Monthly Historical AveragesCastle Rock, CO
Average Temperature
High
19°
Feels 18
Low
5°
Feels 3
Average Precipitation
11 Days
45mm
2.2cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, May 17, 2026
Day
17°Feels 16
Wind
17 km/h W
Gust
25 km/h
Humidity
37%
P.O.P
90%
Rain
2-4 mm
Night
6°Feels 3
Wind
24 km/h N
Gust
36 km/h
Humidity
97%
P.O.P
90%
Rain
~1 mm
Historical AveragesMay 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity