Nikkō, Japan climate
Cfa Humid subtropical
Nikkō has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 28°C, while the coldest is January averaging around −4°C at night. Precipitation totals about 1952 mm a year and is strongly seasonal — August alone averages 302 mm while February barely receives 41 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Nikkō climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 6 | 7 | 11 | 16 | 21 | 23 | 27 | 28 | 24 | 19 | 14 | 9 |
| Avg temp (°C) | 1 | 1 | 5 | 10 | 15 | 19 | 22 | 23 | 20 | 14 | 8 | 3 |
| Avg low (°C) | −4 | −3 | −1 | 5 | 10 | 15 | 19 | 20 | 16 | 10 | 4 | −1 |
| Precipitation (mm) | 49 | 41 | 99 | 134 | 168 | 225 | 286 | 302 | 299 | 218 | 85 | 45 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 6 | 7 | 11 | 16 | 21 | 23 |
| Avg temp (°C) | 1 | 1 | 5 | 10 | 15 | 19 |
| Avg low (°C) | −4 | −3 | −1 | 5 | 10 | 15 |
| Precipitation (mm) | 49 | 41 | 99 | 134 | 168 | 225 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 28 | 24 | 19 | 14 | 9 |
| Avg temp (°C) | 22 | 23 | 20 | 14 | 8 | 3 |
| Avg low (°C) | 19 | 20 | 16 | 10 | 4 | −1 |
| Precipitation (mm) | 286 | 302 | 299 | 218 | 85 | 45 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 60 | 65 | 71 | 82 | 81 | 72 | 75 | 68 | 55 | 49 |
| Relative humidity (%) | 82 | 80 | 77 | 75 | 76 | 80 | 82 | 82 | 83 | 83 | 82 | 82 |
| Wind speed (m/s) | 2.6 | 2.7 | 2.6 | 2.3 | 1.9 | 1.6 | 1.5 | 1.4 | 1.6 | 1.7 | 1.8 | 2.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 60 | 65 | 71 | 82 |
| Relative humidity (%) | 82 | 80 | 77 | 75 | 76 | 80 |
| Wind speed (m/s) | 2.6 | 2.7 | 2.6 | 2.3 | 1.9 | 1.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 72 | 75 | 68 | 55 | 49 |
| Relative humidity (%) | 82 | 82 | 83 | 83 | 82 | 82 |
| Wind speed (m/s) | 1.5 | 1.4 | 1.6 | 1.7 | 1.8 | 2.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Imaichi, about 6 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.