Home › Cities › Japan › Yamaguchi
Yamaguchi, Japan climate
Cfa Humid subtropical
Yamaguchi has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 33°C, while the coldest is January averaging around 0°C at night. Precipitation totals about 1928 mm a year and is strongly seasonal — July alone averages 343 mm while December barely receives 71 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)Yamaguchi climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 15 | 20 | 25 | 28 | 31 | 33 | 29 | 24 | 18 | 12 |
| Avg temp (°C) | 4 | 6 | 9 | 14 | 19 | 23 | 26 | 27 | 24 | 18 | 12 | 6 |
| Avg low (°C) | 0 | 1 | 4 | 8 | 13 | 18 | 23 | 23 | 19 | 13 | 7 | 2 |
| Precipitation (mm) | 76 | 85 | 146 | 168 | 197 | 283 | 343 | 206 | 179 | 91 | 83 | 71 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 15 | 20 | 25 | 28 |
| Avg temp (°C) | 4 | 6 | 9 | 14 | 19 | 23 |
| Avg low (°C) | 0 | 1 | 4 | 8 | 13 | 18 |
| Precipitation (mm) | 76 | 85 | 146 | 168 | 197 | 283 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 33 | 29 | 24 | 18 | 12 |
| Avg temp (°C) | 26 | 27 | 24 | 18 | 12 | 6 |
| Avg low (°C) | 23 | 23 | 19 | 13 | 7 | 2 |
| Precipitation (mm) | 343 | 206 | 179 | 91 | 83 | 71 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 85 | 81 | 75 | 68 | 67 | 79 | 74 | 67 | 72 | 67 | 74 | 81 |
| Relative humidity (%) | 77 | 76 | 76 | 77 | 79 | 83 | 84 | 82 | 82 | 80 | 78 | 78 |
| Wind speed (mph) | 4.9 | 4.6 | 4.2 | 3.4 | 2.9 | 2.6 | 2.6 | 2.9 | 3.2 | 3.5 | 3.8 | 4.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 85 | 81 | 75 | 68 | 67 | 79 |
| Relative humidity (%) | 77 | 76 | 76 | 77 | 79 | 83 |
| Wind speed (mph) | 4.9 | 4.6 | 4.2 | 3.4 | 2.9 | 2.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 67 | 72 | 67 | 74 | 81 |
| Relative humidity (%) | 84 | 82 | 82 | 80 | 78 | 78 |
| Wind speed (mph) | 2.6 | 2.9 | 3.2 | 3.5 | 3.8 | 4.6 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Yamaguchi, about 2 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.