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Hitachiomiya, Japan climate
Cfa Humid subtropical
Hitachiomiya has a seasonal mild-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 −4°C at night. Precipitation totals about 1366 mm a year and is strongly seasonal — September alone averages 187 mm while January barely receives 40 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)Hitachiomiya climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 13 | 18 | 23 | 25 | 29 | 30 | 27 | 21 | 16 | 11 |
| Avg temp (°C) | 2 | 3 | 6 | 11 | 16 | 20 | 24 | 25 | 21 | 15 | 9 | 4 |
| Avg low (°C) | −4 | −4 | 0 | 5 | 10 | 15 | 20 | 21 | 17 | 11 | 4 | −2 |
| Precipitation (mm) | 40 | 44 | 89 | 113 | 136 | 148 | 184 | 150 | 187 | 160 | 73 | 42 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 13 | 18 | 23 | 25 |
| Avg temp (°C) | 2 | 3 | 6 | 11 | 16 | 20 |
| Avg low (°C) | −4 | −4 | 0 | 5 | 10 | 15 |
| Precipitation (mm) | 40 | 44 | 89 | 113 | 136 | 148 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 30 | 27 | 21 | 16 | 11 |
| Avg temp (°C) | 24 | 25 | 21 | 15 | 9 | 4 |
| Avg low (°C) | 20 | 21 | 17 | 11 | 4 | −2 |
| Precipitation (mm) | 184 | 150 | 187 | 160 | 73 | 42 |
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 (%) | 78 | 76 | 76 | 78 | 81 | 85 | 86 | 85 | 85 | 83 | 81 | 80 |
| Wind speed (m/s) | 2.5 | 2.5 | 2.4 | 2.2 | 1.8 | 1.5 | 1.4 | 1.5 | 1.8 | 2.0 | 2.1 | 2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 62 | 65 | 66 | 70 | 80 |
| Relative humidity (%) | 78 | 76 | 76 | 78 | 81 | 85 |
| Wind speed (m/s) | 2.5 | 2.5 | 2.4 | 2.2 | 1.8 | 1.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 68 | 74 | 69 | 62 | 57 |
| Relative humidity (%) | 86 | 85 | 85 | 83 | 81 | 80 |
| Wind speed (m/s) | 1.4 | 1.5 | 1.8 | 2.0 | 2.1 | 2.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Hitachiomiya, about 8 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.