Rifu, Japan climate
Cfa Humid subtropical
Rifu has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 27°C, while the coldest is January averaging around −2°C at night. Precipitation totals about 1175 mm a year and is strongly seasonal — September alone averages 172 mm while February barely receives 32 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)Rifu climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 5 | 9 | 15 | 19 | 22 | 26 | 27 | 24 | 19 | 13 | 7 |
| Avg temp (°C) | 1 | 1 | 4 | 10 | 15 | 18 | 22 | 24 | 20 | 15 | 9 | 3 |
| Avg low (°C) | −2 | −2 | 1 | 5 | 11 | 15 | 19 | 21 | 17 | 11 | 5 | 0 |
| Precipitation (mm) | 38 | 32 | 71 | 88 | 102 | 130 | 170 | 131 | 172 | 140 | 60 | 41 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 4 | 5 | 9 | 15 | 19 | 22 |
| Avg temp (°C) | 1 | 1 | 4 | 10 | 15 | 18 |
| Avg low (°C) | −2 | −2 | 1 | 5 | 11 | 15 |
| Precipitation (mm) | 38 | 32 | 71 | 88 | 102 | 130 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 27 | 24 | 19 | 13 | 7 |
| Avg temp (°C) | 22 | 24 | 20 | 15 | 9 | 3 |
| Avg low (°C) | 19 | 21 | 17 | 11 | 5 | 0 |
| Precipitation (mm) | 170 | 131 | 172 | 140 | 60 | 41 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 67 | 66 | 69 | 77 | 79 | 71 | 72 | 66 | 62 | 64 |
| Relative humidity (%) | 84 | 81 | 78 | 78 | 80 | 83 | 85 | 84 | 83 | 81 | 82 | 85 |
| Wind speed (m/s) | 4.6 | 4.6 | 4.3 | 3.8 | 3.3 | 2.8 | 2.6 | 2.7 | 3.1 | 3.4 | 3.6 | 4.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 64 | 65 | 67 | 66 | 69 | 77 |
| Relative humidity (%) | 84 | 81 | 78 | 78 | 80 | 83 |
| Wind speed (m/s) | 4.6 | 4.6 | 4.3 | 3.8 | 3.3 | 2.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 71 | 72 | 66 | 62 | 64 |
| Relative humidity (%) | 85 | 84 | 83 | 81 | 82 | 85 |
| Wind speed (m/s) | 2.6 | 2.7 | 3.1 | 3.4 | 3.6 | 4.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Shiogama, about 3 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.