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Kusatsu, Japan climate
Cfa Humid subtropical
Kusatsu has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 93°F, while the coldest is January averaging around 35°F at night. Precipitation totals about 60 inches a year and is strongly seasonal — July alone averages 8.8 inches while January barely receives 2.10 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)Kusatsu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 50 | 57 | 68 | 77 | 83 | 90 | 93 | 85 | 74 | 63 | 53 |
| Avg temp (°F) | 41 | 42 | 48 | 58 | 67 | 74 | 81 | 83 | 76 | 65 | 55 | 45 |
| Avg low (°F) | 35 | 35 | 40 | 49 | 58 | 67 | 74 | 76 | 69 | 58 | 47 | 38 |
| Precipitation (in) | 2.1 | 2.6 | 4.2 | 4.6 | 6.0 | 7.9 | 8.8 | 6.1 | 7.0 | 5.6 | 2.9 | 2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 48 | 50 | 57 | 68 | 77 | 83 |
| Avg temp (°F) | 41 | 42 | 48 | 58 | 67 | 74 |
| Avg low (°F) | 35 | 35 | 40 | 49 | 58 | 67 |
| Precipitation (in) | 2.1 | 2.6 | 4.2 | 4.6 | 6.0 | 7.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 90 | 93 | 85 | 74 | 63 | 53 |
| Avg temp (°F) | 81 | 83 | 76 | 65 | 55 | 45 |
| Avg low (°F) | 74 | 76 | 69 | 58 | 47 | 38 |
| Precipitation (in) | 8.8 | 6.1 | 7.0 | 5.6 | 2.9 | 2.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 84 | 81 | 75 | 69 | 71 | 81 | 77 | 66 | 74 | 70 | 74 | 80 |
| Relative humidity (%) | 85 | 83 | 81 | 79 | 81 | 84 | 86 | 84 | 85 | 84 | 84 | 85 |
| Wind speed (mph) | 6.3 | 6.6 | 6.7 | 6.0 | 5.2 | 4.6 | 4.5 | 4.4 | 4.9 | 5.1 | 5.1 | 5.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 84 | 81 | 75 | 69 | 71 | 81 |
| Relative humidity (%) | 85 | 83 | 81 | 79 | 81 | 84 |
| Wind speed (mph) | 6.3 | 6.6 | 6.7 | 6.0 | 5.2 | 4.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 66 | 74 | 70 | 74 | 80 |
| Relative humidity (%) | 86 | 84 | 85 | 84 | 84 | 85 |
| Wind speed (mph) | 4.5 | 4.4 | 4.9 | 5.1 | 5.1 | 5.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kyoto, about 21 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.