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Fukushima, Japan climate
Cfa Humid subtropical
Fukushima has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 30°C, while the coldest is January averaging around −3°C at night. Precipitation totals about 1189 mm a year and is strongly seasonal — July alone averages 185 mm while February barely receives 34 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)Fukushima climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 7 | 10 | 17 | 22 | 25 | 28 | 30 | 25 | 20 | 14 | 8 |
| Avg temp (°C) | 1 | 2 | 5 | 11 | 16 | 20 | 23 | 24 | 20 | 14 | 8 | 3 |
| Avg low (°C) | −3 | −3 | 0 | 5 | 10 | 15 | 20 | 21 | 16 | 10 | 3 | −1 |
| Precipitation (mm) | 42 | 34 | 74 | 87 | 91 | 126 | 185 | 146 | 167 | 138 | 59 | 41 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 7 | 10 | 17 | 22 | 25 |
| Avg temp (°C) | 1 | 2 | 5 | 11 | 16 | 20 |
| Avg low (°C) | −3 | −3 | 0 | 5 | 10 | 15 |
| Precipitation (mm) | 42 | 34 | 74 | 87 | 91 | 126 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 28 | 30 | 25 | 20 | 14 | 8 |
| Avg temp (°C) | 23 | 24 | 20 | 14 | 8 | 3 |
| Avg low (°C) | 20 | 21 | 16 | 10 | 3 | −1 |
| Precipitation (mm) | 185 | 146 | 167 | 138 | 59 | 41 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 63 | 65 | 66 | 69 | 77 | 78 | 69 | 74 | 68 | 63 | 63 |
| Relative humidity (%) | 88 | 85 | 82 | 80 | 80 | 83 | 85 | 84 | 86 | 86 | 87 | 88 |
| Wind speed (m/s) | 2.7 | 2.9 | 2.8 | 2.7 | 2.3 | 1.8 | 1.7 | 1.7 | 1.9 | 2.0 | 2.1 | 2.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 62 | 63 | 65 | 66 | 69 | 77 |
| Relative humidity (%) | 88 | 85 | 82 | 80 | 80 | 83 |
| Wind speed (m/s) | 2.7 | 2.9 | 2.8 | 2.7 | 2.3 | 1.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 69 | 74 | 68 | 63 | 63 |
| Relative humidity (%) | 85 | 84 | 86 | 86 | 87 | 88 |
| Wind speed (m/s) | 1.7 | 1.7 | 1.9 | 2.0 | 2.1 | 2.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Nihommatsu, about 19 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.