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Anchorage in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Anchorage in September is climatically mixed. The average daily high is around 11 °C, and the sea is about 12 °C. With about 18 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
22/100 · #7
Warmth
#4
Dryness
#12
Sun
#6
Sea warmth
#3
Published best categories: none
Anchorage · SeptemberPhoto: Wonderlane · CC BY 2.0Climate facts
- Average high
- 11 °C
- Average low
- 6 °C
- Sea
- 12 °C
- Rainy days (est.)
- 18 rainy days (est.)
- Sun (est.)
- 3 h/day
- Humidity
- 84 %
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 | 15 | 9 | 17 | 114 | 4.7 | 82 | 1.4 | 14 | 35 |
| September (selected) | 11 | 6 | 18 | 115 | 3.0 | 84 | 1.7 | 12 | 22 |
| October | 4 | -1 | 15 | 85 | 1.4 | 88 | 1.7 | 8 | 17 |
How do the previous and next months compare?
Baseline: September (22/100)
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 | +13 | +4.6 °C | +3.9 °C | -0.5 | -1.6 mm | +1.7 h | -2 % | -0.2 m/s | +1.7 °C |
| October | -5 | -7.2 °C | -6.2 °C | -2.1 | -29.8 mm | -1.6 h | +3.9 % | +0.1 m/s | -4 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Anchorage in September?
The average daily high is around 11 °C, with an average daily low of about 6 °C.
Can you swim in Anchorage in September?
The sea is about 12 °C (cold).
Does it rain a lot in Anchorage in September?
The curated estimate is about 18 rainy days per month, not a directly measured long-term average. Total precipitation averages around 115 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Anchorage?
No month in Anchorage reaches the threshold for a clear recommendation in the climate score; the month comparison above shows the differences.