Weather on May 17
Longmont, CO
55 Years of Data
Avg High
74°F
Avg Low
44°F
Warmest
1996
76°F avg
Coldest
2016
40°F avg
About This Date
May 17th in Longmont, CO typically brings pleasant spring weather, with average highs around 74°F and lows near 44°F — a 30°F daily swing. Over 54 years of records, the warmest May 17th was in 1996 (76°F average), while the coldest was 2016 (40°F) — a 36°F range across recorded history. Precipitation has occurred on 37% of recorded May 17th dates, with snow falling 2% of the time. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for May 17th in Longmont, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 71° | 47° | 59° | — | — |
| 2024 | 78° | 45° | 61° | — | — |
| 2023 | 82° | 45° | 63° | 0.38" | — |
| 2022 | 85° | 45° | 65° | — | — |
| 2021 | 62° | 52° | 57° | 0.03" | — |
| 2020 | 74° | 44° | 59° | — | — |
| 2019 | 86° | 50° | 68° | — | — |
| 2018 | 79° | 52° | 65° | — | — |
| 2017 | 73° | 38° | 55° | 0.03" | — |
| 2016coldest | 45° | 36° | 40° | 0.36" | — |
| 2015 | 69° | 42° | 56° | 0.2" | — |
| 2014 | 66° | 41° | 54° | 0.33" | — |
| 2013 | 86° | 48° | 67° | — | — |
| 2012 | 80° | 46° | 63° | 0.05" | — |
| 2011 | 59° | 39° | 49° | 0.1" | — |
| 2010 | 74° | 40° | 57° | — | — |
| 2008 | 76° | 48° | 62° | — | — |
| 2007 | 72° | 45° | 58° | — | — |
| 2006 | 82° | 46° | 64° | — | — |
| 2005 | 75° | 54° | 64° | — | — |
| 2004 | 81° | 48° | 64° | — | — |
| 2003 | 79° | 52° | 65° | — | — |
| 2002 | 54° | 39° | 46° | 1.14" | — |
| 2001 | 85° | 48° | 66° | — | — |
| 2000 | 87° | 44° | 66° | — | — |
| 1999 | 60° | 29° | 44° | 0.76" | — |
| 1998 | 81° | 38° | 59° | — | — |
| 1997 | 85° | 43° | 64° | — | — |
| 1996warmest | 96° | 56° | 76° | — | — |
| 1995 | 68° | 44° | 56° | 1.63" | — |
| 1994 | 90° | 47° | 68° | — | — |
| 1993 | 69° | 47° | 58° | 0.08" | — |
| 1992 | 85° | 40° | 62° | — | — |
| 1991 | 62° | 44° | 53° | 0.66" | — |
| 1990 | 61° | 37° | 49° | — | — |
| 1989 | 65° | 39° | 52° | — | — |
| 1988 | 93° | 48° | 71° | — | — |
| 1987 | 85° | 52° | 68° | 0.13" | — |
| 1986 | 59° | 38° | 48° | 0.05" | — |
| 1985 | 67° | 48° | 57° | 0.03" | — |
| 1984 | 82° | 43° | 62° | — | — |
| 1983 | 57° | 32° | 45° | 3.45" | 1" |
| 1982 | 64° | 43° | 53° | 0.03" | — |
| 1981 | 52° | 44° | 48° | 1.52" | — |
| 1980 | 55° | 40° | 47° | 0.3" | — |
| 1979 | 84° | 46° | 65° | — | — |
| 1978 | 88° | 57° | 72° | — | — |
| 1977 | 78° | 44° | 61° | — | — |
| 1976 | 60° | 33° | 47° | — | — |
| 1975 | 87° | 49° | 68° | — | — |
| 1974 | 73° | 48° | 61° | — | — |
| 1973 | 78° | 45° | 61° | — | — |
| 1972 | 88° | 42° | 65° | — | — |
| 1971 | 86° | 41° | 64° | — | — |
54 years of data from LONGMONT 2 ESE