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 31°C, while the coldest is January averaging around 4°C at night. Precipitation totals about 1992 mm a year and is strongly seasonal — September alone averages 285 mm while January barely receives 70 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)Anan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 14 | 19 | 23 | 25 | 29 | 31 | 28 | 23 | 18 | 13 |
| Avg temp (°C) | 7 | 7 | 10 | 15 | 19 | 22 | 26 | 27 | 25 | 20 | 15 | 10 |
| Avg low (°C) | 4 | 4 | 6 | 11 | 15 | 19 | 23 | 25 | 22 | 17 | 11 | 6 |
| Precipitation (mm) | 70 | 91 | 134 | 149 | 183 | 243 | 229 | 172 | 285 | 229 | 125 | 83 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 14 | 19 | 23 | 25 |
| Avg temp (°C) | 7 | 7 | 10 | 15 | 19 | 22 |
| Avg low (°C) | 4 | 4 | 6 | 11 | 15 | 19 |
| Precipitation (mm) | 70 | 91 | 134 | 149 | 183 | 243 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 28 | 23 | 18 | 13 |
| Avg temp (°C) | 26 | 27 | 25 | 20 | 15 | 10 |
| Avg low (°C) | 23 | 25 | 22 | 17 | 11 | 6 |
| Precipitation (mm) | 229 | 172 | 285 | 229 | 125 | 83 |
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 (m/s) | 4.0 | 4.0 | 3.8 | 3.2 | 2.6 | 2.3 | 2.2 | 2.4 | 3.0 | 3.4 | 3.4 | 3.7 |
| 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 (m/s) | 4.0 | 4.0 | 3.8 | 3.2 | 2.6 | 2.3 |
| 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 (m/s) | 2.2 | 2.4 | 3.0 | 3.4 | 3.4 | 3.7 |
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.