Weather on December 21
Tucson, AZ
55 Years of Data
Avg High
66°F
Avg Low
42°F
Warmest
2025
65°F avg
Coldest
1990
40°F avg
About This Date
December 21st in Tucson, AZ typically brings mild winter weather, with average highs around 66°F and lows near 42°F. Over 55 years of records, the warmest December 21st was in 2025 (65°F average), while the coldest was 1990 (40°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 11% of December 21st dates historically, with the wettest December 21st recording 0.81" of rain. The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.8°F warmer on this date compared to 20-30 years ago.
Planning for December 21st in Tucson, AZ? Great weather for outdoor activities.
Warming Trend
0.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 81° | 50° | 65° | — | — |
| 2024 | 83° | 45° | 64° | — | — |
| 2023 | 77° | 45° | 61° | — | — |
| 2022 | 67° | 34° | 50° | — | — |
| 2021 | 75° | 42° | 59° | — | — |
| 2020 | 79° | 37° | 58° | — | — |
| 2019 | 73° | 34° | 53° | — | — |
| 2018 | 71° | 43° | 57° | — | — |
| 2017 | 59° | 35° | 47° | — | — |
| 2016 | 70° | 54° | 62° | 0.56" | — |
| 2015 | 67° | 37° | 52° | — | — |
| 2014 | 64° | 40° | 52° | — | — |
| 2013 | 54° | 44° | 49° | — | — |
| 2012 | 70° | 35° | 52° | — | — |
| 2011 | 57° | 36° | 46° | — | — |
| 2010 | 72° | 54° | 63° | — | — |
| 2009 | 71° | 44° | 58° | — | — |
| 2008 | 67° | 29° | 48° | — | — |
| 2007 | 57° | 39° | 48° | 0.03" | — |
| 2006 | 55° | 29° | 42° | — | — |
| 2005 | 78° | 42° | 60° | — | — |
| 2004 | 66° | 47° | 56° | — | — |
| 2003 | 69° | 45° | 57° | — | — |
| 2002 | 55° | 34° | 44° | — | — |
| 2001 | 64° | 44° | 54° | — | — |
| 2000 | 70° | 37° | 53° | — | — |
| 1999 | 62° | 33° | 48° | — | — |
| 1998 | 58° | 45° | 51° | — | — |
| 1997 | 60° | 39° | 50° | — | — |
| 1996 | 72° | 39° | 55° | — | — |
| 1995 | 58° | 41° | 49° | — | — |
| 1994 | 78° | 45° | 61° | — | — |
| 1993 | 51° | 48° | 50° | 0.28" | — |
| 1992 | 65° | 38° | 51° | — | — |
| 1991 | 52° | 46° | 49° | 0.2" | — |
| 1990coldest | 45° | 36° | 40° | 0.74" | — |
| 1989 | 63° | 39° | 51° | — | — |
| 1988 | 66° | 38° | 52° | — | — |
| 1987 | 64° | 42° | 53° | — | — |
| 1986 | 59° | 43° | 51° | — | — |
| 1985 | 78° | 42° | 60° | — | — |
| 1984 | 58° | 39° | 48° | — | — |
| 1983 | 66° | 48° | 57° | — | — |
| 1982 | 72° | 47° | 59° | — | — |
| 1981 | 75° | 49° | 62° | — | — |
| 1980 | 74° | 52° | 63° | — | — |
| 1979 | 69° | 52° | 60° | — | — |
| 1978 | 58° | 33° | 45° | — | — |
| 1977 | 65° | 50° | 57° | — | — |
| 1976 | 66° | 43° | 54° | — | — |
| 1975 | 56° | 49° | 52° | 0.81" | — |
| 1974 | 67° | 40° | 53° | — | — |
| 1973 | 74° | 36° | 55° | — | — |
| 1972 | 74° | 39° | 56° | — | — |
| 1971 | 70° | 39° | 54° | — | — |
55 years of data from TUCSON WFO