September weather forecastWasilla, AK
September
Weather in September
September enters the scene as an emblematic representation of autumn in Wasilla. Average daily sunshine hours keep decreasing, moving down to roughly 12.9 hours. Leaves begin their color transformation, decorating Wasilla with picturesque views. Temperature trends continue their downward journey, but it's still the perfect weather for various outdoor activities. As Autumn fully sets in, Wasilla becomes a spectacle, dotted with breathtaking fall colors everywhere you turn.Temperature
A mild shift in the average high-temperature occurs in September, reducing from a mild 60.4°F (15.8°C) in August to a fresh 52°F (11.1°C). During the month of September, the nighttime temperature falls to an average of 39.4°F (4.1°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Wasilla, in September, it is raining for 12 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 124.6 rainfall days, and 7.36" (187mm) of precipitation is accumulated.Snowfall
In Wasilla, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 52min.On the first day of the month, sunrise is at 6:51 am and sunset at 9:03 pm. On the last day of September, sunrise is at 8:04 am and sunset at 7:30 pm AKDT.
Sunshine
In Wasilla, the average sunshine in September is 8h.UV index
In Wasilla, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 2 suggests this advice:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
Average pressure in September
Wasilla, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is December (29.69"Hg).
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).
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%).
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").
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).
Average snowfall in September
Wasilla, AK
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.64").
The months with the least snowfall are June, July, August and September (0").
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).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Wasilla, AK
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 24min).
The month with the shortest days is December (Average daylight: 5h and 30min).
- 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).
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).
Average UV index in September
Wasilla, AK
- Average UV index in September: 2
The 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).
Average cloud cover in September
Wasilla, AK
- Average cloud cover in September: 41
The months with the most cloud cover are April and August (Cloud cover 44).
The months with the least cloud cover are January and May (Cloud cover 37).
Average visibility in September
Wasilla, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is March (4mi).
