Weather on May 9
Longmont, CO
55 Years of Data
About This Date
May 9th 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 55 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 29% of recorded May 9th dates, with snow falling 4% of the time (heaviest snowfall: 3"). The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.
Planning for May 9th in Longmont, CO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 73° | 47° | 60° | — | — |
| 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" | — |
Longmont, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Longmont, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Longmont, CO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Longmont, CO
Longmont, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.