December weather in Grantsville, UT
The average temperature in Grantsville in December is 29.1°F (20.0°F–38.2°F). Average precipitation: 0.83 inches. Average snowfall is 7.9 inches.
December is a winter month in Grantsville, and is cooler than the annual average of 51.2°F. Daily temperatures swing about 18.2°F between overnight low and afternoon high. Expect about 8 days with precipitation. Daylight averages about 9h 6m. For travel, December is cold.
Avg High
38.2°F
Avg Low
20.0°F
Precipitation
0.83 in
Snow
7.9 in
December records in Grantsville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| December 1 | 63.0°F (1999) | 5.0°F (2010) | 0.50 in (1982) |
| December 2 | 59.0°F (2008) | 9.0°F (2019) | 0.50 in (1920) |
| December 3 | 64.0°F (2008) | 9.0°F (2006) | 0.90 in (1909) |
| December 4 | 60.1°F (2017) | 6.1°F (2013) | 0.35 in (2013) |
| December 5 | 55.9°F (2014) | -5.1°F (2013) | 0.79 in (1980) |
| December 6 | 55.9°F (2021) | -4.0°F (2013) | 0.66 in (1956) |
| December 7 | 55.9°F (2003) | 1.0°F (2005) | 0.43 in (1982) |
| December 8 | 53.1°F (2014) | 1.0°F (2005) | 0.39 in (2007) |
| December 9 | 57.0°F (2015) | -7.1°F (2013) | 0.35 in (1963) |
| December 10 | 64.9°F (2015) | -6.0°F (2013) | 0.34 in (2021) |
| December 11 | 63.0°F (2015) | -0.9°F (2009) | 0.55 in (2016) |
| December 12 | 61.0°F (2014) | 0.0°F (2009) | 0.54 in (1992) |
| December 13 | 66.9°F (2010) | 1.0°F (2013) | 0.45 in (1906) |
| December 14 | 53.1°F (2006) | 8.1°F (2013) | 0.38 in (1922) |
| December 15 | 61.0°F (2006) | 3.9°F (1914) | 0.42 in (2021) |
| December 16 | 64.0°F (2006) | 5.0°F (2001) | 0.39 in (1967) |
| December 17 | 61.0°F (2025) | 5.0°F (2013) | 0.81 in (1970) |
| December 18 | 66.0°F (2025) | 3.9°F (2013) | 0.77 in (1921) |
| December 19 | 68.0°F (2025) | 6.1°F (2021) | 0.62 in (2013) |
| December 20 | 68.0°F (2025) | 1.9°F (1914) | 0.52 in (2010) |
| December 21 | 48.9°F (2017) | 3.9°F (2006) | 0.63 in (2010) |
| December 22 | 59.0°F (2025) | -2.0°F (2006) | 0.55 in (1983) |
| December 23 | 68.0°F (2025) | 7.0°F (2001) | 0.98 in (1921) |
| December 24 | 63.0°F (2025) | 1.9°F (1914) | 0.42 in (1964) |
| December 25 | 61.0°F (2025) | 3.0°F (2001) | 0.41 in (1922) |
| December 26 | 59.0°F (2025) | 3.0°F (2001) | 0.95 in (2003) |
| December 27 | 55.9°F (2025) | 3.0°F (2001) | 0.63 in (1983) |
| December 28 | 50.0°F (2024) | 3.0°F (2009) | 0.68 in (1907) |
| December 29 | 57.9°F (2011) | 1.9°F (2021) | 0.81 in (1927) |
| December 30 | 60.1°F (2017) | 7.0°F (2012) | 0.48 in (1992) |
| December 31 | 63.0°F (2011) | 0.0°F (2014) | 0.37 in (2021) |