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Kamaishi, Japan climate
Cfa Humid subtropical
Kamaishi has a seasonal cool-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 28°C, while the coldest is January averaging around −2°C at night. Precipitation totals about 1687 mm a year and is strongly seasonal — September alone averages 254 mm while February barely receives 52 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)Kamaishi climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 6 | 9 | 15 | 20 | 22 | 26 | 28 | 24 | 19 | 14 | 8 |
| Avg temp (°C) | 1 | 2 | 5 | 10 | 14 | 18 | 21 | 23 | 20 | 14 | 9 | 4 |
| Avg low (°C) | −2 | −2 | 0 | 5 | 10 | 14 | 18 | 20 | 16 | 10 | 4 | 0 |
| Precipitation (mm) | 63 | 52 | 112 | 128 | 153 | 178 | 181 | 205 | 254 | 197 | 92 | 72 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 5 | 6 | 9 | 15 | 20 | 22 |
| Avg temp (°C) | 1 | 2 | 5 | 10 | 14 | 18 |
| Avg low (°C) | −2 | −2 | 0 | 5 | 10 | 14 |
| Precipitation (mm) | 63 | 52 | 112 | 128 | 153 | 178 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 26 | 28 | 24 | 19 | 14 | 8 |
| Avg temp (°C) | 21 | 23 | 20 | 14 | 9 | 4 |
| Avg low (°C) | 18 | 20 | 16 | 10 | 4 | 0 |
| Precipitation (mm) | 181 | 205 | 254 | 197 | 92 | 72 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 67 | 70 | 69 | 71 | 76 | 80 | 73 | 74 | 68 | 67 | 70 |
| Relative humidity (%) | 83 | 83 | 80 | 79 | 82 | 85 | 88 | 87 | 85 | 82 | 82 | 83 |
| Wind speed (mph) | 8.9 | 8.9 | 8.1 | 6.4 | 5.2 | 4.3 | 4.0 | 4.4 | 5.3 | 6.1 | 7.0 | 8.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 67 | 67 | 70 | 69 | 71 | 76 |
| Relative humidity (%) | 83 | 83 | 80 | 79 | 82 | 85 |
| Wind speed (mph) | 8.9 | 8.9 | 8.1 | 6.4 | 5.2 | 4.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 80 | 73 | 74 | 68 | 67 | 70 |
| Relative humidity (%) | 88 | 87 | 85 | 82 | 82 | 83 |
| Wind speed (mph) | 4.0 | 4.4 | 5.3 | 6.1 | 7.0 | 8.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kamaishi, about 1 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.