Weather on April 20
Longmont, CO
55 Years of Data
Avg High
62°F
Avg Low
33°F
Warmest
2008
62°F avg
Coldest
2021
23°F avg
About This Date
April 20th in Longmont, CO typically brings mild spring weather, with average highs around 62°F and lows near 33°F — a 29°F daily swing. Over 55 years of records, the warmest April 20th was in 2008 (62°F average), while the coldest was 2021 (23°F) — a 39°F range across recorded history. Precipitation has occurred on 31% of recorded April 20th dates, with snow falling 4% of the time (heaviest snowfall: 6.1"). The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.6°F cooler on this date compared to 20-30 years ago.
Planning for April 20th in Longmont, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 51° | 29° | 40° | — | — |
| 2024 | 41° | 30° | 36° | 0.71" | 2.4" |
| 2023 | 57° | 29° | 43° | 0.18" | — |
| 2022 | 82° | 36° | 59° | — | — |
| 2021coldest | 34° | 12° | 23° | 1.8" | 6.1" |
| 2020 | 59° | 34° | 46° | — | — |
| 2019 | 77° | 39° | 58° | — | — |
| 2018 | 65° | 32° | 48° | — | — |
| 2017 | 62° | 35° | 49° | 0.08" | — |
| 2016 | 58° | 33° | 45° | — | — |
| 2015 | 56° | 32° | 44° | — | — |
| 2014 | 71° | 40° | 55° | 0.23" | — |
| 2013 | 56° | 32° | 44° | — | — |
| 2012 | 70° | 36° | 53° | — | — |
| 2011 | 54° | 31° | 42° | 0.03" | — |
| 2010 | 70° | 37° | 53° | — | — |
| 2009 | 73° | 40° | 56° | — | — |
| 2008warmest | 75° | 48° | 62° | — | — |
| 2007 | 69° | 31° | 50° | — | — |
| 2006 | 66° | 30° | 48° | — | — |
| 2005 | 64° | 40° | 52° | 0.25" | — |
| 2004 | 67° | 44° | 55° | — | — |
| 2003 | 61° | 37° | 49° | 0.18" | — |
| 2002 | 43° | 21° | 32° | — | — |
| 2001 | 80° | 39° | 60° | — | — |
| 2000 | 55° | 28° | 42° | — | — |
| 1999 | 78° | 28° | 53° | — | — |
| 1998 | 60° | 25° | 42° | 0.1" | — |
| 1997 | 82° | 37° | 60° | — | — |
| 1996 | 55° | 22° | 38° | — | — |
| 1995 | 41° | 30° | 36° | — | — |
| 1994 | 77° | 39° | 58° | — | — |
| 1993 | 58° | 25° | 41° | — | — |
| 1992 | 59° | 34° | 46° | — | — |
| 1991 | 55° | 36° | 45° | — | — |
| 1990 | 68° | 31° | 49° | — | — |
| 1989 | 79° | 40° | 59° | — | — |
| 1988 | 73° | 37° | 55° | — | — |
| 1987 | 80° | 33° | 57° | 1.02" | — |
| 1986 | 69° | 40° | 54° | 0.41" | — |
| 1985 | 63° | 33° | 48° | 0.05" | — |
| 1984 | 60° | 23° | 42° | 0.41" | — |
| 1983 | 70° | 33° | 51° | — | — |
| 1982 | 45° | 26° | 35° | — | — |
| 1981 | 59° | 45° | 52° | 0.94" | — |
| 1980 | 80° | 38° | 59° | — | — |
| 1979 | 72° | 35° | 53° | — | — |
| 1978 | 58° | 30° | 44° | — | — |
| 1977 | 47° | 36° | 41° | 0.97" | — |
| 1976 | 61° | 37° | 49° | — | — |
| 1975 | 59° | 34° | 46° | — | — |
| 1974 | 70° | 34° | 52° | — | — |
| 1973 | 45° | 34° | 39° | — | — |
| 1972 | 39° | 34° | 36° | 0.13" | — |
| 1971 | 56° | 37° | 46° | 0.66" | — |
55 years of data from LONGMONT 2 ESE