Unnan, Japan climate
Cfa Humid subtropical
Unnan has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 87°F, while the coldest is January averaging around 31°F at night. Precipitation is fairly even year-round, totalling about 77 inches.
☀️
Summers
Hot
Highs near 87°F in August.
❄️
Winters
Cold
Lows near 31°F in January.
🌧️
Rain
Very wet
About 77 in of rain a year.
Wettest in July
⛅
Sky & trend
Often grey
Overcast skies dominate much of the year.
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)Unnan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 43 | 46 | 53 | 65 | 74 | 79 | 85 | 87 | 79 | 69 | 59 | 48 |
| Avg temp (°F) | 36 | 37 | 43 | 53 | 62 | 69 | 76 | 78 | 69 | 59 | 49 | 41 |
| Avg low (°F) | 31 | 30 | 34 | 42 | 51 | 60 | 69 | 70 | 62 | 50 | 41 | 34 |
| Precipitation (in) | 6.6 | 5.5 | 6.1 | 4.9 | 5.0 | 7.3 | 9.3 | 6.2 | 9.2 | 5.2 | 4.9 | 6.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 43 | 46 | 53 | 65 | 74 | 79 |
| Avg temp (°F) | 36 | 37 | 43 | 53 | 62 | 69 |
| Avg low (°F) | 31 | 30 | 34 | 42 | 51 | 60 |
| Precipitation (in) | 6.6 | 5.5 | 6.1 | 4.9 | 5.0 | 7.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 85 | 87 | 79 | 69 | 59 | 48 |
| Avg temp (°F) | 76 | 78 | 69 | 59 | 49 | 41 |
| Avg low (°F) | 69 | 70 | 62 | 50 | 41 | 34 |
| Precipitation (in) | 9.3 | 6.2 | 9.2 | 5.2 | 4.9 | 6.7 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 88 | 83 | 75 | 68 | 69 | 78 | 75 | 65 | 71 | 68 | 75 | 84 |
| Relative humidity (%) | 86 | 84 | 82 | 79 | 78 | 82 | 85 | 83 | 84 | 83 | 84 | 86 |
| Wind speed (mph) | 8.0 | 7.9 | 7.9 | 7.4 | 6.8 | 5.7 | 6.3 | 5.9 | 6.2 | 6.2 | 6.5 | 7.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 88 | 83 | 75 | 68 | 69 | 78 |
| Relative humidity (%) | 86 | 84 | 82 | 79 | 78 | 82 |
| Wind speed (mph) | 8.0 | 7.9 | 7.9 | 7.4 | 6.8 | 5.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 65 | 71 | 68 | 75 | 84 |
| Relative humidity (%) | 85 | 83 | 84 | 83 | 84 | 86 |
| Wind speed (mph) | 6.3 | 5.9 | 6.2 | 6.2 | 6.5 | 7.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kakeya, about 9 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.