2026
33AQI (US)
8th August 2026
28AQI (US)
9th August 2026
30AQI (US)
10th August 2026
30AQI (US)
11th August 2026
31AQI (US)
12th August 2026
30AQI (US)
13th August 2026
32AQI (US)
14th August 2026
29AQI (US)
15th August 2026
31AQI (US)
16th August 2026
34AQI (US)
17th August 2026
31AQI (US)
18th August 2026
32AQI (US)
19th August 2026
34AQI (US)
20th August 2026
40AQI (US)
21st August 2026
31AQI (US)
22nd August 2026
30AQI (US)
23rd August 2026
33AQI (US)
24th August 2026
40AQI (US)
25th August 2026
50AQI (US)
26th August 2026
45AQI (US)
27th August 2026
20AQI (US)
28th August 2026
23AQI (US)
29th August 2026
30AQI (US)
30th August 2026
31AQI (US)
31st August 2026
31AQI (US)
1st September 2026
31AQI (US)
2nd September 2026
30AQI (US)
3rd September 2026
32AQI (US)
4th September 2026
26AQI (US)
5th September 2026
31AQI (US)
6th September 2026
31AQI (US)
7th September 2026
28AQI (US)
8th September 2026
29AQI (US)
9th September 2026
31AQI (US)
10th September 2026
33AQI (US)
11th September 2026
32AQI (US)
12th September 2026
36AQI (US)
13th September 2026
30AQI (US)
14th September 2026
34AQI (US)
15th September 2026
30AQI (US)
16th September 2026
36AQI (US)
17th September 2026
35AQI (US)
18th September 2026
34AQI (US)
19th September 2026
39AQI (US)
20th September 2026
36AQI (US)
21st September 2026
36AQI (US)
22nd September 2026
36AQI (US)
23rd September 2026
33AQI (US)
24th September 2026
38AQI (US)
25th September 2026
36AQI (US)
26th September 2026
33AQI (US)
27th September 2026
28AQI (US)
28th September 2026
38AQI (US)
29th September 2026
42AQI (US)
30th September 2026
37AQI (US)
1st October 2026
34AQI (US)
2nd October 2026
41AQI (US)
3rd October 2026
47AQI (US)
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

27AQI (US)

37AQI (US)

51AQI (US)

36AQI (US)

42AQI (US)

23AQI (US)

33AQI (US)

32AQI (US)

33AQI (US)

41AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202635AQI (US)

31
25
3
13
18
30
22
9
30
29
2
31
30
3
244
32

Highest AQI (US) recorded in

March

51AQI (US)

Lowest AQI (US) recorded in

June

23AQI (US)

202539AQI (US)

31
28
26
5
26
4
27
4
25
5
16
15
24
7
30
19
12
24
6
28
3
304
61

Highest AQI (US) recorded in

July

50AQI (US)

Lowest AQI (US) recorded in

January

29AQI (US)

202432AQI (US)

31
29
29
1
22
7
31
28
2
29
2
31
27
3
31
29
1
31
348
16

Highest AQI (US) recorded in

April

42AQI (US)

Lowest AQI (US) recorded in

January

21AQI (US)

202335AQI (US)

12
1
27
4
27
3
20
11
28
3
29
1
31
27
2
31
232
25

Highest AQI (US) recorded in

July

47AQI (US)

Lowest AQI (US) recorded in

December

18AQI (US)

202236AQI (US)

31
21
27
4
16
1
25
6
18
12
16
5
1
27
1
29
2
12
223
31

Highest AQI (US) recorded in

August

48AQI (US)

Lowest AQI (US) recorded in

October

28AQI (US)

202132AQI (US)

29
2
26
2
29
21
29
2
24
6
26
5
28
3
28
2
30
1
29
1
31
330
24

Highest AQI (US) recorded in

June

42AQI (US)

Lowest AQI (US) recorded in

January

23AQI (US)

202032AQI (US)

12
1
20
1
18
25
5
29
2
13
18
19
28
3
27
3
31
222
33

Highest AQI (US) recorded in

August

55AQI (US)

Lowest AQI (US) recorded in

December

19AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2025(Avg.)
39AQI (US)
Least Polluted Year Recorded
2020(Avg.)
32AQI (US)

Nikko's annual 2026 AQI (US) (35) shows an average percentage change of 2.5% (worsened AQI (US)) compared to previous years: 2020 (32), 2021 (32), 2022 (36), 2023 (35), 2024 (32), 2025 (39).