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Kainan, Japan climate
Cfa Humid subtropical
Kainan 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 1316 mm a year and is strongly seasonal — September alone averages 179 mm while January barely receives 42 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)Kainan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 13 | 18 | 22 | 25 | 29 | 31 | 28 | 23 | 18 | 13 |
| Avg temp (°C) | 7 | 7 | 10 | 14 | 18 | 22 | 25 | 27 | 25 | 20 | 15 | 10 |
| Avg low (°C) | 4 | 4 | 7 | 11 | 15 | 19 | 23 | 25 | 22 | 17 | 12 | 7 |
| Precipitation (mm) | 42 | 58 | 87 | 84 | 124 | 166 | 148 | 106 | 179 | 172 | 90 | 62 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 13 | 18 | 22 | 25 |
| Avg temp (°C) | 7 | 7 | 10 | 14 | 18 | 22 |
| Avg low (°C) | 4 | 4 | 7 | 11 | 15 | 19 |
| Precipitation (mm) | 42 | 58 | 87 | 84 | 124 | 166 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 28 | 23 | 18 | 13 |
| Avg temp (°C) | 25 | 27 | 25 | 20 | 15 | 10 |
| Avg low (°C) | 23 | 25 | 22 | 17 | 12 | 7 |
| Precipitation (mm) | 148 | 106 | 179 | 172 | 90 | 62 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 77 | 75 | 74 | 76 | 79 | 83 | 85 | 83 | 80 | 77 | 76 | 77 |
| Wind speed (m/s) | 3.9 | 3.8 | 3.6 | 3.0 | 2.4 | 2.0 | 2.1 | 2.2 | 2.8 | 3.2 | 3.2 | 3.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 |
| Relative humidity (%) | 77 | 75 | 74 | 76 | 79 | 83 |
| Wind speed (m/s) | 3.9 | 3.8 | 3.6 | 3.0 | 2.4 | 2.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 85 | 83 | 80 | 77 | 76 | 77 |
| Wind speed (m/s) | 2.1 | 2.2 | 2.8 | 3.2 | 3.2 | 3.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Tomogashima, about 24 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.