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Okazaki, Japan climate
Cfa Humid subtropical
Okazaki 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 −1°C at night. Precipitation totals about 1508 mm a year and is strongly seasonal — September alone averages 223 mm while January barely receives 54 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)Okazaki climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 20 | 24 | 27 | 31 | 33 | 29 | 23 | 17 | 12 |
| Avg temp (°C) | 4 | 5 | 9 | 14 | 19 | 22 | 26 | 27 | 24 | 18 | 12 | 6 |
| Avg low (°C) | −1 | 0 | 3 | 8 | 13 | 18 | 23 | 23 | 20 | 13 | 7 | 1 |
| Precipitation (mm) | 54 | 61 | 116 | 124 | 139 | 177 | 181 | 118 | 223 | 177 | 80 | 57 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 20 | 24 | 27 |
| Avg temp (°C) | 4 | 5 | 9 | 14 | 19 | 22 |
| Avg low (°C) | −1 | 0 | 3 | 8 | 13 | 18 |
| Precipitation (mm) | 54 | 61 | 116 | 124 | 139 | 177 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 33 | 29 | 23 | 17 | 12 |
| Avg temp (°C) | 26 | 27 | 24 | 18 | 12 | 6 |
| Avg low (°C) | 23 | 23 | 20 | 13 | 7 | 1 |
| Precipitation (mm) | 181 | 118 | 223 | 177 | 80 | 57 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 59 | 60 | 62 | 67 | 79 | 70 | 56 | 65 | 62 | 56 | 54 |
| Relative humidity (%) | 82 | 80 | 78 | 78 | 79 | 83 | 85 | 83 | 83 | 83 | 83 | 83 |
| Wind speed (km/h) | 5.9 | 6.3 | 6.1 | 5.4 | 4.6 | 3.9 | 3.6 | 3.8 | 4.1 | 4.2 | 4.5 | 5.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 57 | 59 | 60 | 62 | 67 | 79 |
| Relative humidity (%) | 82 | 80 | 78 | 78 | 79 | 83 |
| Wind speed (km/h) | 5.9 | 6.3 | 6.1 | 5.4 | 4.6 | 3.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 56 | 65 | 62 | 56 | 54 |
| Relative humidity (%) | 85 | 83 | 83 | 83 | 83 | 83 |
| Wind speed (km/h) | 3.6 | 3.8 | 4.1 | 4.2 | 4.5 | 5.3 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Okazaki, 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.