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Hitachi-ota, Japan climate
Cfa Humid subtropical
Hitachi-ota has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 29°C, while the coldest is January averaging around 0°C at night. Around 1456 mm of precipitation falls each year, peaking in October (188 mm) and easing off in December (50 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)Hitachi-ota climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 9 | 12 | 16 | 20 | 23 | 27 | 29 | 26 | 21 | 16 | 12 |
| Avg temp (°C) | 5 | 5 | 8 | 12 | 16 | 20 | 23 | 25 | 22 | 17 | 12 | 7 |
| Avg low (°C) | 0 | 0 | 3 | 8 | 13 | 17 | 21 | 22 | 19 | 14 | 8 | 3 |
| Precipitation (mm) | 56 | 52 | 107 | 131 | 164 | 160 | 163 | 125 | 179 | 188 | 79 | 50 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 9 | 12 | 16 | 20 | 23 |
| Avg temp (°C) | 5 | 5 | 8 | 12 | 16 | 20 |
| Avg low (°C) | 0 | 0 | 3 | 8 | 13 | 17 |
| Precipitation (mm) | 56 | 52 | 107 | 131 | 164 | 160 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 29 | 26 | 21 | 16 | 12 |
| Avg temp (°C) | 23 | 25 | 22 | 17 | 12 | 7 |
| Avg low (°C) | 21 | 22 | 19 | 14 | 8 | 3 |
| Precipitation (mm) | 163 | 125 | 179 | 188 | 79 | 50 |
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 (km/h) | 8.9 | 9.0 | 8.8 | 8.0 | 6.6 | 5.5 | 5.1 | 5.3 | 6.6 | 7.3 | 7.5 | 8.3 |
| 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 (km/h) | 8.9 | 9.0 | 8.8 | 8.0 | 6.6 | 5.5 |
| 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 (km/h) | 5.1 | 5.3 | 6.6 | 7.3 | 7.5 | 8.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Hitachi, about 11 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.