Lowest Daily High Temperatures in Castle Rock History

This is a list of the coldest daily high temperatures ever recorded in Castle Rock, Colorado history from 1893–2024 based on data from the NOAA.

Lowest temperatures all-time

Record for the lowest daily high temperature in Castle Rock

The lowest high temperature for a calendar day in Castle Rock, Colorado history was -8 °F which happened on Friday, December 23, 1983.

Rank	Temperature	Date
1	-8 °F	December 23, 1983
2	-6 °F	February 2, 2011
2	-6 °F	January 11, 1963
4	-5 °F	December 21, 1990
4	-5 °F	January 25, 1897
6	-4 °F	December 20, 1990
6	-4 °F	February 3, 1989
8	-2 °F	November 13, 2014
8	-2 °F	February 4, 1989
10	-1 °F	February 5, 1989
11	0 °F	December 22, 1983
11	0 °F	January 6, 1913
13	1 °F	December 22, 1990
14	2 °F	January 24, 1897
15	3 °F	December 23, 2022
15	3 °F	February 9, 2011
15	3 °F	January 13, 1997
18	4 °F	January 14, 2024
18	4 °F	December 9, 2009
18	4 °F	December 21, 1989
18	4 °F	January 12, 1963
18	4 °F	December 9, 1898