Fairbanks, AK weather in September
Expect cool weather with frequent rain in Fairbanks in September, with highs near 55°F and lows near 36°F. Rain or snow falls on about 11 days. Snowfall averages about 2.3 in.
- Normal high
- 55°F
- Normal low
- 36°F
- Wet days
- 11
- 1.4 in total
- Snowfall
- 2.3 in
- snow on the ground 1 day
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 62°F | 47°F |
| Normal low | 42°F | 30°F |
| Chance of a wet day | 38% | 33% |
| Sunrise / sunset | 6:31 am / 9:10 pm | 7:57 am / 7:23 pm |
| Daylight | 14.7 h | 11.4 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Alaska Time).
A typical September day
- 6 am39°Fdew point 35°F
- 9 am43°Fdew point 36°F
- Noon50°Fdew point 37°F
- 3 pm54°Fdew point 36°F
- 6 pm52°Fdew point 37°F
- 9 pm45°Fdew point 38°F
NOAA hourly normals (local standard time) from Fairbanks Intl Airport (5 mi away); average wind 5 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F5 of 30
- Hot dayshigh 90°F or more0 of 30
- Muggy daysdaily mean dew point 65°F or more0 of 30
- Wet daysat least 0.01 in of rain or melted snow11 of 30
- Notable rainat least 0.10 in4 of 30
- Freezing nightslow 32°F or below9 of 30
- Snow on the groundsnow depth 1 in or more1 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain and snow in September
Normal precipitation is 1.4 in; a dry September brings about 0.8 in and a wet one about 1.7 in (25th and 75th percentiles). About 1 day brings half an inch or more. Normal snowfall is 2.3 in, with about 1 day of an inch or more.
How September varies from year to year
- Warmest September, 1991-20201995: average high 64°F
- Coolest September1992: average high 41°F
- Wettest September2015: 3.7 in
- Driest September2001: 0.3 in
- Highest reading78°F (September 21, 1995)
- Lowest reading3°F (September 30, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 66°F | 55°F | 34°F |
| Normal low | 48°F | 36°F | 18°F |
| Wet days | 14 | 11 | 10 |
| Comfortable days | 17 | 5 | 0 |
| Daylight | 16.5 h | 13.0 h | 9.7 h |
Highs change by -11°F from August and -21°F into October.
How Fairbanks ranks in September
- Normal high377th warmest of 378 cities; 7th of 8 in Alaska
- Wet days326th driest of 378
- Comfortable days204th most of 342
What to pack for Fairbanks in September
- A warm jacket – lows near 36°F, highs near 55°F
- A rain jacket or umbrella – rain or snow on about 11 days
Frost in September
The first fall frost typically comes around Sep 13; in 1 year in 10 it comes before Aug 29. All frost dates for Fairbanks.
Heating and cooling
September has 578 heating degree days and 0 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How cold is Fairbanks in September?
The normal high is 55°F and the normal low is 36°F. From 1991 to 2020 the coldest September reading was 3°F (September 30, 1992).
Does it rain a lot in Fairbanks in September?
About 11 days in September have at least 0.01 in of precipitation, and the normal total is 1.4 in. The wettest September in 1991-2020 was in 2015 (3.7 in); the driest was in 2001 (0.3 in).
Does it snow in Fairbanks in September?
Yes. Normal snowfall in September is 2.3 in, and snow covers the ground on about 1 day.
Is September a good time to visit Fairbanks?
September ranks 5th of 12 months on our comfort score for Fairbanks (57 out of 100). It has about 5 comfortable days. The best months are June and July.
Where the numbers come from
- Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Fairbanks Intl Airport (USW00026411), 5.2 mi WSW of the city center, 432 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Fairbanks International (702610-26411), 5.3 mi WSW of the city center, 430 ft . Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).