September weather forecast and climate
Wasilla, AK

The famed Chugach Mountain Ranges in Wasilla, Alaska
The famed Chugach Mountain Ranges in Wasilla, Alaska

Weather in September

The first month of the autumn, September, is still a cool month in Wasilla, Alaska, with average temperature fluctuating between 39.4°F (4.1°C) and 52°F (11.1°C).

Temperature

In September, the average high-temperature slightly decreases, from a mild 60.4°F (15.8°C) in August, to a cool 52°F (11.1°C). In September, the average low-temperature is 39.4°F (4.1°C).

Humidity

In September, the average relative humidity in Wasilla, Alaska, is 76%.

Rainfall

In Wasilla, Alaska, during September, the rain falls for 12 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Wasilla, Alaska, during the entire year, the rain falls for 124.6 days and collects up to 7.36" (187mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day in Wasilla is 12.9h.

Sunshine

The average sunshine in September is 8h.

UV index

In Wasilla, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in September in Wasilla?

In Wasilla, Alaska, in September, the average high-temperature is 52°F (11.1°C), and the average low-temperature is 39.4°F (4.1°C).

What is the average humidity in September in Wasilla?

In September, the average relative humidity in Wasilla, Alaska, is 76%.

How much does it rain in Wasilla in September?

In Wasilla, Alaska, during September, the rain falls for 12 days and regularly aggregates up to 0.75" (19mm) of precipitation.

Does it snow in Wasilla in September?

In Wasilla, Alaska, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Wasilla?

In Wasilla, Alaska, snow does not fall in June through September.

How many hours of daylight does Wasilla have in September?

In September, the average length of the day in Wasilla, Alaska, is 12.9h.

How many hours of sunshine does Wasilla have in September?

In Wasilla, Alaska, the average sunshine in September is 8h.

What is the UV index intensity in September in Wasilla?

In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Wasilla, AK

Average temperature in September - Wasilla, AK
  • Average high temperature in September: 52°F

The warmest month (with the highest average high temperature) is July (63.3°F).
The month with the lowest average high temperature is January (18.3°F).

  • Average low temperature in September: 39.4°F

The month with the highest average low temperature is July (47.1°F).
The coldest month (with the lowest average low temperature) is January (8.6°F).

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Average pressure in September
Wasilla, AK

Average pressure in September - Wasilla, AK
  • Average pressure in September: 29.75"

The month with the highest atmospheric pressure is July (29.96").
The month with the lowest atmospheric pressure is December (29.69").

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Average wind speed in September
Wasilla, AK

Average wind speed in September - Wasilla, AK
  • Average wind speed in September: 4.2mph

The windiest months (with the highest average wind speed) are January, November and December (4.8mph).
The calmest month (with the lowest average wind speed) is July (4mph).

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Average humidity in September
Wasilla, AK

Average humidity in September - Wasilla, AK
  • Average humidity in September: 76%

The month with the highest relative humidity is March (87%).
The month with the lowest relative humidity is May (65%).

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Average rainfall in September
Wasilla, AK

Average rainfall in September - Wasilla, AK
  • Average rainfall in September: 0.75"

The wettest month (with the highest rainfall) is August (0.94").
The driest month (with the least rainfall) is January (0.31").

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Average rainfall days in September
Wasilla, AK

Average rainfall days in September - Wasilla, AK
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is June (14 days).
The month with the least rainy days is February (6.8 days).

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Average snowfall in September
Wasilla, AK

Average snowfall in September - Wasilla, AK
  • Average snowfall in September: 0"

The month with the highest snowfall is December (2.64").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Wasilla, AK

Average snowfall days in September - Wasilla, AK
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (9.8 days).
Months with the least snowfall days are June, July and August (0 days).

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Average daylight in September /
Average sunshine in September
Wasilla, AK

Average daylight in September / Average sunshine in September - Wasilla, AK
  • Average daylight in September: 12.9h

The month with the longest days is June (Average daylight: 19.4h).
The month with the shortest days is December (Average daylight: 5.5h).

  • Average sunshine in September: 8h

The month with the most sunshine is May (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 4h).

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Average sunshine days in September
Wasilla, AK

Average sunshine days in September - Wasilla, AK
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is January (19.9 days).
The month with the least sunshine days is June (9.3 days).

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Average UV index in September
Wasilla, AK

Average UV index in September - Wasilla, AK
  • Average UV index in September: 2

Months with the highest UV index are June and July (UV index 4).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Wasilla, AK

Average cloud cover in September - Wasilla, AK
  • Average cloud cover in September: 41

Months with the most cloud cover are April and August (Cloud cover 44).
Months with the least cloud cover are January and May (Cloud cover 37).

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Average visibility in September
Wasilla, AK

Average visibility in September - Wasilla, AK
  • Average visibility in September: 6mi

Months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is March (4mi).

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