Weather on May 11
Longmont, CO
55 Years of Data
Avg High
70°F
Avg Low
40°F
Warmest
1991
70°F avg
Coldest
1979
36°F avg
About This Date
May 11th in Longmont, CO typically brings pleasant spring weather, with average highs around 70°F and lows near 40°F — a 30°F daily swing. Over 54 years of records, the warmest May 11th was in 1991 (70°F average), while the coldest was 1979 (36°F) — a 34°F range across recorded history. Precipitation has occurred on 33% of recorded May 11th dates, with snow falling 7% of the time (heaviest snowfall: 1.7"). The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.2°F cooler on this date compared to 20-30 years ago.
Planning for May 11th in Longmont, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 46° | 63° | — | — |
| 2024 | 63° | 37° | 50° | — | — |
| 2023 | 59° | 47° | 53° | 1.52" | — |
| 2022 | 71° | 44° | 58° | — | — |
| 2021 | 46° | 33° | 40° | 1.96" | 0.6" |
| 2020 | 64° | 35° | 50° | — | — |
| 2019 | 56° | 34° | 45° | — | — |
| 2018 | 88° | 49° | 68° | — | — |
| 2017 | 64° | 45° | 54° | 1.32" | — |
| 2016 | 61° | 38° | 49° | — | — |
| 2015 | 58° | 30° | 44° | — | — |
| 2014 | 51° | 31° | 41° | 3.96" | 1.7" |
| 2013 | 67° | 42° | 54° | 0.05" | — |
| 2012 | 76° | 38° | 57° | 0.25" | — |
| 2011 | 68° | 33° | 51° | 3.07" | 0.2" |
| 2010 | 59° | 39° | 49° | 0.33" | — |
| 2008 | 74° | 30° | 52° | — | — |
| 2007 | 81° | 45° | 63° | — | — |
| 2006 | 68° | 29° | 48° | — | — |
| 2005 | 65° | 44° | 54° | 3.12" | — |
| 2004 | 83° | 54° | 68° | — | — |
| 2003 | 50° | 32° | 41° | 0.56" | — |
| 2002 | 63° | 43° | 53° | — | — |
| 2001 | 82° | 44° | 63° | — | — |
| 2000 | 79° | 41° | 60° | — | — |
| 1999 | 58° | 29° | 43° | 0.18" | — |
| 1998 | 78° | 42° | 60° | — | — |
| 1997 | 82° | 44° | 63° | — | — |
| 1996 | 67° | 47° | 57° | 0.03" | — |
| 1995 | 66° | 40° | 53° | — | — |
| 1994 | 77° | 41° | 59° | — | — |
| 1993 | 71° | 33° | 52° | — | — |
| 1992 | 65° | 37° | 51° | — | — |
| 1991warmest | 88° | 52° | 70° | — | — |
| 1990 | 70° | 41° | 55° | — | — |
| 1989 | 72° | 43° | 57° | — | — |
| 1988 | 62° | 34° | 48° | 0.03" | 0.1" |
| 1987 | 85° | 47° | 66° | — | — |
| 1986 | 79° | 39° | 59° | — | — |
| 1985 | 68° | 50° | 59° | — | — |
| 1984 | 86° | 45° | 65° | — | — |
| 1983 | 70° | 41° | 55° | — | — |
| 1982 | 76° | 40° | 58° | 0.08" | — |
| 1981 | 70° | 41° | 55° | — | — |
| 1980 | 72° | 43° | 57° | 0.15" | — |
| 1979coldest | 44° | 29° | 36° | — | — |
| 1978 | 79° | 39° | 59° | — | — |
| 1977 | 80° | 38° | 59° | 0.33" | — |
| 1976 | 76° | 44° | 60° | — | — |
| 1975 | 78° | 47° | 62° | — | — |
| 1974 | 80° | 35° | 58° | — | — |
| 1973 | 69° | 37° | 53° | — | — |
| 1972 | 62° | 41° | 52° | 0.08" | — |
| 1971 | 57° | 42° | 50° | 0.15" | — |
54 years of data from LONGMONT 2 ESE