Sisimiut
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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.

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

Sisimiut Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Sisimiut - and find the best time to visit.

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 records 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 2026.

  • 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
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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 month

What To Do in Sisimiut in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    5/10
  • Cycling
    4/10
  • Walking
    4/10
  • Camping
    4/10
  • Outdoor sports
    4/10

Sisimiut 3-Day Forecast

More climate data for Sisimiut

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.