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Azumino, Japan climate
Cfa Humid subtropical
Azumino has a strongly seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 31°C, while the coldest is January averaging around −5°C at night. Precipitation totals about 1109 mm a year and is strongly seasonal — September alone averages 156 mm while December barely receives 38 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)Azumino climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 11 | 18 | 23 | 26 | 30 | 31 | 26 | 20 | 14 | 7 |
| Avg temp (°C) | −1 | 0 | 4 | 10 | 16 | 20 | 24 | 25 | 20 | 14 | 7 | 2 |
| Avg low (°C) | −5 | −5 | −1 | 4 | 10 | 15 | 20 | 20 | 16 | 9 | 2 | −3 |
| Precipitation (mm) | 45 | 45 | 84 | 83 | 96 | 124 | 145 | 107 | 156 | 127 | 58 | 38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 6 | 11 | 18 | 23 | 26 |
| Avg temp (°C) | −1 | 0 | 4 | 10 | 16 | 20 |
| Avg low (°C) | −5 | −5 | −1 | 4 | 10 | 15 |
| Precipitation (mm) | 45 | 45 | 84 | 83 | 96 | 124 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 31 | 26 | 20 | 14 | 7 |
| Avg temp (°C) | 24 | 25 | 20 | 14 | 7 | 2 |
| Avg low (°C) | 20 | 20 | 16 | 9 | 2 | −3 |
| Precipitation (mm) | 145 | 107 | 156 | 127 | 58 | 38 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 75 | 73 | 69 | 71 | 80 | 79 | 70 | 76 | 71 | 72 | 77 |
| Relative humidity (%) | 90 | 87 | 82 | 76 | 75 | 79 | 81 | 81 | 83 | 84 | 85 | 88 |
| Wind speed (mph) | 5.4 | 5.8 | 5.7 | 4.9 | 4.0 | 3.1 | 3.0 | 2.8 | 3.0 | 3.3 | 3.8 | 4.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 75 | 73 | 69 | 71 | 80 |
| Relative humidity (%) | 90 | 87 | 82 | 76 | 75 | 79 |
| Wind speed (mph) | 5.4 | 5.8 | 5.7 | 4.9 | 4.0 | 3.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 70 | 76 | 71 | 72 | 77 |
| Relative humidity (%) | 81 | 81 | 83 | 84 | 85 | 88 |
| Wind speed (mph) | 3.0 | 2.8 | 3.0 | 3.3 | 3.8 | 4.8 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Hotaka, about 6 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.