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Tōkamachi, Japan climate
Cfa Humid subtropical
Tōkamachi has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 30°C, while the coldest is January averaging around −3°C at night. Around 2551 mm of precipitation falls each year, peaking in December (398 mm) and easing off in May (101 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)Tōkamachi climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 4 | 8 | 15 | 22 | 25 | 29 | 30 | 26 | 20 | 13 | 6 |
| Avg temp (°C) | 0 | 0 | 3 | 9 | 16 | 20 | 24 | 25 | 21 | 14 | 8 | 3 |
| Avg low (°C) | −3 | −3 | −1 | 4 | 10 | 16 | 20 | 21 | 17 | 10 | 4 | 0 |
| Precipitation (mm) | 392 | 262 | 178 | 111 | 101 | 136 | 221 | 183 | 169 | 167 | 234 | 398 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 4 | 8 | 15 | 22 | 25 |
| Avg temp (°C) | 0 | 0 | 3 | 9 | 16 | 20 |
| Avg low (°C) | −3 | −3 | −1 | 4 | 10 | 16 |
| Precipitation (mm) | 392 | 262 | 178 | 111 | 101 | 136 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 26 | 20 | 13 | 6 |
| Avg temp (°C) | 24 | 25 | 21 | 14 | 8 | 3 |
| Avg low (°C) | 20 | 21 | 17 | 10 | 4 | 0 |
| Precipitation (mm) | 221 | 183 | 169 | 167 | 234 | 398 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 85 | 78 | 69 | 68 | 76 | 77 | 66 | 73 | 71 | 76 | 86 |
| Relative humidity (%) | 98 | 97 | 90 | 81 | 78 | 82 | 85 | 84 | 86 | 87 | 90 | 95 |
| Wind speed (mph) | 1.9 | 2.7 | 2.1 | 1.1 | 0.4 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 85 | 78 | 69 | 68 | 76 |
| Relative humidity (%) | 98 | 97 | 90 | 81 | 78 | 82 |
| Wind speed (mph) | 1.9 | 2.7 | 2.1 | 1.1 | 0.4 | 0.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 66 | 73 | 71 | 76 | 86 |
| Relative humidity (%) | 85 | 84 | 86 | 87 | 90 | 95 |
| Wind speed (mph) | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.8 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Tokamachi, about 4 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.