Sisimiut in September
In September, Sisimiut averages 5°C (42°F) during the day and 1°C (34°F) at night, with frequent rain — about 16 days of the month see precipitation (65 mm total).
ShoulderConditions are cold — pack winter layers. Expect daily rain or showers, often in heavy bursts.
September is one of the wetter and less comfortable months in Sisimiut. If your dates are flexible, consider a different time of year.
How September compares to the rest of the year in Sisimiut
September is in the middle of the year for warmth in Sisimiut (4th of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 7°C above the annual average (-1°C). September runs 5°C cooler than August (10°C) and cools 6°C in October (-1°C).
September sunrise & sunset in Sisimiut
Times shown for Sisimiut local time (America/Nuuk), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Sisimiut — September
Golden-hour and blue-hour windows for the 15th of September, in Sisimiut's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Sisimiut in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Sisimiut's popularity.
Crowds & pricing — September in Sisimiut
Sisimiut is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Sisimiut
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sisimiut in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | -11°C / 11°F | -17°C / 2°F | 42 mm | 16 | — |
| February | -14°C / 6°F | -20°C / -3°F | 22 mm | 11 | — |
| March | -10°C / 13°F | -16°C / 4°F | 28 mm | 12 | — |
| April | -3°C / 26°F | -9°C / 16°F | 46 mm | 12 | — |
| May | 2°C / 36°F | -2°C / 28°F | 35 mm | 11 | — |
| June | 8°C / 46°F | 3°C / 37°F | 38 mm | 13 | — |
| July | 11°C / 53°F | 6°C / 43°F | 73 mm | 12 | — |
| August | 10°C / 51°F | 6°C / 42°F | 68 mm | 16 | — |
| September | 5°C / 42°F | 1°C / 34°F | 65 mm | 16 | — |
| October | -1°C / 31°F | -5°C / 22°F | 75 mm | 16 | — |
| November | -6°C / 22°F | -11°C / 12°F | 57 mm | 17 | — |
| December | -8°C / 17°F | -14°C / 7°F | 59 mm | 14 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Sisimiut in September →
Frequently asked questions
How hot is Sisimiut in September?
In September, Sisimiut averages a high of 5°C (42°F) and a low of 1°C (34°F) — generally cold.
Does it rain a lot in Sisimiut in September?
September is quite rainy in Sisimiut, with about 16 rainy days on average.
Is September a good time to visit Sisimiut?
September is cold but on the rainy side. It suits travelers who are comfortable with cold weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Sisimiut in September?
Pack heavy winter layers, a coat, hat and gloves, plus a compact umbrella or rain jacket. See the full September packing list for Sisimiut for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.