Nikko weather in September
In September, Nikko sees average daytime highs of 21°C and overnight lows near 15°C, with 269 mm of rain across 20.1 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.
Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 14% of the time in September, and the air most often feels humid.
Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Nikko's 9th-clearest and 9th-windiest month. For the whole year in context, see Nikko's year-round climate.
- Daytime high
- 21°
- 3rd warmest
- Overnight low
- 15°
- 10th coldest
- Rainfall
- 269 mm
- 20.1 wet days
- Daylight
- 12 h 12 min
- 5:29 AM – 5:43 PM
- Cloud cover
- 73%
- 9th clearest
- Wind
- 5 km/h
- 9th windiest
- Solar energy
- 3.62 kWh/m²
- Travel score
- 4.7
- out of 10
Nikko is city in Tochigi prefecture, Japan.
- Density
- 54/km²
- people per km²
- Founded
- ~800 CE
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 23°C in the first days to 19°C by the end.
A typical September day in Nikko reaches about 21°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 |
| Avg low (°C) | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 24 | 18 |
| 2 | 23 | 17 |
| 3 | 23 | 17 |
| 4 | 23 | 17 |
| 5 | 23 | 17 |
| 6 | 23 | 17 |
| 7 | 23 | 17 |
| 8 | 23 | 17 |
| 9 | 23 | 16 |
| 10 | 22 | 16 |
| 11 | 22 | 16 |
| 12 | 22 | 16 |
| 13 | 22 | 16 |
| 14 | 22 | 15 |
| 15 | 21 | 15 |
| 16 | 21 | 15 |
| 17 | 21 | 15 |
| 18 | 21 | 15 |
| 19 | 21 | 14 |
| 20 | 20 | 14 |
| 21 | 20 | 14 |
| 22 | 20 | 14 |
| 23 | 20 | 13 |
| 24 | 20 | 13 |
| 25 | 19 | 13 |
| 26 | 19 | 13 |
| 27 | 19 | 13 |
| 28 | 19 | 12 |
| 29 | 19 | 12 |
| 30 | 19 | 12 |
How September really feels in Nikko
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Nikko weather by month
How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 1° / -6° | 62 | 9.6 | 11.6 | 9.8 | 0.0 |
| Feb | 2° / -5° | 58 | 9.5 | 9.6 | 10.6 | 0.0 |
| Mar | 6° / -2° | 112 | 14 | 9.6 | 11.7 | 0.5 |
| Apr | 12° / 3° | 137 | 15.1 | 2.8 | 12.9 | 2.8 |
| May | 17° / 9° | 176 | 17.1 | 0.1 | 13.9 | 4.5 |
| Jun | 20° / 14° | 228 | 22.2 | 0 | 14.5 | 4.3 |
| Jul | 24° / 18° | 305 | 25.4 | 0 | 14.3 | 4.3 |
| Aug | 25° / 19° | 259 | 25 | 0 | 13.4 | 4.5 |
| Sep | 21° / 15° | 269 | 20.1 | 0 | 12.2 | 4.7 |
| Oct | 16° / 9° | 198 | 16.6 | 0.1 | 11.1 | 4.1 |
| Nov | 10° / 2° | 84 | 9.4 | 1.1 | 10 | 2.3 |
| Dec | 4° / -3° | 59 | 10.1 | 7.8 | 9.5 | 0.1 |
Cloud cover in September
The sky is clear or mostly clear about 14% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 71%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 28 | 28 | 27 | 27 | 28 | 28 | 27 | 27 | 26 | 27 | 27 | 27 | 26 | 27 | 27 | 28 | 28 | 27 | 27 | 28 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 33 | 34 | 34 |
| Cloudier (%) | 72 | 72 | 73 | 73 | 72 | 72 | 73 | 73 | 74 | 73 | 73 | 73 | 74 | 73 | 73 | 72 | 72 | 73 | 73 | 72 | 71 | 70 | 70 | 70 | 69 | 69 | 68 | 67 | 66 | 66 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 28 | 72 |
| 2 | 28 | 72 |
| 3 | 27 | 73 |
| 4 | 27 | 73 |
| 5 | 28 | 72 |
| 6 | 28 | 72 |
| 7 | 27 | 73 |
| 8 | 27 | 73 |
| 9 | 26 | 74 |
| 10 | 27 | 73 |
| 11 | 27 | 73 |
| 12 | 27 | 73 |
| 13 | 26 | 74 |
| 14 | 27 | 73 |
| 15 | 27 | 73 |
| 16 | 28 | 72 |
| 17 | 28 | 72 |
| 18 | 27 | 73 |
| 19 | 27 | 73 |
| 20 | 28 | 72 |
| 21 | 29 | 71 |
| 22 | 30 | 70 |
| 23 | 30 | 70 |
| 24 | 30 | 70 |
| 25 | 31 | 69 |
| 26 | 31 | 69 |
| 27 | 32 | 68 |
| 28 | 33 | 67 |
| 29 | 34 | 66 |
| 30 | 34 | 66 |
Chance of precipitation in September
Nikko gets around 269 mm of rain over 20.1 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 68% and peaks near 75% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 75 | 74 | 74 | 73 | 73 | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 70 | 70 | 69 | 69 | 68 | 68 | 67 | 67 | 66 | 65 | 64 | 64 | 63 | 63 | 63 | 63 | 62 | 62 |
| Rain chance (%) | |
|---|---|
| 1 | 75 |
| 2 | 74 |
| 3 | 74 |
| 4 | 73 |
| 5 | 73 |
| 6 | 72 |
| 7 | 72 |
| 8 | 72 |
| 9 | 71 |
| 10 | 71 |
| 11 | 71 |
| 12 | 71 |
| 13 | 70 |
| 14 | 70 |
| 15 | 69 |
| 16 | 69 |
| 17 | 68 |
| 18 | 68 |
| 19 | 67 |
| 20 | 67 |
| 21 | 66 |
| 22 | 65 |
| 23 | 64 |
| 24 | 64 |
| 25 | 63 |
| 26 | 63 |
| 27 | 63 |
| 28 | 63 |
| 29 | 62 |
| 30 | 62 |
Humidity in September
Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 15 | 16 | 18 | 20 | 23 | 25 | 28 | 30 | 33 | 36 | 39 | 42 | 44 | 47 | 50 | 53 | 55 | 58 | 61 |
| Comfortable (%) | 18 | 19 | 20 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 32 | 33 | 33 | 34 | 34 | 34 | 34 | 33 | 33 | 33 | 32 | 31 | 30 | 29 |
| Humid (%) | 40 | 41 | 41 | 41 | 41 | 41 | 40 | 40 | 39 | 38 | 37 | 37 | 36 | 34 | 33 | 32 | 30 | 29 | 27 | 26 | 24 | 22 | 20 | 18 | 17 | 15 | 13 | 12 | 11 | 9 |
| Muggy (%) | 37 | 36 | 34 | 33 | 31 | 30 | 28 | 27 | 25 | 24 | 22 | 20 | 19 | 17 | 15 | 14 | 12 | 10 | 9 | 8 | 6 | 5 | 5 | 4 | 3 | 2 | 2 | 2 | 1 | 1 |
| Oppressive (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 3 | 18 | 40 | 37 | 1 |
| 2 | 3 | 19 | 41 | 36 | 1 |
| 3 | 4 | 20 | 41 | 34 | 1 |
| 4 | 5 | 20 | 41 | 33 | 1 |
| 5 | 6 | 21 | 41 | 31 | 1 |
| 6 | 7 | 22 | 41 | 30 | 1 |
| 7 | 8 | 23 | 40 | 28 | 1 |
| 8 | 9 | 24 | 40 | 27 | 1 |
| 9 | 10 | 25 | 39 | 25 | 0 |
| 10 | 11 | 26 | 38 | 24 | 0 |
| 11 | 13 | 27 | 37 | 22 | 0 |
| 12 | 15 | 28 | 37 | 20 | 0 |
| 13 | 16 | 29 | 36 | 19 | 0 |
| 14 | 18 | 30 | 34 | 17 | 0 |
| 15 | 20 | 31 | 33 | 15 | 0 |
| 16 | 23 | 32 | 32 | 14 | 0 |
| 17 | 25 | 32 | 30 | 12 | 0 |
| 18 | 28 | 33 | 29 | 10 | 0 |
| 19 | 30 | 33 | 27 | 9 | 0 |
| 20 | 33 | 34 | 26 | 8 | 0 |
| 21 | 36 | 34 | 24 | 6 | 0 |
| 22 | 39 | 34 | 22 | 5 | 0 |
| 23 | 42 | 34 | 20 | 5 | 0 |
| 24 | 44 | 33 | 18 | 4 | 0 |
| 25 | 47 | 33 | 17 | 3 | 0 |
| 26 | 50 | 33 | 15 | 2 | 0 |
| 27 | 53 | 32 | 13 | 2 | 0 |
| 28 | 55 | 31 | 12 | 2 | 0 |
| 29 | 58 | 30 | 11 | 1 | 0 |
| 30 | 61 | 29 | 9 | 1 | 0 |
Wind in September
Winds average 5 km/h in September.
Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 5 | calm |
| 2 | 5 | calm |
| 3 | 5 | calm |
| 4 | 5 | calm |
| 5 | 5 | calm |
| 6 | 5 | calm |
| 7 | 5 | calm |
| 8 | 5 | calm |
| 9 | 5 | calm |
| 10 | 5 | calm |
| 11 | 5 | calm |
| 12 | 5 | calm |
| 13 | 5 | calm |
| 14 | 5 | calm |
| 15 | 5 | calm |
| 16 | 5 | calm |
| 17 | 5 | calm |
| 18 | 5 | calm |
| 19 | 5 | calm |
| 20 | 5 | calm |
| 21 | 5 | calm |
| 22 | 5 | calm |
| 23 | 5 | calm |
| 24 | 5 | calm |
| 25 | 5 | calm |
| 26 | 5 | calm |
| 27 | 5 | calm |
| 28 | 5 | calm |
| 29 | 5 | calm |
| 30 | 5 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over September. Sunrise moves from 5:17 AM to 5:41 AM, and sunset from 6:06 PM to 5:21 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.7 |
| Sunrise (AM) | 5:17 | 5:17 | 5:18 | 5:19 | 5:20 | 5:21 | 5:22 | 5:22 | 5:23 | 5:24 | 5:25 | 5:26 | 5:26 | 5:27 | 5:28 | 5:29 | 5:30 | 5:31 | 5:31 | 5:32 | 5:33 | 5:34 | 5:35 | 5:36 | 5:36 | 5:37 | 5:38 | 5:39 | 5:40 | 5:41 |
| Sunset (PM) | 6:06 | 6:04 | 6:03 | 6:01 | 6:00 | 5:58 | 5:57 | 5:55 | 5:54 | 5:52 | 5:51 | 5:49 | 5:47 | 5:46 | 5:44 | 5:43 | 5:41 | 5:40 | 5:38 | 5:36 | 5:35 | 5:33 | 5:32 | 5:30 | 5:29 | 5:27 | 5:26 | 5:24 | 5:22 | 5:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.8 | 5:17 | 6:06 |
| 2 | 12.8 | 5:17 | 6:04 |
| 3 | 12.7 | 5:18 | 6:03 |
| 4 | 12.7 | 5:19 | 6:01 |
| 5 | 12.7 | 5:20 | 6:00 |
| 6 | 12.6 | 5:21 | 5:58 |
| 7 | 12.6 | 5:22 | 5:57 |
| 8 | 12.5 | 5:22 | 5:55 |
| 9 | 12.5 | 5:23 | 5:54 |
| 10 | 12.5 | 5:24 | 5:52 |
| 11 | 12.4 | 5:25 | 5:51 |
| 12 | 12.4 | 5:26 | 5:49 |
| 13 | 12.4 | 5:26 | 5:47 |
| 14 | 12.3 | 5:27 | 5:46 |
| 15 | 12.3 | 5:28 | 5:44 |
| 16 | 12.2 | 5:29 | 5:43 |
| 17 | 12.2 | 5:30 | 5:41 |
| 18 | 12.2 | 5:31 | 5:40 |
| 19 | 12.1 | 5:31 | 5:38 |
| 20 | 12.1 | 5:32 | 5:36 |
| 21 | 12.0 | 5:33 | 5:35 |
| 22 | 12.0 | 5:34 | 5:33 |
| 23 | 11.9 | 5:35 | 5:32 |
| 24 | 11.9 | 5:36 | 5:30 |
| 25 | 11.9 | 5:36 | 5:29 |
| 26 | 11.8 | 5:37 | 5:27 |
| 27 | 11.8 | 5:38 | 5:26 |
| 28 | 11.7 | 5:39 | 5:24 |
| 29 | 11.7 | 5:40 | 5:22 |
| 30 | 11.7 | 5:41 | 5:21 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 3.62 kWh/m².
For context, solar energy here swings from a low near 2.26 kWh/m² to a high of 5.28 kWh/m² in May across the year — September's 3.62 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.0 | 4.0 | 4.0 | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.7 | 3.6 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.2 |
| Level | Bright | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.0 | Bright |
| 2 | 4.0 | Moderate |
| 3 | 4.0 | Moderate |
| 4 | 3.9 | Moderate |
| 5 | 3.9 | Moderate |
| 6 | 3.9 | Moderate |
| 7 | 3.8 | Moderate |
| 8 | 3.8 | Moderate |
| 9 | 3.8 | Moderate |
| 10 | 3.7 | Moderate |
| 11 | 3.7 | Moderate |
| 12 | 3.7 | Moderate |
| 13 | 3.6 | Moderate |
| 14 | 3.6 | Moderate |
| 15 | 3.6 | Moderate |
| 16 | 3.6 | Moderate |
| 17 | 3.5 | Moderate |
| 18 | 3.5 | Moderate |
| 19 | 3.5 | Moderate |
| 20 | 3.5 | Moderate |
| 21 | 3.4 | Moderate |
| 22 | 3.4 | Moderate |
| 23 | 3.4 | Moderate |
| 24 | 3.4 | Moderate |
| 25 | 3.3 | Moderate |
| 26 | 3.3 | Moderate |
| 27 | 3.3 | Moderate |
| 28 | 3.3 | Moderate |
| 29 | 3.3 | Moderate |
| 30 | 3.2 | Moderate |
Hazard calendar for Nikko
In September, Nikko sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Nikko's rainy season runs May–October, when most of the year's rain falls.
Is September a good time to visit Nikko?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Nikko for sightseeing.
What to pack for Nikko in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Nikko sees daytime highs around 21°C and nights near 15°C. Pack rain gear. About 20 days see rain.
UV index in Nikko in September
Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nikko peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 4 | 5 | 7 | 9 | 9 | 10 | 9 | 9 | 6 | 3 | 2 |
| Level | Moderate | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | High |
| Apr | 7 | High |
| May | 9 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Nikko in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Nikko is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 13 | 19 | 21 | 20 | 16 | 14 | 13 | 11 | 11 | 10 | 9 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 19 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 16 | Moderate |
| Jul | 14 | Moderate |
| Aug | 13 | Moderate |
| Sep | 11 | Good |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Nikko?
Nikko sits at 36.8°N, 139.6°E, 555 m above sea level, in Japan. The nearest listed city is Imaichi, 7.0 km away.
Topography around Nikko
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nikko.
Within 3 km, the terrain around Nikko has large variations in elevation — a maximum elevation change of 635 m around an average of 673 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,272 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,551 m.
The land around Nikko is covered by trees (88%) within 3 km, trees (87%) within 16 km, and trees (72%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nikko (36.75°, 139.6167°, elevation 555 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).