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Aizu-Wakamatsu, Japan climate
Cfa Humid subtropical
Aizu-Wakamatsu 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 −3°C at night. Around 1253 mm of precipitation falls each year, peaking in July (196 mm) and easing off in April (63 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)Aizu-Wakamatsu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 4 | 9 | 17 | 23 | 26 | 29 | 31 | 26 | 20 | 12 | 6 |
| Avg temp (°C) | 0 | 0 | 4 | 10 | 16 | 21 | 24 | 25 | 21 | 14 | 7 | 2 |
| Avg low (°C) | −3 | −4 | −1 | 4 | 10 | 16 | 20 | 21 | 17 | 10 | 3 | −1 |
| Precipitation (mm) | 102 | 69 | 77 | 63 | 76 | 109 | 196 | 139 | 124 | 113 | 75 | 109 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 3 | 4 | 9 | 17 | 23 | 26 |
| Avg temp (°C) | 0 | 0 | 4 | 10 | 16 | 21 |
| Avg low (°C) | −3 | −4 | −1 | 4 | 10 | 16 |
| Precipitation (mm) | 102 | 69 | 77 | 63 | 76 | 109 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 26 | 20 | 12 | 6 |
| Avg temp (°C) | 24 | 25 | 21 | 14 | 7 | 2 |
| Avg low (°C) | 20 | 21 | 17 | 10 | 3 | −1 |
| Precipitation (mm) | 196 | 139 | 124 | 113 | 75 | 109 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 86 | 81 | 77 | 73 | 70 | 78 | 79 | 69 | 76 | 75 | 78 | 84 |
| Relative humidity (%) | 93 | 92 | 86 | 81 | 80 | 83 | 85 | 84 | 86 | 88 | 89 | 91 |
| Wind speed (m/s) | 1.7 | 2.1 | 1.9 | 1.3 | 0.9 | 0.6 | 0.6 | 0.5 | 0.6 | 0.7 | 0.8 | 1.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 86 | 81 | 77 | 73 | 70 | 78 |
| Relative humidity (%) | 93 | 92 | 86 | 81 | 80 | 83 |
| Wind speed (m/s) | 1.7 | 2.1 | 1.9 | 1.3 | 0.9 | 0.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 69 | 76 | 75 | 78 | 84 |
| Relative humidity (%) | 85 | 84 | 86 | 88 | 89 | 91 |
| Wind speed (m/s) | 0.6 | 0.5 | 0.6 | 0.7 | 0.8 | 1.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Wakamatsu, 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.