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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 88°F, while the coldest is January averaging around 30°F at night. Around 48 inches of precipitation falls each year, peaking in October (7.0 inches) and easing off in February (1.8 inches).
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 (°F) | 49 | 50 | 56 | 65 | 73 | 78 | 85 | 88 | 81 | 71 | 62 | 53 |
| Avg temp (°F) | 39 | 41 | 47 | 56 | 64 | 70 | 77 | 79 | 73 | 63 | 53 | 43 |
| Avg low (°F) | 30 | 32 | 38 | 47 | 56 | 64 | 71 | 73 | 67 | 56 | 44 | 35 |
| Precipitation (in) | 1.9 | 1.8 | 3.6 | 4.1 | 4.8 | 4.9 | 4.9 | 3.9 | 6.8 | 7.0 | 2.9 | 1.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 49 | 50 | 56 | 65 | 73 | 78 |
| Avg temp (°F) | 39 | 41 | 47 | 56 | 64 | 70 |
| Avg low (°F) | 30 | 32 | 38 | 47 | 56 | 64 |
| Precipitation (in) | 1.9 | 1.8 | 3.6 | 4.1 | 4.8 | 4.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 88 | 81 | 71 | 62 | 53 |
| Avg temp (°F) | 77 | 79 | 73 | 63 | 53 | 43 |
| Avg low (°F) | 71 | 73 | 67 | 56 | 44 | 35 |
| Precipitation (in) | 4.9 | 3.9 | 6.8 | 7.0 | 2.9 | 1.9 |
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 (mph) | 5.5 | 6.0 | 6.4 | 6.6 | 6.2 | 5.6 | 5.7 | 5.4 | 5.6 | 5.3 | 4.8 | 5.1 |
| 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 (mph) | 5.5 | 6.0 | 6.4 | 6.6 | 6.2 | 5.6 |
| 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 (mph) | 5.7 | 5.4 | 5.6 | 5.3 | 4.8 | 5.1 |
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.