December weather in Grand Junction, CO
The average temperature in Grand Junction in December is 30.1°F (21.0°F–39.1°F). Average precipitation: 0.68 inches.
December is a winter month in Grand Junction, and is cooler than the annual average of 54.6°F. Daily temperatures swing about 18.1°F between overnight low and afternoon high. Daylight averages about 9h 16m. For travel, December is cold.
Avg High
39.1°F
Avg Low
21.0°F
Precipitation
0.68 in
Daylight
9h 16m
December records in Grand Junction
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 59.0°F (2012) | 16.0°F (2015) | 0.06 in (2023) |
| December 2 | 60.1°F (2017) | 16.0°F (2015) | 0.08 in (2018) |
| December 3 | 60.1°F (2017) | 17.1°F (2020) | 0.18 in (2013) |
| December 4 | 55.9°F (2021) | 3.0°F (2013) | 0.40 in (2013) |
| December 5 | 54.0°F (2023) | -0.9°F (2013) | 0.07 in (2019) |
| December 6 | 54.0°F (2012) | 0.0°F (2013) | 0.06 in (2021) |
| December 7 | 55.0°F (2023) | 9.0°F (2013) | 0.22 in (2022) |
| December 8 | 53.1°F (2012) | 3.0°F (2013) | 0.11 in (2019) |
| December 9 | 52.0°F (2014) | -0.9°F (2013) | 0.46 in (2021) |
| December 10 | 50.0°F (2014) | -2.9°F (2013) | 0.05 in (2021) |
| December 11 | 55.0°F (2025) | 3.9°F (2013) | 0.08 in (2015) |
| December 12 | 55.0°F (2017) | 1.9°F (2013) | 0.04 in (2020) |
| December 13 | 57.0°F (2012) | -0.9°F (2013) | 0.30 in (2014) |
| December 14 | 57.9°F (2021) | 5.0°F (2013) | 0.19 in (2011) |
| December 15 | 53.1°F (2021) | 9.0°F (2013) | 0.13 in (2012) |
| December 16 | 55.9°F (2016) | 9.0°F (2013) | 0.28 in (2016) |
| December 17 | 48.9°F (2023) | 8.1°F (2013) | 0.04 in (2014) |
| December 18 | 48.9°F (2024) | 10.9°F (2022) | 0.16 in (2012) |
| December 19 | 50.0°F (2024) | 10.9°F (2012) | 0.26 in (2012) |
| December 20 | 53.1°F (2025) | 3.9°F (2012) | 0.00 in (2011) |
| December 21 | 55.9°F (2025) | 3.0°F (2012) | 0.03 in (2013) |
| December 22 | 63.0°F (2025) | 1.9°F (2012) | 0.21 in (2014) |
| December 23 | 55.0°F (2025) | 8.1°F (2012) | 0.46 in (2023) |
| December 24 | 64.9°F (2025) | 10.0°F (2011) | 0.50 in (2021) |
| December 25 | 60.1°F (2025) | 10.9°F (2020) | 0.39 in (2018) |
| December 26 | 57.9°F (2025) | 10.9°F (2011) | 0.09 in (2024) |
| December 27 | 48.9°F (2025) | 5.0°F (2015) | 0.20 in (2022) |
| December 28 | 48.0°F (2017) | 1.0°F (2015) | 0.59 in (2022) |
| December 29 | 46.9°F (2017) | 5.0°F (2012) | 0.11 in (2014) |
| December 30 | 48.9°F (2011) | 3.0°F (2014) | 0.05 in (2022) |
| December 31 | 54.0°F (2017) | -0.9°F (2014) | 0.47 in (2021) |