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Dillon May Weather

Averages and records for weather in Dillon, Montana in the month of May.

Typical Dillon May Weather 1991–2020
Average daily high	63.7 °F
Average daily low	37.0 °F
Average monthly precipitation	1.7 inches
Daily chance of precipitation	35.4%

Dillon May Weather Records 1895–2024
Highest temperature	90 °F	May 19, 1954
Lowest temperature	14 °F	May 2, 1954
Highest daily low	63 °F	May 28, 1902
Lowest daily high	29 °F	May 21, 2021
Hottest average high temperature	74.6 °F	1934
Coldest average high temperature	56.1 °F	2010
Most daily precipitation	1.8 inches	May 9, 1908
Most monthly precipitation	9.2 inches	1908

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	59.3	32.5	81	15
May 2	59.7	32.8	85	14
May 3	60.0	33.1	84	18
May 4	60.3	33.5	85	22
May 5	60.6	33.8	86	19
May 6	60.8	34.1	86	19
May 7	61.0	34.3	84	22
May 8	61.2	34.5	83	20
May 9	61.5	34.8	82	23
May 10	61.7	35.1	83	19
May 11	62.0	35.4	83	20
May 12	62.3	35.7	84	22
May 13	62.6	36.0	87	20
May 14	63.0	36.4	82	20
May 15	63.4	36.7	84	20
May 16	63.7	37.1	85	20
May 17	64.0	37.4	87	19
May 18	64.3	37.7	89	23
May 19	64.5	38.0	90	22
May 20	64.7	38.3	89	24
May 21	65.0	38.6	84	24
May 22	65.4	38.8	85	25
May 23	65.6	39.1	87	23
May 24	66.0	39.3	85	27
May 25	66.4	39.7	84	19
May 26	66.6	40.0	88	26
May 27	66.8	40.3	88	24
May 28	66.9	40.5	89	25
May 29	67.1	40.7	87	23
May 30	67.3	40.8	88	28
May 31	67.5	40.9	87	25

Weather Station Details

Years	Station	Coordinates
1941–2024	Dillon Airport	location
1895–1940	University of Montana Western	location