Weather on March 21
Greeley, CO
55 Years of Data
Avg High
61°F
Avg Low
28°F
Warmest
2026
61°F avg
Coldest
2006
18°F avg
About This Date
March 21st in Greeley, CO typically brings mild spring weather, with average highs around 61°F and lows near 28°F — a 33°F daily swing. Over 56 years of records, the warmest March 21st was in 2026 (61°F average), while the coldest was 2006 (18°F) — a 43°F range across recorded history. Precipitation has occurred on 16% of recorded March 21st dates, with snow falling 9% of the time (heaviest snowfall: 3"). The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
The last decade has been 5.9°F warmer on this date compared to 20-30 years ago.
Planning for March 21st in Greeley, CO? Great weather for outdoor activities.
Warming Trend
1.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026warmest | 89° | 33° | 61° | — | — |
| 2025 | 61° | 34° | 47° | — | — |
| 2024 | 73° | 32° | 53° | — | — |
| 2023 | 65° | 29° | 47° | — | — |
| 2022 | 66° | 34° | 50° | — | — |
| 2021 | 58° | 33° | 45° | — | — |
| 2020 | 44° | 18° | 31° | 0.58" | 1" |
| 2019 | 65° | 27° | 46° | — | — |
| 2018 | 65° | 30° | 47° | — | — |
| 2017 | 77° | 38° | 57° | — | — |
| 2016 | 73° | 29° | 51° | — | — |
| 2015 | 73° | 32° | 53° | — | — |
| 2014 | 62° | 26° | 44° | — | — |
| 2013 | 58° | 29° | 43° | 0.1" | — |
| 2012 | 70° | 26° | 48° | — | — |
| 2011 | 78° | 32° | 55° | — | — |
| 2010 | 66° | 16° | 41° | — | — |
| 2009 | 82° | 33° | 58° | — | — |
| 2008 | 65° | 27° | 46° | — | — |
| 2007 | 78° | 42° | 60° | — | — |
| 2006coldest | 27° | 10° | 18° | 0.08" | — |
| 2005 | 50° | 36° | 43° | 0.08" | — |
| 2004 | 66° | 29° | 47° | — | — |
| 2003 | 53° | 36° | 44° | — | — |
| 2002 | 29° | 13° | 21° | — | — |
| 2001 | 66° | 31° | 48° | — | — |
| 2000 | 39° | 27° | 33° | 0.25" | 1.5" |
| 1999 | 71° | 30° | 51° | — | — |
| 1998 | 62° | 28° | 45° | — | — |
| 1997 | 61° | 40° | 50° | — | — |
| 1996 | 57° | 32° | 45° | — | — |
| 1995 | 77° | 35° | 56° | — | — |
| 1994 | 71° | 25° | 48° | — | — |
| 1993 | 55° | 35° | 45° | — | — |
| 1992 | 37° | 30° | 34° | 0.03" | 0.3" |
| 1991 | 60° | 29° | 44° | — | — |
| 1990 | 70° | 41° | 55° | — | — |
| 1989 | 62° | 18° | 40° | — | — |
| 1988 | 72° | 31° | 51° | — | — |
| 1987 | 51° | 24° | 38° | — | — |
| 1986 | 70° | 25° | 47° | — | — |
| 1985 | 66° | 26° | 46° | — | — |
| 1984 | 61° | 25° | 43° | — | — |
| 1983 | 41° | 13° | 27° | — | — |
| 1982 | 49° | 14° | 31° | — | — |
| 1981 | 39° | 32° | 36° | 0.97" | 3" |
| 1980 | 62° | 25° | 43° | — | — |
| 1979 | 39° | 32° | 36° | 0.05" | — |
| 1978 | 75° | 31° | 53° | — | — |
| 1977 | 52° | 16° | 34° | — | — |
| 1976 | 46° | 26° | 36° | — | — |
| 1975 | 70° | 34° | 52° | 0.89" | 0.5" |
| 1974 | 47° | 17° | 32° | — | — |
| 1973 | 58° | 32° | 45° | — | — |
| 1972 | 65° | 26° | 45° | — | — |
| 1971 | 62° | 30° | 46° | — | — |
56 years of data from GREELEY UNC