September weather forecastFairbanks, AK
September
Weather in September
September in Fairbanks displays an eminent shift from summer to fall. A surge in the cloud percentage and a slight increase in snowfall indicates the incoming season change. Despite shorter daylight hours and the cooling trend, Fairbanks retains much of its warmth from the summer. It’s a transitional period with the weather slowly veering towards the colder side.Temperature
September comes with a drop in the average high-temperature, falling from August's refreshing 63.9°F (17.7°C) to a cool 52.5°F (11.4°C). Nighttime temperatures consistently average a cold 36.3°F (2.4°C) during September.Humidity
In Fairbanks, the average relative humidity in September is 75%.Rainfall
In September, in Fairbanks, Alaska, the rain falls for 13.1 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. Throughout the year, there are 100.5 rainfall days, and 10.87" (276mm) of precipitation is accumulated.Snowfall
January through May, August through December are months with snowfall. In Fairbanks, in September, snow falls for 1.6 days, with typically accumulated 0.79" (20mm) of snow. In Fairbanks, during the entire year, snow falls for 74.3 days and aggregates up to 24.49" (622mm) of snow.Daylight
In Fairbanks, the average length of the day in September is 13h and 0min.On the first day of September, sunrise is at 6:33 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 8:00 am and sunset at 7:20 pm AKDT.
Sunshine
In Fairbanks, the average sunshine in September is 7.4h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 in September converts into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fairbanks, AK
- Average high temperature in September: 52.5°F
The warmest month (with the highest average high temperature) is July (70.7°F).
The month with the lowest average high temperature is January (2.1°F).
- Average low temperature in September: 36.3°F
The month with the highest average low temperature is July (50.5°F).
The coldest month (with the lowest average low temperature) is January (-9°F).
Average pressure in September
Fairbanks, AK
- Average pressure in September: 29.77"Hg
The month with the highest atmospheric pressure is February (29.97"Hg).
The month with the lowest atmospheric pressure is September (29.77"Hg).
Average wind speed in September
Fairbanks, AK
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is May (5mph).
The calmest months (with the lowest average wind speed) are October, November and December (4.2mph).
Average humidity in September
Fairbanks, AK
- Average humidity in September: 75%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is June (56%).
Average rainfall in September
Fairbanks, AK
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is August (2.44").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Fairbanks, AK
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is August (16.4 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in September
Fairbanks, AK
- Average snowfall in September: 0.79"
The month with the highest snowfall is November (6.5").
The months with the least snowfall are June and July (0").
Average snowfall days in September
Fairbanks, AK
- Average snowfall days in September: 1.6 days
The month with the highest number of snowfall days is November (13.3 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Fairbanks, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 30min).
The month with the shortest days is December (Average daylight: 4h and 0min).
- Average sunshine in September: 7h and 24min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in September
Fairbanks, AK
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is April (12.2 days).
Average UV index in September
Fairbanks, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Fairbanks, AK
- Average cloud cover in September: 48
The months with the most cloud cover are March, April and November (Cloud cover 53).
The month with the least cloud cover is May (Cloud cover 39).
Average visibility in September
Fairbanks, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
