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Kasumigaura, Japan climate
Cfa Humid subtropical
Kasumigaura has a seasonal mild-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 −1°C at night. Around 1230 mm of precipitation falls each year, peaking in October (178 mm) and easing off in February (46 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)Kasumigaura climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 13 | 19 | 23 | 25 | 29 | 31 | 27 | 22 | 16 | 12 |
| Avg temp (°C) | 4 | 5 | 8 | 13 | 18 | 21 | 25 | 26 | 23 | 17 | 12 | 6 |
| Avg low (°C) | −1 | 0 | 3 | 8 | 14 | 18 | 22 | 23 | 19 | 14 | 7 | 2 |
| Precipitation (mm) | 49 | 46 | 91 | 105 | 121 | 123 | 124 | 99 | 172 | 178 | 75 | 47 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 13 | 19 | 23 | 25 |
| Avg temp (°C) | 4 | 5 | 8 | 13 | 18 | 21 |
| Avg low (°C) | −1 | 0 | 3 | 8 | 14 | 18 |
| Precipitation (mm) | 49 | 46 | 91 | 105 | 121 | 123 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 27 | 22 | 16 | 12 |
| Avg temp (°C) | 25 | 26 | 23 | 17 | 12 | 6 |
| Avg low (°C) | 22 | 23 | 19 | 14 | 7 | 2 |
| Precipitation (mm) | 124 | 99 | 172 | 178 | 75 | 47 |
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 (%) | 75 | 74 | 74 | 74 | 76 | 79 | 80 | 80 | 81 | 81 | 79 | 77 |
| Wind speed (m/s) | 2.4 | 2.7 | 2.8 | 3.0 | 2.8 | 2.5 | 2.6 | 2.4 | 2.5 | 2.4 | 2.2 | 2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 62 | 65 | 66 | 70 | 80 |
| Relative humidity (%) | 75 | 74 | 74 | 74 | 76 | 79 |
| Wind speed (m/s) | 2.4 | 2.7 | 2.8 | 3.0 | 2.8 | 2.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 68 | 74 | 69 | 62 | 57 |
| Relative humidity (%) | 80 | 80 | 81 | 81 | 79 | 77 |
| Wind speed (m/s) | 2.6 | 2.4 | 2.5 | 2.4 | 2.2 | 2.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Tsuchiura, 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.