Granby Weather in December
Average highs run from 32°F on December 1 to 25°F on December 31, and lows from 13°F to 4°F. Normal precipitation for the month is 0.82 in over about 10 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 28°F
- Average low
- 8°F
- Precipitation
- 0.82 in
- Snowfall
- 25.5 in
- Record high
- 58°FDec 24, 1971
- Record low
- -35°FDec 23, 1990
- Chance of a freeze
- 100%
- Daylight
- 9 h 32 min to 9 h 22 min
- Cloud cover
- 63%
- Humidity
- 89%
- Dew point
- 10°F
- Wind
- 5.8 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 |
|---|---|---|---|---|---|---|
| Dec 1 | 32°F | 13°F | 53°F 1998 | -8°F 2004 | 31% | 30% |
| Dec 2 | 32°F | 12°F | 51°F 1998 | -15°F 1948 | 31% | 30% |
| Dec 3 | 32°F | 12°F | 51°F 1998 | -10°F 2006 | 31% | 30% |
| Dec 4 | 31°F | 12°F | 49°F 1998 | -12°F 1948 | 31% | 31% |
| Dec 5 | 31°F | 11°F | 52°F 2012 | -17°F 2013 | 31% | 31% |
| Dec 6 | 31°F | 11°F | 51°F 2003 | -23°F 1950 | 31% | 31% |
| Dec 7 | 30°F | 11°F | 47°F 1981 | -22°F 1951 | 32% | 32% |
| Dec 8 | 30°F | 10°F | 47°F 1996 | -31°F 1978 | 32% | 32% |
| Dec 9 | 30°F | 10°F | 48°F 1981 | -30°F 1951 | 32% | 32% |
| Dec 10 | 29°F | 10°F | 45°F 1975 | -23°F 1951 | 32% | 33% |
| Dec 11 | 29°F | 9°F | 46°F 1995 | -18°F 1978 | 32% | 33% |
| Dec 12 | 29°F | 9°F | 45°F 2025 | -12°F 1979 | 32% | 33% |
| Dec 13 | 28°F | 9°F | 47°F 1948 | -24°F 1964 | 33% | 34% |
| Dec 14 | 28°F | 8°F | 46°F 2025 | -19°F 1972 | 33% | 34% |
| Dec 15 | 28°F | 8°F | 47°F 1962 | -27°F 1972 | 33% | 34% |
| Dec 16 | 28°F | 8°F | 45°F 1962 | -18°F 1972 | 33% | 34% |
| Dec 17 | 27°F | 7°F | 45°F 1962 | -17°F 2005 | 33% | 35% |
| Dec 18 | 27°F | 7°F | 44°F 1980 | -22°F 1964 | 33% | 35% |
| Dec 19 | 27°F | 7°F | 48°F 2025 | -14°F 1968 | 33% | 35% |
| Dec 20 | 27°F | 6°F | 47°F 2025 | -27°F 1992 | 33% | 35% |
| Dec 21 | 27°F | 6°F | 49°F 2025 | -22°F 1977 | 33% | 35% |
| Dec 22 | 26°F | 6°F | 51°F 2025 | -28°F 1990 | 34% | 35% |
| Dec 23 | 26°F | 6°F | 51°F 2025 | -35°F 1990 | 34% | 35% |
| Dec 24 | 26°F | 5°F | 58°F 1971 | -33°F 1990 | 34% | 35% |
| Dec 25 | 26°F | 5°F | 50°F 2025 | -29°F 1948 | 34% | 35% |
| Dec 26 | 26°F | 5°F | 46°F 1980 | -24°F 1948 | 34% | 35% |
| Dec 27 | 26°F | 5°F | 43°F 2006 | -21°F 2015 | 34% | 35% |
| Dec 28 | 26°F | 4°F | 42°F 1965 | -28°F 1954 | 34% | 35% |
| Dec 29 | 26°F | 4°F | 45°F 1965 | -26°F 1954 | 34% | 35% |
| Dec 30 | 25°F | 4°F | 46°F 2017 | -28°F 1982 | 34% | 35% |
| Dec 31 | 25°F | 4°F | 44°F 1980 | -22°F 2014 | 34% | 35% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:07 AM, sunset 4:39 PM
- December 31
- sunrise 7:26 AM, sunset 4:48 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00053500 (Grand Lake 6 Ssw), public domain. Records: NOAA GHCN-Daily, station USC00053500, 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.