Greenland
Ilulissat in September: weather, sea & travel advice
This month's data profile
Clear transition month
Ilulissat in September is climatically mixed. The average daily high is around 4 °C, and the sea is about 4 °C. With about 10 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
30/100 · #8
Warmth
#4
Dryness
#11
Sun
#6
Sea warmth
#3
Published best categories: none
Ilulissat · SeptemberPhoto: Christoph Strässler from Oberdorf BL, Schweiz · CC BY-SA 2.0Climate facts
- Average high
- 4 °C
- Average low
- 0 °C
- Sea
- 4 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 76 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 9 | 4 | 11 | 63 | 4.6 | 78 | 2.1 | 6 | 34 |
| September (selected) | 4 | 0 | 10 | 47 | 2.5 | 76 | 2.9 | 4 | 30 |
| October | -1 | -5 | 9 | 45 | 0.8 | 78 | 3.5 | 3 | 29 |
How do the previous and next months compare?
Baseline: September (30/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | +4 | +4.9 °C | +3.9 °C | +1 | +15.6 mm | +2.1 h | +1.3 % | -0.8 m/s | +1.5 °C |
| October | -1 | -5.7 °C | -5.2 °C | -1.1 | -2.4 mm | -1.7 h | +1.1 % | +0.6 m/s | -1.8 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Ilulissat in September?
The average daily high is around 4 °C, with an average daily low of about 0 °C.
Can you swim in Ilulissat in September?
The sea is about 4 °C (cold).
Does it rain a lot in Ilulissat in September?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 47 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Ilulissat?
No month in Ilulissat reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.