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Shimo-tsuma, Japan climate
Cfa Humid subtropical
Shimo-tsuma has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 89°F, while the coldest is January averaging around 26°F at night. Precipitation totals about 48 inches a year and is strongly seasonal — October alone averages 7.2 inches while February barely receives 1.51 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)Shimo-tsuma climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 50 | 57 | 66 | 74 | 79 | 85 | 89 | 82 | 71 | 61 | 52 |
| Avg temp (°F) | 37 | 39 | 46 | 55 | 64 | 70 | 77 | 79 | 72 | 62 | 51 | 41 |
| Avg low (°F) | 26 | 29 | 35 | 44 | 56 | 63 | 70 | 72 | 65 | 54 | 41 | 31 |
| Precipitation (in) | 1.6 | 1.5 | 3.0 | 4.2 | 4.6 | 4.5 | 5.7 | 4.8 | 5.9 | 7.2 | 2.7 | 1.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 50 | 57 | 66 | 74 | 79 |
| Avg temp (°F) | 37 | 39 | 46 | 55 | 64 | 70 |
| Avg low (°F) | 26 | 29 | 35 | 44 | 56 | 63 |
| Precipitation (in) | 1.6 | 1.5 | 3.0 | 4.2 | 4.6 | 4.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 89 | 82 | 71 | 61 | 52 |
| Avg temp (°F) | 77 | 79 | 72 | 62 | 51 | 41 |
| Avg low (°F) | 70 | 72 | 65 | 54 | 41 | 31 |
| Precipitation (in) | 5.7 | 4.8 | 5.9 | 7.2 | 2.7 | 1.9 |
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 (%) | 77 | 76 | 75 | 76 | 77 | 81 | 83 | 82 | 84 | 83 | 81 | 79 |
| Wind speed (mph) | 3.0 | 3.3 | 3.5 | 3.6 | 3.1 | 2.8 | 2.6 | 2.5 | 2.7 | 2.6 | 2.5 | 2.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 60 | 65 | 71 | 82 |
| Relative humidity (%) | 77 | 76 | 75 | 76 | 77 | 81 |
| Wind speed (mph) | 3.0 | 3.3 | 3.5 | 3.6 | 3.1 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 81 | 72 | 75 | 68 | 55 | 49 |
| Relative humidity (%) | 83 | 82 | 84 | 83 | 81 | 79 |
| Wind speed (mph) | 2.6 | 2.5 | 2.7 | 2.6 | 2.5 | 2.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Shimodate, about 11 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.