December weather in Monticello, UT
The average temperature in Monticello in December is 27.7°F (17.0°F–38.3°F). Average precipitation: 1.39 inches.
December is a winter month in Monticello, and is cooler than the annual average of 47.3°F. Daily temperatures swing about 21.3°F between overnight low and afternoon high. Daylight averages about 9h 23m. For travel, December is cold.
Avg High
38.3°F
Avg Low
17.0°F
Precipitation
1.39 in
Daylight
9h 23m
December records in Monticello
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 55.9°F (2017) | 6.1°F (2015) | 0.16 in (2023) |
| December 2 | 61.0°F (2021) | 10.9°F (2019) | 0.41 in (2018) |
| December 3 | 55.9°F (2017) | 9.0°F (2018) | 0.80 in (2011) |
| December 4 | 57.9°F (2021) | 5.0°F (2018) | 0.20 in (2011) |
| December 5 | 55.9°F (2021) | -4.0°F (2013) | 0.53 in (2019) |
| December 6 | 55.0°F (2021) | -5.1°F (2013) | 0.06 in (2013) |
| December 7 | 53.1°F (2020) | -5.1°F (2013) | 0.13 in (2022) |
| December 8 | 52.0°F (2020) | 6.1°F (2016) | 0.26 in (2013) |
| December 9 | 55.0°F (2020) | -6.0°F (2013) | 0.16 in (2019) |
| December 10 | 54.0°F (2017) | -5.1°F (2013) | 0.65 in (2021) |
| December 11 | 57.0°F (2025) | -5.1°F (2013) | 0.30 in (2020) |
| December 12 | 57.9°F (2017) | 3.0°F (2021) | 0.14 in (2022) |
| December 13 | 57.9°F (2025) | 3.9°F (2022) | 0.45 in (2011) |
| December 14 | 55.9°F (2025) | 10.0°F (2022) | 0.52 in (2014) |
| December 15 | 53.1°F (2025) | 8.1°F (2011) | 0.70 in (2012) |
| December 16 | 53.1°F (2025) | 8.1°F (2012) | 0.35 in (2012) |
| December 17 | 55.0°F (2025) | 1.0°F (2022) | 0.70 in (2016) |
| December 18 | 50.0°F (2025) | 1.9°F (2022) | 0.15 in (2014) |
| December 19 | 57.0°F (2025) | 1.0°F (2016) | 0.80 in (2012) |
| December 20 | 57.0°F (2025) | 1.0°F (2012) | 0.00 in (2011) |
| December 21 | 54.0°F (2025) | 0.0°F (2012) | 0.15 in (2023) |
| December 22 | 51.1°F (2024) | 0.0°F (2012) | 0.30 in (2017) |
| December 23 | 54.0°F (2025) | 10.9°F (2011) | 0.45 in (2016) |
| December 24 | 55.9°F (2025) | 3.0°F (2015) | 0.31 in (2021) |
| December 25 | 48.0°F (2025) | 6.1°F (2012) | 0.70 in (2019) |
| December 26 | 48.9°F (2025) | 3.9°F (2016) | 0.21 in (2016) |
| December 27 | 48.9°F (2022) | 1.9°F (2012) | 0.32 in (2019) |
| December 28 | 48.9°F (2017) | -0.9°F (2015) | 0.47 in (2019) |
| December 29 | 50.0°F (2017) | 1.9°F (2012) | 1.02 in (2012) |
| December 30 | 51.1°F (2024) | 1.9°F (2014) | 0.06 in (2022) |
| December 31 | 51.1°F (2011) | 6.1°F (2019) | 0.29 in (2021) |