Weather on May 9
Longmont, CO
55 Years of Data
Avg High
69°F
Avg Low
40°F
Warmest
2011
69°F avg
Coldest
1979
36°F avg
About This Date
May 9th in Longmont, CO typically brings mild spring weather, with average highs around 69°F and lows near 40°F — a 29°F daily swing. Over 54 years of records, the warmest May 9th was in 2011 (69°F average), while the coldest was 1979 (36°F) — a 33°F range across recorded history. Precipitation has occurred on 30% of recorded May 9th dates, with snow falling 4% of the time (heaviest snowfall: 3"). The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for May 9th in Longmont, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 72° | 43° | 57° | — | — |
| 2024 | 63° | 41° | 52° | — | — |
| 2023 | 76° | 47° | 61° | — | — |
| 2022 | 73° | 45° | 59° | — | — |
| 2021 | 88° | 41° | 64° | 0.36" | — |
| 2020 | 66° | 39° | 53° | — | — |
| 2019 | 46° | 33° | 40° | 0.53" | 0.2" |
| 2018 | 80° | 47° | 63° | — | — |
| 2017 | 62° | 46° | 54° | 1.65" | — |
| 2016 | 67° | 37° | 52° | 0.15" | — |
| 2015 | 49° | 39° | 44° | 4.17" | — |
| 2014 | 65° | 34° | 49° | 0.25" | — |
| 2013 | 60° | 41° | 51° | 1.19" | — |
| 2012 | 76° | 39° | 57° | — | — |
| 2011warmest | 83° | 55° | 69° | — | — |
| 2010 | 70° | 33° | 51° | — | — |
| 2008 | 74° | 37° | 55° | — | — |
| 2007 | 73° | 40° | 56° | 0.03" | — |
| 2006 | 63° | 43° | 53° | — | — |
| 2005 | 73° | 38° | 55° | — | — |
| 2004 | 85° | 45° | 65° | — | — |
| 2003 | 60° | 37° | 49° | 0.36" | — |
| 2002 | 68° | 24° | 46° | — | — |
| 2001 | 76° | 37° | 56° | — | — |
| 2000 | 47° | 34° | 40° | 0.71" | — |
| 1999 | 82° | 49° | 65° | — | — |
| 1998 | 61° | 31° | 46° | 0.43" | — |
| 1997 | 64° | 35° | 50° | — | — |
| 1996 | 80° | 47° | 63° | — | — |
| 1995 | 57° | 41° | 49° | 0.1" | — |
| 1994 | 74° | 43° | 58° | — | — |
| 1993 | 71° | 33° | 52° | 0.05" | — |
| 1992 | 82° | 46° | 64° | — | — |
| 1991 | 81° | 49° | 65° | — | — |
| 1990 | 57° | 31° | 44° | — | — |
| 1989 | 82° | 46° | 64° | 0.41" | — |
| 1988 | 68° | 36° | 52° | — | — |
| 1987 | 81° | 46° | 63° | — | — |
| 1986 | 61° | 37° | 49° | — | — |
| 1985 | 84° | 50° | 67° | — | — |
| 1984 | 68° | 36° | 52° | — | — |
| 1983 | 75° | 40° | 57° | — | — |
| 1982 | 77° | 40° | 58° | — | — |
| 1981 | 62° | 39° | 51° | — | — |
| 1980 | 57° | 40° | 48° | — | — |
| 1979coldest | 43° | 30° | 36° | 3.3" | 3" |
| 1978 | 51° | 27° | 39° | — | — |
| 1977 | 84° | 48° | 66° | — | — |
| 1976 | 70° | 41° | 55° | — | — |
| 1975 | 67° | 34° | 50° | — | — |
| 1974 | 86° | 47° | 66° | — | — |
| 1973 | 74° | 43° | 58° | — | — |
| 1972 | 69° | 43° | 56° | — | — |
| 1971 | 68° | 39° | 54° | 0.41" | — |
54 years of data from LONGMONT 2 ESE