Norway
Ålesund in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Ålesund in September is climatically mixed. The average daily high is around 13 °C, and the sea is about 14 °C. With about 20 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
25/100 · #4
Warmth
#3
Dryness
#7
Sun
#6
Sea warmth
#2
Published best categories: none
Ålesund · SeptemberPhoto: Lukas Beck · CC BY 4.0Climate facts
- Average high
- 13 °C
- Average low
- 9 °C
- Sea
- 14 °C
- Rainy days (est.)
- 20 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 83 %
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 | 16 | 12 | 21 | 151 | 4.4 | 83 | 2.1 | 15 | 33 |
| September (selected) | 13 | 9 | 20 | 165 | 2.7 | 83 | 2.6 | 14 | 25 |
| October | 9 | 6 | 21 | 170 | 1.2 | 84 | 3.0 | 12 | 14 |
How do the previous and next months compare?
Baseline: September (25/100)
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 | +8 | +2.5 °C | +2.1 °C | +1.1 | -13.3 mm | +1.7 h | -0.1 % | -0.5 m/s | +0.8 °C |
| October | -11 | -4.6 °C | -3.8 °C | +1.5 | +5.3 mm | -1.5 h | +1 % | +0.4 m/s | -2.1 °C |
All twelve months in context
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Where to stay in Ålesund
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Useful next decisions
Frequently asked questions
How warm is Ålesund in September?
The average daily high is around 13 °C, with an average daily low of about 9 °C.
Can you swim in Ålesund in September?
The sea is about 14 °C (cold).
Does it rain a lot in Ålesund in September?
The curated estimate is about 20 rainy days per month, not a directly measured long-term average. Total precipitation averages around 165 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Ålesund?
No month in Ålesund reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.