Earliest and Latest Days at or Below 32° F in Castle Rock

This is a list of the earliest and latest days in a winter season where the low temperature fell to at least 32 °F in Castle Rock, Colorado history. It is based on NOAA data from the years 1893–2024.

Earliest freezing temperature in Castle Rock?

The earliest in a winter season that Castle Rock, Colorado has recorded a low temperature of 32 °F or below is July 4 which happened in 1903.

Latest freezing temperature in Castle Rock?

The latest in a winter season that Castle Rock, Colorado has recorded a low temperature of 32 °F or below is June 27 which happened in 1895.

Earliest Days ≤ 32 °F

Date	Year	Temperature
July 4	1903	32 °F
July 23	1895	30 °F
September 3	1973	31 °F
September 8	2001	32 °F
September 9	2001	29 °F
September 9	1962	31 °F
September 9	1898	32 °F
September 10	1962	30 °F
September 10	1907	29 °F
September 10	1898	31 °F
September 11	1898	28 °F
September 12	2014	31 °F
September 12	1989	31 °F
September 12	1974	29 °F
September 12	1916	32 °F
September 12	1902	26 °F
September 12	1898	31 °F
September 13	1999	32 °F
September 13	1993	30 °F
September 13	1989	31 °F
September 13	1974	29 °F
September 13	1912	30 °F
September 13	1902	31 °F

Latest Days ≤ 32 °F

Date	Year	Temperature
June 27	1895	32 °F
June 19	1973	30 °F
June 17	1912	31 °F
June 15	1976	31 °F
June 14	1983	32 °F
June 13	1917	32 °F
June 11	1975	28 °F
June 10	1979	32 °F
June 10	1910	30 °F
June 9	1974	30 °F
June 8	1998	32 °F
June 8	1916	32 °F
June 8	1906	32 °F
June 7	1998	32 °F
June 7	1982	32 °F
June 7	1974	32 °F
June 7	1915	28 °F
June 7	1906	32 °F
June 6	1998	32 °F
June 6	1917	31 °F
June 6	1915	32 °F