Climate Insights for Sisimiut

The climate in Sisimiut is cold. The average annual temperature is -5°C and approximately 503mm of precipitation falls per year. July is the wettest month, receiving around 59mm of rainfall. Sisimiut is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are February, January, March, when temperatures can drop to -22°C. Sisimiut experiences heavy snowfall, typically from January through December.

Temperatures in Sisimiut vary considerably across the year, with a 34°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 12°C with a mean of 9°C. February brings the harshest conditions, with lows dropping to -22°C and an average temperature of -19°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between March and April, with a 8°C shift in average temperatures.

Sisimiut is a relatively dry area, receiving approximately 503mm of precipitation annually, which averages out to around 42mm per month. The wettest month is July, averaging 59mm of rainfall. October and December also tend to see above-average precipitation. The driest month is February, with just 16mm. That's 43mm less than July, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. Sisimiut receives heavy snowfall, accumulating around 301cm annually from January through December. The snowiest month is December, with approximately 47cm. Winter travel should account for significant snow cover.

Sisimiut is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently summer in Sisimiut, which began on June 21, 2026. Sisimiut is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 12°C, while the coldest stretch bottoms out in February near -22°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The table below shows monthly climate averages for Sisimiut based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.