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Castle Rock May Weather

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

Typical Castle Rock May Weather 1991–2020
Average daily high	68.9 °F
Average daily low	41.1 °F
Average monthly precipitation	2.0 inches
Average monthly snow	1.1 inches
Daily chance of precipitation	26.9%
Daily chance of snow	2.0%

Castle Rock May Weather Records 1893–2024
Highest temperature	94 °F	May 20, 2020
Lowest temperature	7 °F	May 3, 1907
Highest daily low	67 °F	May 29, 2010
Lowest daily high	32 °F	May 4, 1908
Hottest average high temperature	78.6 °F	2020
Coldest average high temperature	54.7 °F	1907
Most daily precipitation	3.6 inches	May 12, 2023
Most monthly precipitation	7.5 inches	1969
Most daily snow	12.0 inches	May 8, 1927
Most monthly snow	13.5 inches	1898

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	63.3	36.1	88	12
May 2	63.7	36.4	87	19
May 3	64.0	36.7	79	7
May 4	64.3	37.1	81	18
May 5	64.8	37.5	86	23
May 6	65.2	37.8	87	16
May 7	65.5	38.1	85	16
May 8	65.9	38.4	89	20
May 9	66.2	38.7	87	21
May 10	66.5	39.0	85	19
May 11	66.9	39.3	84	21
May 12	67.2	39.6	84	21
May 13	67.5	40.0	85	24
May 14	67.9	40.3	86	21
May 15	68.4	40.7	86	14
May 16	68.7	41.0	87	23
May 17	69.2	41.4	91	19
May 18	69.8	41.8	86	22
May 19	70.2	42.0	93	20
May 20	70.5	42.3	94	25
May 21	70.8	42.6	90	19
May 22	71.0	42.8	86	20
May 23	71.3	43.2	90	21
May 24	71.8	43.5	88	24
May 25	72.3	43.8	88	32
May 26	72.7	44.2	87	30
May 27	73.2	44.5	90	24
May 28	73.6	44.8	88	24
May 29	73.9	45.0	89	23
May 30	74.2	45.3	94	22
May 31	74.5	45.5	90	24

Weather Station Details

Years	Station	Coordinates
1893–2024	Castle Rock	location