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Ketchum May Weather

Averages and records for weather in Ketchum, Idaho in the month of May.

Typical Ketchum May Weather 1991–2020
Average daily high	62.6 °F
Average daily low	34.3 °F
Average monthly precipitation	1.7 inches
Average monthly snow	0.2 inches
Daily chance of precipitation	25.5%
Daily chance of snow	0.70%

Ketchum May Weather Records 1937–2024
Highest temperature	89 °F	May 30, 2003
Lowest temperature	5 °F	May 23, 1944
Highest daily low	56 °F	May 30, 2003
Lowest daily high	35 °F	May 6, 1965
Hottest average high temperature	71.1 °F	1958
Coldest average high temperature	53.7 °F	2010
Most daily precipitation	1.4 inches	May 24, 1976
Most monthly precipitation	5.7 inches	2005
Most daily snow	8.0 inches	May 4, 1975
Most monthly snow	17.0 inches	1955

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
May 1	58.3	30.5	74	13
May 2	58.7	30.8	80	17
May 3	59.1	31.1	80	12
May 4	59.4	31.5	79	13
May 5	59.7	31.7	80	14
May 6	59.9	32.0	81	15
May 7	60.2	32.2	80	17
May 8	60.3	32.3	80	17
May 9	60.5	32.5	78	16
May 10	60.8	32.7	78	12
May 11	61.1	32.9	82	10
May 12	61.4	33.1	81	7
May 13	61.6	33.3	80	14
May 14	61.9	33.6	77	14
May 15	62.1	33.8	83	18
May 16	62.4	34.1	87	16
May 17	62.8	34.4	85	16
May 18	63.1	34.7	83	15
May 19	63.5	35.0	86	16
May 20	63.8	35.3	85	18
May 21	64.0	35.5	81	12
May 22	64.3	35.8	82	16
May 23	64.5	36.0	82	5
May 24	64.7	36.1	83	8
May 25	64.9	36.4	84	17
May 26	65.0	36.5	82	19
May 27	65.2	36.6	82	18
May 28	65.3	36.7	83	17
May 29	65.4	36.9	86	20
May 30	65.5	37.0	89	20
May 31	65.7	37.0	84	20

Weather Station Details

Years	Station	Coordinates
1973–2024	Ketchum	location
1937–1972	Sun Valley	location