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

September weather forecast and climate
Glennallen, AK

September, the first month of the autumn, in Glennallen, is still a cool month, with average temperature ranging between min 29.8°F (-1.2°C) and max 55.2°F (12.9°C).

Temperature

In September, the average high-temperature drops, from an enjoyable 66.6°F (19.2°C) in August, to a cool 55.2°F (12.9°C). In Glennallen, in September, the average low-temperature is 29.8°F (-1.2°C).

Rainfall

During September, Glennallen regularly aggregates up to 1.2" (29.5mm) of precipitation. During the entire year, Glennallen aggregates up to 11.1" (282.5mm) of precipitation.

Snowfall

Months with snowfall in Glennallen are January through May, September through December. September is the first month it typically snows in Glennallen. Throughout September, Glennallen receives 0.5" (12.7mm) of snow. Throughout the year, 52.1" (1323.4mm) of snow is accumulated.

Daylight

The average length of the day in September is 12.9h.

What is the temperature in September in Glennallen?

In September, in Glennallen, Alaska, the average high-temperature is 55.2°F (12.9°C), and the average low-temperature is 29.8°F (-1.2°C).

How much does it rain in Glennallen in September?

In Glennallen, in September, 1.2" (29.5mm) of precipitation is typically accumulated.

When does it start snowing in Glennallen?

September is the first month it typically snows. Throughout September, Glennallen receives 0.5" (12.7mm) of snow.

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

In Glennallen, the average length of the day in September is 12.9h.
Average temperature in September - Glennallen, AK
  • Average high temperature in September: 55.3°F

The warmest month (with the highest average high temperature) is July (70.6°F).
The month with the lowest average high temperature is January (4.3°F).

  • Average low temperature in September: 29.9°F

The month with the highest average low temperature is July (42.9°F).
The coldest month (with the lowest average low temperature) is January (-17.3°F).

Average rainfall in September - Glennallen, AK
  • Average rainfall in September: 1.2"

Wettest months (with the highest rainfall) are July and August (1.7").
The driest month (with the lowest rainfall) is April (0.2").

Average snowfall in September - Glennallen, AK
  • Average snowfall in September: 0.5"

The month with the highest snowfall is December (11.2").
Months with the lowest snowfall are June, July and August (0").

Average daylight in September - Glennallen, AK
  • Average daylight in September: 12.9h

The month with the longest days is June (Average daylight: 19.6h).
The month with shortest days is December (Average daylight: 5.3h).