Otaru, Japan climate
Dfb Warm-summer humid continental
Otaru has a seasonal cool-temperate climate (Warm-summer humid continental, Köppen Dfb). The hottest month is August with an average daily high near 26°C, while the coldest is January averaging around −6°C at night. Around 1282 mm of precipitation falls each year, peaking in November (152 mm) and easing off in May (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)Otaru climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −1 | 0 | 4 | 11 | 17 | 20 | 24 | 26 | 22 | 16 | 8 | 2 |
| Avg temp (°C) | −3 | −3 | 1 | 7 | 12 | 16 | 20 | 22 | 18 | 12 | 5 | −1 |
| Avg low (°C) | −6 | −6 | −2 | 3 | 8 | 13 | 17 | 18 | 14 | 8 | 2 | −4 |
| Precipitation (mm) | 138 | 107 | 87 | 56 | 54 | 56 | 94 | 131 | 132 | 123 | 152 | 152 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −1 | 0 | 4 | 11 | 17 | 20 |
| Avg temp (°C) | −3 | −3 | 1 | 7 | 12 | 16 |
| Avg low (°C) | −6 | −6 | −2 | 3 | 8 | 13 |
| Precipitation (mm) | 138 | 107 | 87 | 56 | 54 | 56 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 26 | 22 | 16 | 8 | 2 |
| Avg temp (°C) | 20 | 22 | 18 | 12 | 5 | −1 |
| Avg low (°C) | 17 | 18 | 14 | 8 | 2 | −4 |
| Precipitation (mm) | 94 | 131 | 132 | 123 | 152 | 152 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 91 | 86 | 79 | 72 | 71 | 73 | 76 | 73 | 72 | 75 | 86 | 91 |
| Relative humidity (%) | 94 | 92 | 90 | 84 | 82 | 84 | 86 | 86 | 85 | 84 | 88 | 93 |
| Wind speed (mph) | 5.3 | 6.2 | 5.6 | 4.5 | 3.4 | 2.5 | 2.3 | 2.3 | 2.7 | 3.0 | 3.6 | 4.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 91 | 86 | 79 | 72 | 71 | 73 |
| Relative humidity (%) | 94 | 92 | 90 | 84 | 82 | 84 |
| Wind speed (mph) | 5.3 | 6.2 | 5.6 | 4.5 | 3.4 | 2.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 76 | 73 | 72 | 75 | 86 | 91 |
| Relative humidity (%) | 86 | 86 | 85 | 84 | 88 | 93 |
| Wind speed (mph) | 2.3 | 2.3 | 2.7 | 3.0 | 3.6 | 4.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Otaru, 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.