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Tomioka, Japan climate
Cfa Humid subtropical
Tomioka has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 88°F, while the coldest is January averaging around 27°F at night. Precipitation totals about 53 inches a year and is strongly seasonal — August alone averages 8.7 inches while December barely receives 0.93 inches.
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)Tomioka climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 49 | 50 | 57 | 67 | 75 | 80 | 86 | 88 | 81 | 71 | 62 | 53 |
| Avg temp (°F) | 37 | 38 | 45 | 55 | 64 | 70 | 77 | 78 | 71 | 61 | 50 | 41 |
| Avg low (°F) | 27 | 28 | 34 | 43 | 53 | 62 | 69 | 71 | 64 | 53 | 41 | 31 |
| Precipitation (in) | 1.1 | 1.1 | 2.4 | 3.1 | 4.4 | 6.8 | 8.7 | 8.7 | 8.4 | 5.8 | 1.8 | 0.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 49 | 50 | 57 | 67 | 75 | 80 |
| Avg temp (°F) | 37 | 38 | 45 | 55 | 64 | 70 |
| Avg low (°F) | 27 | 28 | 34 | 43 | 53 | 62 |
| Precipitation (in) | 1.1 | 1.1 | 2.4 | 3.1 | 4.4 | 6.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 86 | 88 | 81 | 71 | 62 | 53 |
| Avg temp (°F) | 77 | 78 | 71 | 61 | 50 | 41 |
| Avg low (°F) | 69 | 71 | 64 | 53 | 41 | 31 |
| Precipitation (in) | 8.7 | 8.7 | 8.4 | 5.8 | 1.8 | 0.9 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 63 | 64 | 65 | 65 | 69 | 81 | 79 | 70 | 75 | 70 | 62 | 61 |
| Relative humidity (%) | 93 | 92 | 86 | 81 | 80 | 84 | 86 | 86 | 88 | 88 | 89 | 91 |
| Wind speed (mph) | 6.1 | 6.4 | 6.1 | 5.2 | 4.2 | 3.2 | 2.9 | 2.9 | 3.4 | 3.7 | 4.1 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 63 | 64 | 65 | 65 | 69 | 81 |
| Relative humidity (%) | 93 | 92 | 86 | 81 | 80 | 84 |
| Wind speed (mph) | 6.1 | 6.4 | 6.1 | 5.2 | 4.2 | 3.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 70 | 75 | 70 | 62 | 61 |
| Relative humidity (%) | 86 | 86 | 88 | 88 | 89 | 91 |
| Wind speed (mph) | 2.9 | 2.9 | 3.4 | 3.7 | 4.1 | 5.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kamisatomi, about 14 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.