< Previous Month Next Month >

Boulder May Weather

Averages and records for weather in Boulder, Colorado in the month of May.

Typical Boulder May Weather 1991–2020
Average daily high	71.1 °F
Average daily low	43.2 °F
Average monthly precipitation	3.2 inches
Average monthly snow	2.0 inches
Daily chance of precipitation	40.7%
Daily chance of snow	2.8%

Boulder May Weather Records 1893–2024
Highest temperature	95 °F	May 29, 2003
Lowest temperature	17 °F	May 2, 2013
Highest daily low	72 °F	May 29, 2000
Lowest daily high	34 °F	May 1, 1954
Hottest average high temperature	78.8 °F	1934
Coldest average high temperature	59.9 °F	1935
Most daily precipitation	3.5 inches	May 17, 1995
Most monthly precipitation	9.6 inches	1995
Most daily snow	14.5 inches	May 5, 1917
Most monthly snow	26.7 inches	1931

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	66.2	38.7	86	23
May 2	66.6	39.1	86	17
May 3	66.9	39.4	86	20
May 4	67.3	39.7	88	28
May 5	67.7	40.0	89	29
May 6	68.0	40.3	87	22
May 7	68.4	40.6	87	28
May 8	68.7	40.9	86	30
May 9	68.9	41.1	88	25
May 10	69.2	41.4	88	27
May 11	69.4	41.7	88	21
May 12	69.7	41.9	88	24
May 13	70.0	42.2	89	27
May 14	70.3	42.6	88	29
May 15	70.8	42.9	93	29
May 16	71.2	43.3	93	30
May 17	71.6	43.6	92	28
May 18	72.0	44.0	90	29
May 19	72.3	44.3	90	26
May 20	72.7	44.5	93	27
May 21	72.9	44.8	90	26
May 22	73.2	45.0	89	30
May 23	73.6	45.3	90	34
May 24	74.0	45.6	90	32
May 25	74.4	45.9	87	32
May 26	74.8	46.2	91	32
May 27	75.2	46.6	92	33
May 28	75.6	46.9	95	30
May 29	75.9	47.1	95	30
May 30	76.2	47.3	91	34
May 31	76.5	47.6	89	34

Weather Station Details

Years	Station	Coordinates
1893–2024	Boulder	location