Weather on September 21
Salt Lake City, UT
55 Years of Data
Avg High
74°F
Avg Low
49°F
Warmest
2013
77°F avg
Coldest
2004
48°F avg
About This Date
September 21st in Salt Lake City, UT typically brings pleasant fall weather, with average highs around 74°F and lows near 49°F — a 25°F daily swing. Over 55 years of records, the warmest September 21st was in 2013 (77°F average), while the coldest was 2004 (48°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 24% of September 21st dates historically, with the wettest September 21st recording 1.6" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Salt Lake City, UT? Great weather for outdoor activities.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 61° | 71° | 0.13" | — |
| 2024 | 78° | 54° | 66° | — | — |
| 2023 | 68° | 52° | 60° | 0.33" | — |
| 2022 | 84° | 66° | 75° | 0.23" | — |
| 2021 | 73° | 44° | 59° | — | — |
| 2020 | 85° | 54° | 69° | — | — |
| 2019 | 65° | 46° | 55° | — | — |
| 2018 | 83° | 51° | 67° | — | — |
| 2017 | 58° | 41° | 49° | 1.3" | — |
| 2016 | 84° | 60° | 72° | 0.05" | — |
| 2015 | 84° | 54° | 69° | — | — |
| 2014 | 71° | 60° | 66° | 0.99" | — |
| 2013warmest | 90° | 64° | 77° | — | — |
| 2012 | 84° | 52° | 68° | — | — |
| 2011 | 81° | 53° | 67° | — | — |
| 2010 | 86° | 50° | 68° | — | — |
| 2009 | 67° | 45° | 56° | — | — |
| 2008 | 75° | 51° | 63° | — | — |
| 2007 | 84° | 51° | 68° | — | — |
| 2006 | 59° | 48° | 54° | — | — |
| 2005 | 74° | 52° | 63° | 0.38" | — |
| 2004coldest | 61° | 36° | 48° | — | — |
| 2003 | 77° | 48° | 63° | — | — |
| 2002 | 73° | 50° | 62° | — | — |
| 2001 | 87° | 57° | 72° | — | — |
| 2000 | 73° | 54° | 63° | 0.66" | — |
| 1999 | 81° | 50° | 65° | — | — |
| 1998 | 55° | 43° | 49° | 1.6" | — |
| 1997 | 63° | 50° | 56° | 0.05" | — |
| 1996 | 79° | 55° | 67° | — | — |
| 1995 | 63° | 38° | 50° | — | — |
| 1994 | 80° | 53° | 67° | — | — |
| 1993 | 71° | 47° | 59° | — | — |
| 1992 | 80° | 53° | 67° | — | — |
| 1991 | 74° | 45° | 59° | — | — |
| 1990 | 76° | 49° | 62° | — | — |
| 1989 | 69° | 45° | 57° | — | — |
| 1988 | 67° | 46° | 56° | — | — |
| 1987 | 80° | 48° | 64° | — | — |
| 1986 | 65° | 40° | 52° | — | — |
| 1985 | 66° | 47° | 56° | — | — |
| 1984 | 65° | 47° | 56° | 0.3" | — |
| 1983 | 70° | 37° | 53° | — | — |
| 1982 | 84° | 56° | 70° | — | — |
| 1981 | 79° | 55° | 67° | — | — |
| 1980 | 63° | 43° | 53° | 0.18" | — |
| 1979 | 88° | 54° | 71° | — | — |
| 1978 | 67° | 33° | 50° | — | — |
| 1977 | 67° | 39° | 53° | 0.23" | — |
| 1976 | 77° | 51° | 64° | — | — |
| 1975 | 71° | 38° | 54° | — | — |
| 1974 | 81° | 47° | 64° | — | — |
| 1973 | 70° | 42° | 56° | — | — |
| 1972 | 76° | 40° | 58° | — | — |
| 1971 | 62° | 45° | 53° | — | — |
55 years of data from SALT LAKE CITY SUB SEW