Alaska, USA
Long term weather forecast
Long term weather forecast

September weather forecast and Climate
Anchorage, AK

  • Average high temperature in September: 55.6°F

Warmest month (with highest average high temperature) is July (65.4°F).
Month with lowest average high temperature is January (22.7°F).

  • Average low temperature in September: 41.1°F

Month with highest average low temperature is July (51.3°F).
Coldest month (with lowest average low temperature) is January (11.4°F).

  • Average humidity in September: 75.9%

Months with highest relative humidity are November and December (77.1%).
Month with lowest relative humidity is May (61.6%).

  • Average rainfall in September: 3"

Wettest month (with highest rainfall) is August (3.3").
Driest month (with lowest rainfall) is April (0.5").

  • Average rainfall days in September: 14.5 days

Month with highest number of rainy days is September (14.5 days).
Month with lowest number of rainy days is April (5.5 days).

  • Average snowfall in September: 0.5"

Month with highest snowfall is December (20.5").
Months with lowest snowfall are June, July and August (0").

  • Average snowfall days in September: 0.2 days

Month with highest number of snowfall days is December (10.5 days).
Months with lowest number of snowfall days are June, July and August (0 days).

  • Average sea temperature in September: 52°F

Best months for swimming (with highest average sea temperature) are August and September (52°F).
Coldest months (with lowest average sea temperature) are February, March and April (39°F).

  • Average daylight in September: 13h

Month with longest days is June (Average daylight: 19h).
Month with shortest days is December (Average daylight: 6h).

  • Average sunshine in September: 5.3h

Month with most sunshine is May (Average sunshine: 9.3h).
Month with least sunshine is December (Average sunshine: 1.7h).

  • Average UV index in September: 2

Months with highest UV index are June and July (UV index 5).
Months with lowest UV index are January, February, November and December (UV index 0).