Weather on December 21
Salt Lake City, UT
55 Years of Data
About This Date
December 21st in Salt Lake City, UT typically brings cold winter weather, with average highs around 38°F and lows near 24°F. Over 55 years of records, the warmest December 21st was in 2025 (51°F average), while the coldest was 1990 (1°F) — a 50°F range across recorded history. Precipitation has occurred on 36% of recorded December 21st dates, with snow falling 31% of the time (heaviest snowfall: 4.3"). The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Salt Lake City, UT? Bundle up with warm layers and protect extremities from the cold. Consider bringing rain gear or an umbrella. Check road conditions if traveling, as snow is possible.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 61° | 42° | 51° | — | — |
| 2024 | 46° | 26° | 36° | — | — |
| 2023 | 54° | 32° | 43° | — | — |
| 2022 | 44° | 29° | 37° | 0.13" | 0.6" |
| 2021 | 38° | 22° | 30° | — | — |
| 2020 | 53° | 35° | 44° | — | — |
| 2019 | 40° | 25° | 33° | — | — |
| 2018 | 49° | 33° | 41° | 0.25" | — |
| 2017 | 37° | 25° | 31° | — | — |
| 2016 | 35° | 29° | 32° | 0.08" | 0.8" |
| 2015 | 43° | 33° | 38° | — | — |
| 2014 | 48° | 38° | 43° | 1.35" | — |
| 2013 | 33° | 25° | 29° | 0.2" | 1.4" |
| 2012 | 41° | 20° | 30° | — | — |
| 2011 | 36° | 22° | 29° | 0.03" | 0.1" |
| 2010 | 35° | 31° | 33° | 0.81" | 2.3" |
| 2009 | 29° | 24° | 26° | — | — |
| 2008 | 32° | 15° | 24° | — | — |
| 2007 | 30° | 14° | 22° | 0.79" | 3.5" |
| 2006 | 29° | 12° | 20° | — | — |
| 2005 | 47° | 26° | 36° | — | — |
| 2004 | 32° | 20° | 26° | 0.05" | 0.5" |
| 2003 | 37° | 32° | 35° | 1.88" | 4.3" |
| 2002 | 39° | 28° | 34° | — | — |
| 2001 | 31° | 16° | 23° | 0.03" | 0.2" |
| 2000 | 47° | 30° | 38° | — | — |
| 1999 | 43° | 27° | 35° | 0.18" | 1" |
| 1998 | 15° | 1° | 8° | — | — |
| 1997 | 31° | 15° | 23° | — | — |
| 1996 | 46° | 34° | 40° | — | — |
| 1995 | 35° | 21° | 28° | 0.08" | 0.4" |
| 1994 | 37° | 11° | 24° | — | — |
| 1993 | 30° | 14° | 22° | — | — |
| 1992 | 37° | 19° | 28° | — | — |
| 1991 | 36° | 18° | 27° | — | — |
| 1990coldest | 11° | -9° | 1° | — | — |
| 1989 | 45° | 27° | 36° | — | — |
| 1988 | 41° | 25° | 33° | 0.48" | 2.6" |
| 1987 | 42° | 31° | 36° | 0.03" | 0.3" |
| 1986 | 29° | 26° | 27° | — | — |
| 1985 | 26° | 23° | 25° | — | — |
| 1984 | 37° | 27° | 32° | 0.05" | 0.8" |
| 1983 | 26° | 7° | 16° | 0.1" | 0.5" |
| 1982 | 52° | 43° | 47° | — | — |
| 1981 | 43° | 34° | 38° | 0.41" | 1.5" |
| 1980 | 38° | 29° | 33° | 0.15" | — |
| 1979 | 40° | 26° | 33° | 0.86" | 4" |
| 1978 | 33° | 20° | 26° | — | — |
| 1977 | 29° | 12° | 20° | — | — |
| 1976 | 35° | 9° | 22° | — | — |
| 1975 | 29° | 21° | 25° | — | — |
| 1974 | 48° | 34° | 41° | — | — |
| 1973 | 40° | 25° | 32° | — | — |
| 1972 | 44° | 32° | 38° | — | — |
| 1971 | 43° | 15° | 29° | — | — |