Avg High
Anchorage in September
Verdict
In Anchorage, September has a distinct autumn feel. As the season moves along, temperatures are dropping quickly. You can usually expect a cool month that feels variable day to day. It often has a mild but frequently damp, typical of changeable seasons feel, especially for outdoor plans.
Well suited to visitors who prefer a steady feel over dramatic shifts. Wind can make exposed areas feel cooler and more blustery.
Avg Low
Rain
Daylight
13h
What to expect
- Daytime feel - Fresh conditions that stay fairly consistent through the day. It can feel cooler than the thermometer suggests.
- Rain pattern - Very wet. Waterproof footwear becomes genuinely useful. Outdoor plans benefit from flexibility.
- Sun exposure - A bright month overall. You'll feel fine, but it's still easy to get caught out. Even short walks can add up.
- Cloud cover - Frequently overcast. You’ll get moments of bright sun and moments of softer light. It’s more about steady conditions than sparkling skies.
September in context
How it compares to the rest of the year in Anchorage.
Hottest (avg)
#4 / 12
Wettest (avg)
#1 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#7 / 12
Highest UV
#6 / 12
Most Humid
#3 / 12
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight
- 12.9 hours
- UV index (max)
- 4
- Typical sun hours
- 06:28 – 19:19
Rain & Snow
- Total
-
- Rainy days
- 19
- Cloud cover
- 73%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 82%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is September a good time to visit Anchorage?
Typical September days in Anchorage reach highs of 12°C (54°F) with nights around 6°C (43°F). It usually feels cool by day and cold after dark. It is among the wetter months, so it is wise to have some indoor backup plans or flexible activities.
What are temperatures like in September?
Daytime temperatures in September typically peak near 12°C (54°F), while nights drop to around 6°C (43°F). Expect cool afternoons and cold evenings.
How much does it rain in September?
Rainfall in September averages 137 mm (5.4 in) across roughly 19 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in September?
You can expect about 13 hours of daylight in September. Sunrise is typically around 06:28 and sunset near 19:19. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in September?
UV levels are moderate (around 4); sunscreen and sunglasses are still a good idea.
Is it windy in September?
In September, average wind speeds are around 6 km/h (4 mph), with gusts on the windiest days reaching about 44 km/h (27 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.