Castle Rock Weather in January
Average highs run from 45°F on January 1 to 45°F on January 31, and lows from 17°F to 18°F. Normal precipitation for the month is 0.55 in over about 4 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 46°F
- Average low
- 18°F
- Precipitation
- 0.55 in
- Snowfall
- 8.0 in
- Record high
- 73°FJan 27, 2015
- Record low
- -12°FJan 15, 2024
- Chance of a freeze
- 100%
- Daylight
- 9 h 28 min to 10 h 12 min
- Cloud cover
- 57%
- Humidity
- 56%
- Dew point
- 14°F
- Wind
- 9.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jan 1 | 45°F | 17°F | 62°F 2026 | -5°F 2011 | 14% | 13% |
| Jan 2 | 45°F | 17°F | 64°F 2006 | 2°F 2002 | 14% | 13% |
| Jan 3 | 45°F | 17°F | 64°F 2026 | -3°F 2015 | 14% | 13% |
| Jan 4 | 45°F | 18°F | 68°F 2001 | -3°F 2015 | 14% | 12% |
| Jan 5 | 46°F | 18°F | 67°F 2001 | -4°F 2014 | 14% | 12% |
| Jan 6 | 46°F | 18°F | 65°F 2006 | -6°F 2017 | 14% | 12% |
| Jan 7 | 46°F | 18°F | 69°F 2006 | -6°F 2010 | 14% | 12% |
| Jan 8 | 46°F | 18°F | 67°F 2003 | -4°F 2010 | 14% | 12% |
| Jan 9 | 46°F | 18°F | 66°F 2018 | 5°F 2024 | 13% | 12% |
| Jan 10 | 46°F | 18°F | 63°F 2004 | -6°F 2011 | 13% | 12% |
| Jan 11 | 46°F | 18°F | 63°F 1999 | -5°F 2011 | 13% | 12% |
| Jan 12 | 46°F | 18°F | 61°F 2026 | -6°F 2007 | 13% | 12% |
| Jan 13 | 46°F | 18°F | 63°F 2021 | -10°F 2007 | 13% | 12% |
| Jan 14 | 46°F | 18°F | 63°F 2000 | -8°F 2024 | 14% | 12% |
| Jan 15 | 46°F | 18°F | 63°F 2000 | -12°F 2024 | 14% | 12% |
| Jan 16 | 46°F | 18°F | 58°F 2025 | -9°F 2024 | 14% | 12% |
| Jan 17 | 46°F | 18°F | 62°F 2000 | -1°F 2008 | 14% | 12% |
| Jan 18 | 46°F | 18°F | 64°F 2018 | -4°F 2025 | 14% | 12% |
| Jan 19 | 46°F | 18°F | 68°F 2018 | -7°F 2025 | 14% | 13% |
| Jan 20 | 46°F | 18°F | 68°F 2005 | -6°F 2025 | 14% | 13% |
| Jan 21 | 46°F | 18°F | 69°F 2009 | -4°F 2025 | 14% | 13% |
| Jan 22 | 46°F | 18°F | 65°F 2009 | -3°F 2008 | 14% | 13% |
| Jan 23 | 46°F | 18°F | 67°F 2005 | 3°F 2002 | 14% | 13% |
| Jan 24 | 46°F | 18°F | 64°F 2005 | 0°F 2002 | 15% | 13% |
| Jan 25 | 46°F | 18°F | 61°F 2012 | -2°F 2026 | 15% | 13% |
| Jan 26 | 46°F | 18°F | 68°F 2015 | -1°F 2026 | 15% | 13% |
| Jan 27 | 46°F | 18°F | 73°F 2015 | -3°F 2009 | 15% | 13% |
| Jan 28 | 46°F | 18°F | 67°F 2011 | 1°F 2014 | 15% | 14% |
| Jan 29 | 46°F | 18°F | 61°F 2011 | -3°F 2023 | 16% | 14% |
| Jan 30 | 46°F | 18°F | 65°F 2016 | -5°F 2023 | 16% | 14% |
| Jan 31 | 45°F | 18°F | 64°F 2003 | -3°F 2011 | 16% | 14% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- January 1
- sunrise 7:19 AM, sunset 4:47 PM
- January 31
- sunrise 7:07 AM, sunset 5:19 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00051401 (Castle Rock), public domain. Records: NOAA GHCN-Daily, station USW00093067, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.