| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 45.6 | 16.9 | 73 | -37 | 0.6 | 7.2 |
| February | 46.7 | 18.8 | 75 | -32 | 0.7 | 9.2 |
| March | 54.0 | 25.8 | 82 | -20 | 1.5 | 10.0 |
| April | 59.3 | 31.8 | 91 | -8 | 2.1 | 9.2 |
| May | 68.9 | 41.1 | 94 | 7 | 2.0 | 1.1 |
| June | 80.3 | 49.4 | 101 | 25 | 2.3 | 0.0 |
| July | 86.0 | 55.4 | 102 | 30 | 2.2 | 0.0 |
| August | 83.6 | 53.9 | 99 | 34 | 2.5 | 0.0 |
| September | 77.2 | 46.1 | 101 | 11 | 1.4 | 0.5 |
| October | 65.3 | 34.3 | 88 | -5 | 0.8 | 2.8 |
| November | 54.3 | 25.0 | 85 | -18 | 0.7 | 6.5 |
| December | 46.0 | 17.2 | 82 | -29 | 0.6 | 8.3 |
| Entire year | 64.2 | 34.6 | 102 | -37 | 17.2 | 51.5 |
|
More Castle Rock Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 72 °F | July 19, 2022 |
| Lowest daily high | -8 °F | December 23, 1983 |
| Greatest daily range (Difference of high and low) |
71 °F | January 2, 1911 |
| Greatest difference in daily high over two conscutive days |
56 °F | Feb 22–23, 2023 |
| Most daily precipitation | 7.0 inches | June 16, 1965 |
| Most monthly precipitation | 10.1 inches | June 1965 |
| Most yearly precipitation | 30.4 inches | 1965 |
| Most yearly days with precipitation | 109 | 2023 |
| Earliest snow in season | September 8 | 2001 |
| Latest snow in season | May 30 | 1975 |
| Most daily snow | 36.0 inches | October 23, 1906 |
| Most monthly snow | 61.0 inches | April 1900 |
| Most yearly snow | 126.0 inches | 1928 |
| Most snow in a winter | 123.0 inches | 1928–1929 |
| Greatest snow accumulation | 44.0 inches | March 20, 2003 |
| Earliest freeze | September 3 | 1973 |
| Earliest day ≥ 80 °F | March 21 | 1997 |
| Earliest day ≥ 90 °F | April 27 | 1981 |
| Earliest day ≥ 100 °F | June 12 | 2022 |
| Latest freeze | July 23 | 1895 |
| Latest day ≥ 80 °F | December 3 | 2021 |
| Latest day ≥ 90 °F | September 28 | 2021 |
| Latest day ≥ 100 °F | September 12 | 2021 |
| Most days in a year < 0 °F | 37 | 1913 |
| Most days in a year < 32 °F | 220 | 1912 |
| Most days in a year ≥ 80 °F | 130 | 2021 |
| Most days in a year ≥ 90 °F | 73 | 2020 |
| Most days in a year ≥ 100 °F | 6 | 2022 |
|
Castle Rock Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 9 days | Aug 3–11, 2017 |
| Without precipitation | 57 days | Dec 19, 1908 – Feb 13, 1909 |
| With snow | 7 days | Apr 4–10, 1900 |
| High temperature at or below freezing |
12 days | Dec 28, 1969 – Jan 8, 1970 |
| High temperature ≥ 80 °F | 78 days | Jul 2 – Sep 17, 1924 |
| High temperature ≥ 90 °F | 21 days | Aug 5–25, 2020 |
| Years | Station | Coordinates |
|---|---|---|
| 1893–2024 | Castle Rock | location |