Fairbanks
Alaska, USA
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Fairbanks, AK

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September sees the first snowfall in Fairbanks with the arrival of the autumn season. The conditions are cold with the average temperatures in the range of 35.1°F (1.7°C) to 55°F (12.8°C) amid partly cloudy skies.
Fall days are colder than the spring, and September is the time when the leaves change color into beautiful shades of yellow, orange, and crimson. The days are short, with hardly 4 hours of sunlight that is insufficient to heat the landscape. Lucky tourists can witness fall colors and the Northern Lights during one trip of Fairbanks in September.
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  • The average high temperature in September: 54.6°F

The warmest month (with the highest average high temperature) is July (72.7°F).
The month with the lowest average high temperature is January (1.1°F).

  • The average low temperature in September: 35.1°F

The month with the highest average low temperature is July (52.3°F).
The coldest month (with the lowest average low temperature) is January (-16.9°F).

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  • The average humidity in September: 68.9%

The month with the highest relative humidity is October (74.1%).
The month with the lowest relative humidity is May (50.2%).

  • The average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is July (2.2").
Driest months (with the lowest rainfall) are March and April (0.3").

  • The average rainfall days in September: 10.4 days

The month with the highest number of rainy days is August (13.3 days).
The month with the lowest number of rainy days is April (3.6 days).

  • The average snowfall in September: 1.8"

The month with the highest snowfall is November (13.2").
Months with the lowest snowfall are June, July and August (0").

  • The average snowfall days in September: 1.4 days

The month with the highest number of snowfall days is November (11.9 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

  • The average daylight in September: 13h

The month with the longest days is June (Average daylight: 21h).
The month with shortest days is December (Average daylight: 4h).

  • The average sunshine in September: 4.1h

The month with most sunshine is June (Average sunshine: 11.1h).
The month with least sunshine is December (Average sunshine: 1.2h).

  • The average UV index in September: 2

Months with the highest UV index are June and July (UV index 4).
Months with the lowest UV index are January, February, November and December (UV index 0).

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