< Previous Month Next Month >

Castle Rock August Weather

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

Typical Castle Rock August Weather 1991–2020
Average daily high	83.6 °F
Average daily low	53.9 °F
Average monthly precipitation	2.5 inches
Average monthly snow	none
Daily chance of precipitation	32.4%
Daily chance of snow	0%

Castle Rock August Weather Records 1893–2024
Highest temperature	99 °F	August 19, 2021
Lowest temperature	34 °F	August 26, 1910
Highest daily low	70 °F	August 19, 2010
Lowest daily high	49 °F	August 16, 2008
Hottest average high temperature	90.9 °F	2021
Coldest average high temperature	77.4 °F	1915
Most daily precipitation	4.0 inches	August 3, 1897
Most monthly precipitation	8.1 inches	1897
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)
Day	High	Low	High	Low
August 1	85.0	55.6	98	40
August 2	84.9	55.5	98	40
August 3	84.8	55.4	98	36
August 4	84.7	55.4	96	42
August 5	84.6	55.2	95	43
August 6	84.4	55.1	98	40
August 7	84.3	55.1	98	43
August 8	84.3	55.0	98	40
August 9	84.2	54.8	99	41
August 10	84.2	54.7	97	40
August 11	84.1	54.7	97	43
August 12	84.0	54.6	97	41
August 13	84.0	54.5	94	40
August 14	84.0	54.4	97	43
August 15	83.9	54.2	96	42
August 16	83.8	54.1	97	38
August 17	83.7	54.0	98	40
August 18	83.5	53.8	97	40
August 19	83.5	53.7	99	44
August 20	83.5	53.6	98	38
August 21	83.4	53.4	95	36
August 22	83.4	53.3	93	35
August 23	83.3	53.1	96	39
August 24	83.2	52.9	96	38
August 25	82.9	52.6	95	35
August 26	82.7	52.4	95	34
August 27	82.4	52.2	94	35
August 28	82.3	52.0	97	38
August 29	82.1	51.7	99	35
August 30	81.9	51.5	95	38
August 31	81.7	51.2	96	36

Weather Station Details

Years	Station	Coordinates
1893–2024	Castle Rock	location