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Sitka September Weather

Averages and records for weather in Sitka, Alaska in the month of September.

Typical Sitka September Weather 1991–2020
Average daily high	58.1 °F
Average daily low	48.5 °F
Average monthly precipitation	11.7 inches
Daily chance of precipitation	74.7%

Sitka September Weather Records 1899–2024
Highest temperature	82 °F	September 15, 1937
Lowest temperature	28 °F	September 23, 1930
Highest daily low	61 °F	September 10, 2023
Lowest daily high	47 °F	September 26, 1983
Hottest average high temperature	63.9 °F	1926
Coldest average high temperature	53.6 °F	1992
Most daily precipitation	6.2 inches	September 8, 1948
Most monthly precipitation	20.8 inches	1924

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	60.1	50.7	74	37
September 2	60.0	50.6	78	39
September 3	59.9	50.5	80	38
September 4	59.8	50.3	77	36
September 5	59.6	50.2	77	33
September 6	59.5	50.0	75	34
September 7	59.4	49.8	73	34
September 8	59.2	49.7	80	39
September 9	59.1	49.6	76	38
September 10	59.0	49.5	79	34
September 11	58.8	49.3	80	33
September 12	58.6	49.2	74	38
September 13	58.4	49.0	70	33
September 14	58.3	48.9	75	31
September 15	58.2	48.6	82	37
September 16	58.0	48.5	79	33
September 17	57.8	48.2	75	35
September 18	57.6	48.0	73	34
September 19	57.4	47.9	75	34
September 20	57.2	47.7	77	36
September 21	56.9	47.5	75	34
September 22	56.7	47.3	69	32
September 23	56.5	47.1	74	28
September 24	56.3	46.8	75	30
September 25	56.1	46.6	70	33
September 26	55.8	46.4	67	31
September 27	55.6	46.2	67	30
September 28	55.3	46.0	68	35
September 29	55.1	45.8	74	32
September 30	54.8	45.6	70	33

Weather Station Details

Years	Station	Coordinates
1945–2024	Sitka Airport	location
1899–1944	Sitka Magnetic Observatory	location