SeasonMapFairbanks weather in September
United States
September in Fairbanks: cool, a little rain, with clean air — a great time to visit.
#5 of 12 months in Fairbanks · #853 of 1383 destinations to visit in September · comfort 75/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Fairbanks in September
Other months in Fairbanks
July is Fairbanks' warm month — the forum puts it in the 20s°C with occasional pushes into the 30s, against a record average high of 23 — but the thing people actually come for is the light: it does not get dark at all, sunset lands around 11:45pm, and the daylight figure is roughly twenty hours. That same light rules out the other reason people come to Fairbanks. There is no darkness in July, so the odds of seeing the aurora are zero; aurora season here runs 21 August to 21 April. The other caveat locals supply is that mid-July to mid-August is what they call monsoon season, the wettest stretch of the summer, and the record agrees at ten rainy days.
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Fairbanks climate normals — September
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 5°C / 41°F | |
| Rainfall | 40 mm / 1.6 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 4°C / 38°F | |
| Sunshine | 7.5 h/day | |
| Daylight | 13 h | |
| Wind | 12 km/h / 7 mph | |
| Snowfall | 0.8 cm / 0.3 in | |
| Air quality (US AQI) | 22 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Fairbanks in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break in United States(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Fairbanks's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherFairbanks's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Fairbanks in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Aurora season
21 Aug – 21 AprBook earlySitting under the auroral oval, the town claims better than nine nights in ten over a three-night stay if you actually go out after midnight. Get away from the streetlights — Cleary Summit or the hot springs road — and give it more than one night. Source ↗
Where is Fairbanks?
Fairbanks in September — FAQ
- Is September a good time to visit Fairbanks?
- September in Fairbanks: cool, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Fairbanks on SeasonMap's comfort score (75/100).
- What is the weather like in Fairbanks in September?
- In September, Fairbanks averages a daily high of 12.9°C and a low of 4.9°C, with about 40.2 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Fairbanks in September?
- Fairbanks has a mean US Air Quality Index of about 22 in September.