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Ōtawara, Japan climate
Cfa Humid subtropical
Ōtawara has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 86°F, while the coldest is January averaging around 26°F at night. Precipitation totals about 60 inches a year and is strongly seasonal — July alone averages 9.3 inches while February barely receives 1.37 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)Ōtawara climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 47 | 54 | 64 | 72 | 77 | 83 | 86 | 79 | 69 | 59 | 50 |
| Avg temp (°F) | 35 | 37 | 43 | 52 | 62 | 68 | 74 | 76 | 69 | 59 | 48 | 39 |
| Avg low (°F) | 26 | 27 | 32 | 42 | 53 | 61 | 68 | 69 | 62 | 51 | 38 | 30 |
| Precipitation (in) | 1.4 | 1.4 | 3.3 | 4.3 | 5.5 | 6.8 | 9.3 | 9.3 | 8.3 | 6.3 | 2.8 | 1.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 45 | 47 | 54 | 64 | 72 | 77 |
| Avg temp (°F) | 35 | 37 | 43 | 52 | 62 | 68 |
| Avg low (°F) | 26 | 27 | 32 | 42 | 53 | 61 |
| Precipitation (in) | 1.4 | 1.4 | 3.3 | 4.3 | 5.5 | 6.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 83 | 86 | 79 | 69 | 59 | 50 |
| Avg temp (°F) | 74 | 76 | 69 | 59 | 48 | 39 |
| Avg low (°F) | 68 | 69 | 62 | 51 | 38 | 30 |
| Precipitation (in) | 9.3 | 9.3 | 8.3 | 6.3 | 2.8 | 1.6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 62 | 65 | 66 | 70 | 80 | 78 | 68 | 74 | 69 | 62 | 57 |
| Relative humidity (%) | 85 | 83 | 81 | 79 | 79 | 82 | 84 | 84 | 86 | 86 | 86 | 86 |
| Wind speed (mph) | 2.7 | 3.1 | 3.0 | 2.4 | 1.7 | 1.3 | 1.1 | 1.1 | 1.2 | 1.4 | 1.6 | 2.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 62 | 65 | 66 | 70 | 80 |
| Relative humidity (%) | 85 | 83 | 81 | 79 | 79 | 82 |
| Wind speed (mph) | 2.7 | 3.1 | 3.0 | 2.4 | 1.7 | 1.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 68 | 74 | 69 | 62 | 57 |
| Relative humidity (%) | 84 | 84 | 86 | 86 | 86 | 86 |
| Wind speed (mph) | 1.1 | 1.1 | 1.2 | 1.4 | 1.6 | 2.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Otawara, about 3 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.