Anchorage weather in September
September in Anchorage: cool, soaked, with clean air — a great time to visit.
#5 of 12 months in Anchorage · #419 of 604 destinations to visit in September · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Anchorage climate normals — September
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 7°C / 45°F | |
| Feels like (high) | 11°C / 52°F | |
| Rainfall | 151 mm / 6 in | ⛈ soaked |
| Rainy days | 21 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 6°C / 43°F | |
| Sunshine | 6.7 h/day | |
| Daylight | 12.9 h | |
| Wind | 9 km/h / 6 mph | |
| Snowfall | 1.9 cm / 0.7 in | |
| Air quality (US AQI) | 19 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Anchorage?
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Anchorage in September — FAQ
- Is September a good time to visit Anchorage?
- September in Anchorage: cool, soaked, with clean air — a great time to visit. It ranks #5 of 12 months for Anchorage on SeasonMap's comfort score (70/100).
- What is the weather like in Anchorage in September?
- In September, Anchorage averages a daily high of 12.5°C and a low of 7.1°C, with about 151.3 mm of rain over roughly 20.6 rainy days.
- What is the air quality in Anchorage in September?
- Anchorage has a mean US Air Quality Index of about 19 in September.
- Does it snow in Anchorage in September?
- Anchorage sees roughly 1.9 cm of snowfall in September.