Anan, Japan climate
Cfa Humid subtropical
Anan 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 39°F at night. Precipitation totals about 78 inches a year and is strongly seasonal — September alone averages 11.2 inches while January barely receives 2.74 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)Anan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 51 | 57 | 65 | 73 | 78 | 84 | 88 | 82 | 73 | 64 | 55 |
| Avg temp (°F) | 45 | 45 | 50 | 58 | 66 | 72 | 78 | 81 | 76 | 67 | 58 | 49 |
| Avg low (°F) | 39 | 39 | 43 | 51 | 60 | 67 | 74 | 76 | 71 | 62 | 53 | 44 |
| Precipitation (in) | 2.7 | 3.6 | 5.3 | 5.9 | 7.2 | 9.6 | 9.0 | 6.8 | 11.2 | 9.0 | 4.9 | 3.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 51 | 57 | 65 | 73 | 78 |
| Avg temp (°F) | 45 | 45 | 50 | 58 | 66 | 72 |
| Avg low (°F) | 39 | 39 | 43 | 51 | 60 | 67 |
| Precipitation (in) | 2.7 | 3.6 | 5.3 | 5.9 | 7.2 | 9.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 84 | 88 | 82 | 73 | 64 | 55 |
| Avg temp (°F) | 78 | 81 | 76 | 67 | 58 | 49 |
| Avg low (°F) | 74 | 76 | 71 | 62 | 53 | 44 |
| Precipitation (in) | 9.0 | 6.8 | 11.2 | 9.0 | 4.9 | 3.3 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 66 | 67 | 66 | 70 | 82 | 71 | 60 | 69 | 64 | 63 | 62 |
| Relative humidity (%) | 77 | 75 | 74 | 75 | 79 | 84 | 86 | 83 | 80 | 77 | 76 | 76 |
| Wind speed (mph) | 8.9 | 8.9 | 8.5 | 7.1 | 5.7 | 5.1 | 5.0 | 5.4 | 6.6 | 7.6 | 7.6 | 8.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 66 | 67 | 66 | 70 | 82 |
| Relative humidity (%) | 77 | 75 | 74 | 75 | 79 | 84 |
| Wind speed (mph) | 8.9 | 8.9 | 8.5 | 7.1 | 5.7 | 5.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 60 | 69 | 64 | 63 | 62 |
| Relative humidity (%) | 86 | 83 | 80 | 77 | 76 | 76 |
| Wind speed (mph) | 5.0 | 5.4 | 6.6 | 7.6 | 7.6 | 8.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kamoda, about 12 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.