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Sisimiut, Greenland climate
ET Tundra
Sisimiut has a seasonal subarctic climate (Tundra, Köppen ET). The hottest month is July with an average daily high near 14°C, while the coldest is February averaging around −15°C at night. Around 496 mm of precipitation falls each year, peaking in October (64 mm) and easing off in June (17 mm). At latitude 67°N, day length swings from 0.0 hours in midwinter to 24.0 hours at midsummer.
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)Sisimiut climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | −7 | −8 | −6 | −1 | 6 | 11 | 14 | 13 | 8 | 3 | −2 | −4 |
| Avg temp (°C) | −10 | −11 | −10 | −5 | 2 | 7 | 9 | 9 | 5 | 0 | −4 | −7 |
| Avg low (°C) | −13 | −15 | −14 | −8 | −1 | 3 | 5 | 5 | 2 | −2 | −7 | −10 |
| Precipitation (mm) | 34 | 25 | 30 | 29 | 25 | 17 | 49 | 62 | 54 | 64 | 58 | 50 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | −7 | −8 | −6 | −1 | 6 | 11 |
| Avg temp (°C) | −10 | −11 | −10 | −5 | 2 | 7 |
| Avg low (°C) | −13 | −15 | −14 | −8 | −1 | 3 |
| Precipitation (mm) | 34 | 25 | 30 | 29 | 25 | 17 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 14 | 13 | 8 | 3 | −2 | −4 |
| Avg temp (°C) | 9 | 9 | 5 | 0 | −4 | −7 |
| Avg low (°C) | 5 | 5 | 2 | −2 | −7 | −10 |
| Precipitation (mm) | 49 | 62 | 54 | 64 | 58 | 50 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 9 | 7 | 6 | 7 | 7 | 8 | 10 | 10 | 10 | 11 |
| Days with low ≤ 0°C (days) | 26 | 24 | 27 | 26 | 18 | 3 | 0.1 | — | 5 | 21 | 26 | 27 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 10 | 9 | 9 | 7 | 6 | 7 |
| Days with low ≤ 0°C (days) | 26 | 24 | 27 | 26 | 18 | 3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 7 | 8 | 10 | 10 | 10 | 11 |
| Days with low ≤ 0°C (days) | 0.1 | — | 5 | 21 | 26 | 27 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 76 | 73 | 70 | 72 | 71 | 68 | 70 | 72 | 71 | 77 | 77 |
| Relative humidity (%) | 94 | 95 | 93 | 89 | 86 | 87 | 87 | 87 | 85 | 86 | 88 | 91 |
| Wind speed (km/h) | 14.0 | 12.3 | 12.7 | 12.9 | 11.2 | 9.9 | 8.8 | 9.8 | 11.7 | 12.7 | 14.1 | 14.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 76 | 73 | 70 | 72 | 71 |
| Relative humidity (%) | 94 | 95 | 93 | 89 | 86 | 87 |
| Wind speed (km/h) | 14.0 | 12.3 | 12.7 | 12.9 | 11.2 | 9.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 70 | 72 | 71 | 77 | 77 |
| Relative humidity (%) | 87 | 87 | 85 | 86 | 88 | 91 |
| Wind speed (km/h) | 8.8 | 9.8 | 11.7 | 12.7 | 14.1 | 14.5 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 19 years of daily observations at Mitt. Sisimiut, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.
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.