Weather on May 31
Longmont, CO
55 Years of Data
Avg High
76°F
Avg Low
46°F
Warmest
1994
74°F avg
Coldest
1979
43°F avg
About This Date
May 31st in Longmont, CO typically brings pleasant spring weather, with average highs around 76°F and lows near 46°F — a 30°F daily swing. Over 54 years of records, the warmest May 31st was in 1994 (74°F average), while the coldest was 1979 (43°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 39% of May 31st dates historically, with the wettest May 31st recording 2.24" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 31st in Longmont, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
0.9°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 52° | 67° | 0.05" | — |
| 2024 | 83° | 52° | 67° | 0.38" | — |
| 2023 | 80° | 50° | 65° | — | — |
| 2022 | 69° | 38° | 53° | — | — |
| 2021 | 54° | 49° | 51° | 2.24" | — |
| 2020 | 86° | 56° | 71° | 0.05" | — |
| 2019 | 81° | 38° | 59° | 0.03" | — |
| 2018 | 84° | 51° | 68° | — | — |
| 2017 | 80° | 44° | 62° | 0.03" | — |
| 2016 | 70° | 49° | 59° | — | — |
| 2015 | 86° | 50° | 68° | — | — |
| 2014 | 76° | 48° | 62° | 0.18" | — |
| 2013 | 73° | 49° | 61° | — | — |
| 2012 | 73° | 43° | 58° | — | — |
| 2011 | 77° | 44° | 61° | — | — |
| 2010 | 79° | 43° | 61° | — | — |
| 2008 | 79° | 49° | 64° | — | — |
| 2007 | 77° | 42° | 60° | — | — |
| 2006 | 77° | 45° | 61° | 0.08" | — |
| 2005 | 69° | 45° | 57° | 0.13" | — |
| 2004 | 67° | 40° | 53° | — | — |
| 2003 | 92° | 52° | 72° | — | — |
| 2002 | 93° | 49° | 71° | — | — |
| 2001 | 70° | 39° | 54° | 0.05" | — |
| 2000 | 79° | 51° | 65° | — | — |
| 1999 | 85° | 47° | 66° | — | — |
| 1998 | 91° | 46° | 69° | — | — |
| 1997 | 69° | 45° | 57° | — | — |
| 1996 | 71° | 42° | 57° | — | — |
| 1995 | 50° | 41° | 46° | 0.38" | — |
| 1994warmest | 96° | 52° | 74° | — | — |
| 1993 | 79° | 43° | 61° | — | — |
| 1992 | 71° | 42° | 57° | 1.19" | — |
| 1991 | 78° | 50° | 64° | — | — |
| 1990 | 67° | 44° | 55° | 0.66" | — |
| 1989 | 64° | 43° | 53° | 0.79" | — |
| 1988 | 90° | 47° | 68° | — | — |
| 1987 | 74° | 64° | 69° | — | — |
| 1986 | 76° | 50° | 63° | 0.13" | — |
| 1985 | 72° | 43° | 57° | — | — |
| 1984 | 91° | 53° | 72° | — | — |
| 1983 | — | 36° | — | 1.57" | — |
| 1982 | 55° | 43° | 49° | 0.76" | — |
| 1981 | 74° | 50° | 62° | — | — |
| 1980 | 78° | 44° | 61° | — | — |
| 1979coldest | 46° | 39° | 43° | 1.14" | — |
| 1978 | 76° | 43° | 59° | 0.18" | — |
| 1977 | 78° | 49° | 63° | — | — |
| 1976 | 88° | 43° | 65° | — | — |
| 1975 | 67° | 43° | 55° | 0.94" | — |
| 1974 | 80° | 45° | 62° | — | — |
| 1973 | 63° | 39° | 51° | 0.33" | — |
| 1972 | 75° | 44° | 60° | — | — |
| 1971 | 71° | 39° | 55° | — | — |
54 years of data from LONGMONT 2 ESE