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Nichinan, Japan climate
Cfa Humid subtropical
Nichinan has a seasonal warm-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around 5°C at night. Precipitation totals about 2764 mm a year and is strongly seasonal — June alone averages 565 mm while January barely receives 84 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)Nichinan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 15 | 17 | 21 | 25 | 27 | 31 | 32 | 29 | 25 | 20 | 16 |
| Avg temp (°C) | 9 | 10 | 13 | 17 | 21 | 23 | 27 | 28 | 25 | 21 | 16 | 11 |
| Avg low (°C) | 5 | 6 | 9 | 13 | 17 | 21 | 24 | 25 | 22 | 17 | 12 | 7 |
| Precipitation (mm) | 84 | 133 | 193 | 237 | 248 | 565 | 310 | 231 | 307 | 228 | 137 | 92 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 15 | 17 | 21 | 25 | 27 |
| Avg temp (°C) | 9 | 10 | 13 | 17 | 21 | 23 |
| Avg low (°C) | 5 | 6 | 9 | 13 | 17 | 21 |
| Precipitation (mm) | 84 | 133 | 193 | 237 | 248 | 565 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 32 | 29 | 25 | 20 | 16 |
| Avg temp (°C) | 27 | 28 | 25 | 21 | 16 | 11 |
| Avg low (°C) | 24 | 25 | 22 | 17 | 12 | 7 |
| Precipitation (mm) | 310 | 231 | 307 | 228 | 137 | 92 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 64 | 66 | 67 | 72 | 83 | 65 | 58 | 65 | 60 | 60 | 59 |
| Relative humidity (%) | 80 | 78 | 77 | 77 | 79 | 86 | 86 | 84 | 82 | 79 | 79 | 80 |
| Wind speed (mph) | 10.0 | 10.3 | 10.4 | 9.8 | 9.1 | 9.8 | 9.2 | 9.3 | 9.2 | 9.6 | 8.9 | 9.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 64 | 66 | 67 | 72 | 83 |
| Relative humidity (%) | 80 | 78 | 77 | 77 | 79 | 86 |
| Wind speed (mph) | 10.0 | 10.3 | 10.4 | 9.8 | 9.1 | 9.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 65 | 58 | 65 | 60 | 60 | 59 |
| Relative humidity (%) | 86 | 84 | 82 | 79 | 79 | 80 |
| Wind speed (mph) | 9.2 | 9.3 | 9.2 | 9.6 | 8.9 | 9.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Aburatsu, about 4 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.