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Sumoto, Japan climate
Cfa Humid subtropical
Sumoto has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around 2°C at night. Precipitation totals about 1560 mm a year and is strongly seasonal — September alone averages 224 mm while January barely receives 48 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)Sumoto climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 14 | 20 | 24 | 26 | 31 | 32 | 28 | 23 | 17 | 12 |
| Avg temp (°C) | 6 | 6 | 9 | 14 | 19 | 22 | 27 | 28 | 24 | 18 | 13 | 8 |
| Avg low (°C) | 2 | 2 | 4 | 9 | 14 | 19 | 23 | 24 | 21 | 15 | 9 | 4 |
| Precipitation (mm) | 48 | 67 | 109 | 118 | 145 | 198 | 182 | 117 | 224 | 186 | 91 | 75 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 14 | 20 | 24 | 26 |
| Avg temp (°C) | 6 | 6 | 9 | 14 | 19 | 22 |
| Avg low (°C) | 2 | 2 | 4 | 9 | 14 | 19 |
| Precipitation (mm) | 48 | 67 | 109 | 118 | 145 | 198 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 32 | 28 | 23 | 17 | 12 |
| Avg temp (°C) | 27 | 28 | 24 | 18 | 13 | 8 |
| Avg low (°C) | 23 | 24 | 21 | 15 | 9 | 4 |
| Precipitation (mm) | 182 | 117 | 224 | 186 | 91 | 75 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 77 | 75 | 74 | 76 | 79 | 83 | 85 | 83 | 80 | 77 | 76 | 77 |
| Wind speed (mph) | 8.8 | 8.6 | 8.1 | 6.7 | 5.3 | 4.6 | 4.6 | 5.0 | 6.2 | 7.0 | 7.1 | 8.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 |
| Relative humidity (%) | 77 | 75 | 74 | 76 | 79 | 83 |
| Wind speed (mph) | 8.8 | 8.6 | 8.1 | 6.7 | 5.3 | 4.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 85 | 83 | 80 | 77 | 76 | 77 |
| Wind speed (mph) | 4.6 | 5.0 | 6.2 | 7.0 | 7.1 | 8.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Sumoto, about 5 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.