< Previous Month Next Month >

Ketchikan August Weather

Averages and records for weather in Ketchikan, Alaska in the month of August.

Typical Ketchikan August Weather 1991–2020
Average daily high	64.7 °F
Average daily low	52.9 °F
Average monthly precipitation	11.4 inches
Daily chance of precipitation	54.2%

Ketchikan August Weather Records 1910–2024
Highest temperature	89 °F	August 18, 1977
Lowest temperature	34 °F	August 31, 1913
Highest daily low	67 °F	August 10, 1981
Lowest daily high	53 °F	August 7, 1918
Hottest average high temperature	75.5 °F	1977
Coldest average high temperature	59.7 °F	1955
Most daily precipitation	8.1 inches	August 5, 1920
Most monthly precipitation	33.9 inches	1920

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	65.7	53.7	84	41
August 2	65.7	53.7	84	42
August 3	65.8	53.7	81	40
August 4	65.8	53.8	86	39
August 5	65.7	53.7	86	42
August 6	65.7	53.7	86	40
August 7	65.6	53.7	88	42
August 8	65.5	53.6	80	43
August 9	65.4	53.6	82	43
August 10	65.4	53.5	84	43
August 11	65.3	53.4	82	45
August 12	65.1	53.3	82	39
August 13	65.0	53.2	83	41
August 14	65.0	53.1	89	43
August 15	64.8	53.0	88	41
August 16	64.6	52.9	86	40
August 17	64.4	52.8	87	39
August 18	64.2	52.7	89	40
August 19	64.0	52.5	88	42
August 20	63.8	52.4	82	41
August 21	63.6	52.2	84	40
August 22	63.4	52.1	81	41
August 23	63.3	52.0	82	41
August 24	63.1	51.9	79	42
August 25	62.9	51.8	83	40
August 26	62.7	51.6	80	39
August 27	62.5	51.5	79	39
August 28	62.3	51.4	81	43
August 29	62.1	51.2	81	39
August 30	61.9	51.0	81	39
August 31	61.8	50.7	79	34

Weather Station Details

Years	Station	Coordinates
1910–2024	Ketchikan International Airport	location