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September weather forecast in Anchorage

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

31 August, sun

	755 mmHg		80%
	3.3 m/s		+11

31 August, Sunday. day, 15°; night, 10°; rain

1 September, mon

	755 mmHg		80%
	3.2 m/s		+11

1 September, Monday. day, 14°; night, 10°; rain

2 September, tue

	756 mmHg		80%
	3.2 m/s		+12

2 September, Tuesday. day, 14°; night, 10°; rain

3 September, wed

	757 mmHg		81%
	3.1 m/s		+11

3 September, Wednesday. day, 14°; night, 10°; partly cloudy

4 September, thu

	757 mmHg		80%
	2.9 m/s		+11

4 September, Thursday. day, 14°; night, 10°; rain

5 September, fri

	757 mmHg		81%
	2.9 m/s		+12

5 September, Friday. day, 14°; night, 10°; rain

6 September, sat

	757 mmHg		80%
	3.2 m/s		+11

6 September, Saturday. day, 14°; night, 10°; rain

7 September, sun

	756 mmHg		79%
	3.2 m/s		+11

7 September, Sunday. day, 14°; night, 10°; partly cloudy

8 September, mon

	757 mmHg		80%
	2.9 m/s		+11

8 September, Monday. day, 14°; night, 9°; rain

9 September, tue

	756 mmHg		80%
	2.9 m/s		+11

9 September, Tuesday. day, 14°; night, 9°; rain

10 September, wed

	756 mmHg		78%
	3.2 m/s		+11

10 September, Wednesday. day, 14°; night, 9°; clear

11 September, thu

	757 mmHg		80%
	2.8 m/s		+11

11 September, Thursday. day, 14°; night, 9°; clear

12 September, fri

	757 mmHg		80%
	3.2 m/s		+11

12 September, Friday. day, 14°; night, 9°; rain

13 September, sat

	756 mmHg		81%
	3.2 m/s		+11

13 September, Saturday. day, 13°; night, 9°; rain

14 September, sun

	757 mmHg		79%
	3 m/s		+11

14 September, Sunday. day, 13°; night, 8°; rain

15 September, mon

	756 mmHg		78%
	3 m/s		+11

15 September, Monday. day, 13°; night, 8°; rain

16 September, tue

	754 mmHg		79%
	3 m/s		+11

16 September, Tuesday. day, 13°; night, 8°; overcast

17 September, wed

	753 mmHg		80%
	3.6 m/s		+11

17 September, Wednesday. day, 12°; night, 8°; rain

18 September, thu

	752 mmHg		77%
	3.5 m/s		+11

18 September, Thursday. day, 12°; night, 8°; rain

19 September, fri

	754 mmHg		78%
	3.2 m/s		+10

19 September, Friday. day, 12°; night, 7°; partly cloudy

20 September, sat

	754 mmHg		79%
	3.7 m/s		+10

20 September, Saturday. day, 12°; night, 7°; rain

21 September, sun

	753 mmHg		78%
	3.4 m/s		+10

21 September, Sunday. day, 11°; night, 7°; rain

22 September, mon

	751 mmHg		75%
	4 m/s		+10

22 September, Monday. day, 11°; night, 7°; partly cloudy

23 September, tue

	751 mmHg		75%
	4 m/s		+9

23 September, Tuesday. day, 11°; night, 6°; rain

24 September, wed

	751 mmHg		76%
	3.9 m/s		+9

24 September, Wednesday. day, 10°; night, 6°; rain

25 September, thu

	752 mmHg		79%
	4 m/s		+9

25 September, Thursday. day, 10°; night, 6°; rain

26 September, fri

	754 mmHg		79%
	3.4 m/s		+9

26 September, Friday. day, 10°; night, 6°; clear

27 September, sat

	755 mmHg		77%
	3.5 m/s		+9

27 September, Saturday. day, 10°; night, 5°; clear

28 September, sun

	755 mmHg		77%
	3.1 m/s		+9

28 September, Sunday. day, 9°; night, 5°; partly cloudy

29 September, mon

	756 mmHg		78%
	3.2 m/s		+9

29 September, Monday. day, 9°; night, 5°; partly cloudy

30 September, tue

	756 mmHg		78%
	3.4 m/s		+9

30 September, Tuesday. day, 9°; night, 4°; partly cloudy

1 October, wed

	756 mmHg		77%
	3.5 m/s		+9

1 October, Wednesday. day, 9°; night, 5°; rain

2 October, thu

	756 mmHg		79%
	3.4 m/s		+9

2 October, Thursday. day, 9°; night, 4°; rain

3 October, fri

	756 mmHg		79%
	3.2 m/s		+9

3 October, Friday. day, 9°; night, 4°; partly cloudy

4 October, sat

	756 mmHg		79%
	3.5 m/s		+8

4 October, Saturday. day, 9°; night, 4°; rain

Average data for 10 years

Anchorage September

4

sunny days

18

days with precipitation

14

cloudy days

4 sunny days; 18 days with precipitation; 14 cloudy days;

79

%

air humidity

2.09

m/s

WindSE

124

mm of precipitation

(15% of annual average)

+10

°C

Water temperature

air humidity 79%; 124 millimeters of precipitation (15% of annual average); Wind south-easterly 2.09 Meters per second; Water temperature +10°

Weather graphs for September

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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SE

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SE

SE

SE

S

SE

SE

S

SE

SE

SE

S

S

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

SE

1

Average data for 10 years

2

3

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11

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30

Daytime temperature

Night-time temperature

Cities near you

Fairbanks
Kodiak
Tanana
Kenai
McGrath
Kudjak Island
Wasilla
Soldotna
Port Alsworth

Cities with similar weather in September

Helsinki
Riga
Tallinn
Stockholm
Cholpon-Ata
Oslo
Yurmala
Palanga
Dublin

The weather forecast for September 2025 is based on historical data from the past 10 years.

September in Anchorage is the rainiest month of the year. In September, the weather in Anchorage is typically warm. Average daily high temperature in September is about 12 degrees above zero. On average, Anchorage has 18 rainy, 7 partly cloudy, 4 sunny, and 1 cloudy day in September. The rains are usually heavy. September as well as July, August, and October is considered the most uncomfortable time to visit Anchorage.

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