Sisimiut Weather in September
Sisimiut in September sees low daytime temperatures of 6°C (43°F) and nighttime lows of 2°C (36°F). With the highest rainfall of the year it is wise to pack an umbrella and expect frequent showers.
Rainfall in Sisimiut in September
Since this is the rainiest month of the year, it's a good idea to carry an umbrella just in case. This month experiences about 12 days of rain according to historical data, averaging 73 mm (2.9 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Sisimiut in September
September in Sisimiut brings low temperatures, with highs of 6°C (43°F) and nights around 2°C (36°F). The days stay cool from start to finish. Layering up well will make outdoor time much more comfortable. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Sisimiut in September
The area enjoys a moderate level of sunlight, with around 139 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Sisimiut in September
September sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.If you're planning additional trips, our weather planner can help you find destinations that match your weather preferences.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Greenland, check out our Sisimiut's climate page.
Sisimiut Temperature in September
Min Temperature
2°C (36°F)
Max Temperature
6°C (43°F)
Chance of Rain
41%
Precipitation
73 mm (2.9 in)
Rainy days
12 days
Humidity
83%
Windspeed
2 m/s (4 knots)
Sunshine
139 hours
Percentage Sunshine
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Sisimiut typically drop from around 8°C (46°F) at the start of September to approximately 4°C (39°F) by the end. Nights are cold, with lows typically ranging from -1°C (30°F) to 3°C (37°F).
Average temperatures in September
Historical weather for Sisimiut in September
Browse day-by-day weather records for Sisimiut spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sisimiut historical weather extremes in September
The extremes listed below come from historical weather data collected in Sisimiut from 2004 through 2025.
- Sisimiut recorded its highest September temperature of 17°C (63°F) on September 1, 2010.
- The lowest daytime temperature in September was 0°C (32°F), recorded on September 26, 2021.
- Sisimiut registered its coldest September night on September 27, 2021, with temperatures dropping to -7°C (19°F).
Best Places in Greenland in September
Find out more about the weather in Greenland and which places have the best travel conditions in this month. See all of Greenland in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Sisimiut in September
Cold weather calls for smart layering in September. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Rain gear is recommended, you can expect wet weather on multiple days. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Sisimiut in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Greenland, check out our Sisimiut's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Sisimiut climate overview or explore weather in Greenland.
