Fairbanks
Alaska, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Fairbanks, AK

Buildings and trees making the scenic Fairbanks City in Alaska, seen from across the Chena River
Buildings and trees making the scenic Fairbanks City in Alaska, seen from across the Chena River
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.

What is the temperature in September in Fairbanks?

The average high-temperature, in September, in Fairbanks, Alaska, is 54.7°F (12.6°C), while the average low-temperature is 35.1°F (1.7°C).

What is the average humidity in September in Fairbanks?

In September, the average relative humidity in Fairbanks is 68.9%.

How much does it rain in Fairbanks in September?

In September, in Fairbanks, Alaska, the rain falls for 10.4 days. Throughout September, 1.1" (27.9mm) of precipitation is accumulated.

When does it start to snow in Fairbanks?

September is the first month it typically snows in Fairbanks. Throughout September, in the average 1.4 snowfall days, it receives 1.8" (45.7mm) of snow.

What is the average length of the day in September in Fairbanks?

In September, the average length of the day in Fairbanks is 13h.

How long on average sun shines in September in Fairbanks?

The average sunshine in September is 4.1h.

How high is the UV index in September in Fairbanks?

The average daily maximum UV index in September in Fairbanks is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Fairbanks, AK
  • 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).

  • 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).

Average humidity in September - Fairbanks, AK
  • 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%).

Average rainfall in September - Fairbanks, AK
  • 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").

Average rainfall days in September - Fairbanks, AK
  • 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).

Average snowfall in September - Fairbanks, AK
  • 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").

Average snowfall days in September - Fairbanks, AK
  • 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).

Average daylight in September / Average sunshine in September - Fairbanks, AK
  • Average daylight in September: 13h

The month with the longest days is June (Average daylight: 21.5h).
The month with shortest days is December (Average daylight: 4h).

  • 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).

Average UV index in September - Fairbanks, AK
  • 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).