Ketchum August Weather

Averages and records for weather in Ketchum, Idaho in the month of August.
Typical Ketchum August Weather
1991–2020
Average daily high 79.4 °F
Average daily low 42.6 °F
Average monthly precipitation 0.5 inches
Average monthly snow none
Daily chance of precipitation 12.4%
Daily chance of snow 0%
Ketchum August Weather Records
1937–2024
Highest temperature 96 °F August 8, 2001
Lowest temperature 16 °F August 25, 1944
Highest daily low 60 °F August 16, 2003
Lowest daily high 46 °F August 20, 1968
Hottest average high temperature 86.8 °F 1969
Coldest average high temperature 72.6 °F 1976
Most daily precipitation 1.3 inches August 22, 2014
Most monthly precipitation 3.8 inches 1968
Most daily snow none -
Most monthly snow none -
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°F) Record (°F)
High Low High Low
August 1 81.3 45.0 93 27
August 2 81.3 44.9 96 23
August 3 81.2 44.9 94 23
August 4 81.0 44.8 95 23
August 5 81.0 44.6 95 25
August 6 80.9 44.5 94 24
August 7 80.9 44.4 92 25
August 8 80.7 44.3 96 24
August 9 80.6 44.1 93 22
August 10 80.4 43.9 94 23
August 11 80.2 43.7 95 23
August 12 80.0 43.5 95 25
August 13 79.9 43.3 92 26
August 14 79.7 43.2 91 25
August 15 79.5 43.0 91 18
August 16 79.4 42.8 91 21
August 17 79.1 42.6 92 25
August 18 78.8 42.3 92 27
August 19 78.6 42.1 93 23
August 20 78.5 41.9 90 19
August 21 78.4 41.7 91 21
August 22 78.2 41.6 91 20
August 23 78.0 41.4 91 20
August 24 77.8 41.2 92 23
August 25 77.6 40.9 92 16
August 26 77.2 40.7 91 19
August 27 76.9 40.5 92 20
August 28 76.6 40.3 89 20
August 29 76.3 40.0 90 21
August 30 75.9 39.8 90 20
August 31 75.6 39.6 90 20
Weather Station Details
Years Station Coordinates
1973–2024 Ketchum location
1937–1972 Sun Valley location