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Muroran, Japan climate
Cfb Oceanic / temperate
Muroran has a seasonal cool-temperate climate (Oceanic / temperate, Köppen Cfb). The hottest month is August with an average daily high near 74°F, while the coldest is January averaging around 25°F at night. Precipitation totals about 47 inches a year and is strongly seasonal — August alone averages 7.4 inches while February barely receives 1.74 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)Muroran climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 33 | 34 | 40 | 50 | 59 | 64 | 71 | 74 | 71 | 61 | 49 | 37 |
| Avg temp (°F) | 29 | 29 | 35 | 43 | 51 | 58 | 65 | 69 | 65 | 55 | 44 | 33 |
| Avg low (°F) | 25 | 25 | 30 | 37 | 46 | 53 | 62 | 65 | 60 | 50 | 38 | 29 |
| Precipitation (in) | 2.1 | 1.7 | 2.0 | 2.8 | 4.3 | 4.3 | 6.3 | 7.4 | 6.2 | 4.0 | 3.3 | 2.6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 33 | 34 | 40 | 50 | 59 | 64 |
| Avg temp (°F) | 29 | 29 | 35 | 43 | 51 | 58 |
| Avg low (°F) | 25 | 25 | 30 | 37 | 46 | 53 |
| Precipitation (in) | 2.1 | 1.7 | 2.0 | 2.8 | 4.3 | 4.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 71 | 74 | 71 | 61 | 49 | 37 |
| Avg temp (°F) | 65 | 69 | 65 | 55 | 44 | 33 |
| Avg low (°F) | 62 | 65 | 60 | 50 | 38 | 29 |
| Precipitation (in) | 6.3 | 7.4 | 6.2 | 4.0 | 3.3 | 2.6 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 86 | 77 | 69 | 70 | 73 | 77 | 73 | 71 | 73 | 83 | 89 |
| Relative humidity (%) | 89 | 86 | 84 | 83 | 85 | 87 | 90 | 88 | 84 | 80 | 83 | 88 |
| Wind speed (mph) | 9.4 | 9.4 | 8.4 | 6.3 | 4.8 | 4.1 | 4.1 | 4.5 | 5.8 | 6.9 | 8.1 | 9.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 90 | 86 | 77 | 69 | 70 | 73 |
| Relative humidity (%) | 89 | 86 | 84 | 83 | 85 | 87 |
| Wind speed (mph) | 9.4 | 9.4 | 8.4 | 6.3 | 4.8 | 4.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 73 | 71 | 73 | 83 | 89 |
| Relative humidity (%) | 90 | 88 | 84 | 80 | 83 | 88 |
| Wind speed (mph) | 4.1 | 4.5 | 5.8 | 6.9 | 8.1 | 9.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Muroran, 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.