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 78°F, while the coldest is January averaging around 22°F at night. Around 50 inches of precipitation falls each year, peaking in November (6.0 inches) and easing off in May (2.1 inches).
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 (°F) | 31 | 32 | 39 | 52 | 62 | 69 | 76 | 78 | 72 | 61 | 47 | 35 |
| Avg temp (°F) | 26 | 27 | 33 | 44 | 54 | 61 | 68 | 71 | 65 | 53 | 41 | 30 |
| Avg low (°F) | 22 | 22 | 28 | 37 | 46 | 55 | 63 | 65 | 58 | 46 | 35 | 25 |
| Precipitation (in) | 5.4 | 4.2 | 3.4 | 2.2 | 2.1 | 2.2 | 3.7 | 5.2 | 5.2 | 4.8 | 6.0 | 6.0 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 31 | 32 | 39 | 52 | 62 | 69 |
| Avg temp (°F) | 26 | 27 | 33 | 44 | 54 | 61 |
| Avg low (°F) | 22 | 22 | 28 | 37 | 46 | 55 |
| Precipitation (in) | 5.4 | 4.2 | 3.4 | 2.2 | 2.1 | 2.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 76 | 78 | 72 | 61 | 47 | 35 |
| Avg temp (°F) | 68 | 71 | 65 | 53 | 41 | 30 |
| Avg low (°F) | 63 | 65 | 58 | 46 | 35 | 25 |
| Precipitation (in) | 3.7 | 5.2 | 5.2 | 4.8 | 6.0 | 6.0 |
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.