Weather in September
Temperature
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a refreshing 61°F (16.1°C) in August to a fresh 54.1°F (12.3°C). Iliamna, during the nights of September, experiences an average temperature drop to a cold 41.7°F (5.4°C).Rainfall
In Iliamna, during September, the rain falls for 16 days and regularly aggregates up to 4.41" (112mm) of precipitation. In Iliamna, during the entire year, the rain falls for 133 days and collects up to 25.55" (649mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Iliamna, Alaska, the average length of the day in September is 12h and 49min.On the first day of the month, sunrise is at 7:17 am and sunset at 9:20 pm. On the last day of September, sunrise is at 8:25 am and sunset at 7:53 pm AKDT.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Iliamna in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September?
Average temperature in September
Iliamna, AK
- Average high temperature in September: 54.1°F
The warmest month (with the highest average high temperature) is July (62.5°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in September: 41.7°F
The month with the highest average low temperature is July (48.3°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average rainfall in September
Iliamna, AK
- Average rainfall in September: 4.4"
The wettest month (with the highest rainfall) is August (4.6").
The driest months (with the least rainfall) are February, March and April (1.1").
Average rainfall days in September
Iliamna, AK
- Average rainfall days in September: 16 days
The months with the highest number of rainy days are August and September (16 days).
The months with the least rainy days are March and April (8 days).
Average snowfall in September
Iliamna, AK
- Average snowfall in September: 0"
The month with the highest snowfall is December (11.8").
The months with the least snowfall are June, July, August and September (0").
Average daylight in September
Iliamna, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 36min).
The month with the shortest days is December (Average daylight: 6h and 6min).
Iliamna, Alaska, USA
Weather forecast for your location
2. Allow the app to use your location