Weather on May 1
Boulder, CO
55 Years of Data
Avg High
64°F
Avg Low
38°F
Warmest
2001
70°F avg
Coldest
2005
35°F avg
About This Date
May 1st in Boulder, CO typically brings mild spring weather, with average highs around 64°F and lows near 38°F — a 26°F daily swing. Over 55 years of records, the warmest May 1st was in 2001 (70°F average), while the coldest was 2005 (35°F) — a 35°F range across recorded history. Precipitation has occurred on 33% of recorded May 1st dates, with snow falling 11% of the time (heaviest snowfall: 10.7"). The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.0°F warmer on this date compared to 20-30 years ago.
Planning for May 1st in Boulder, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 59° | 41° | 50° | — | — |
| 2024 | 63° | 41° | 52° | — | — |
| 2023 | 72° | 39° | 55° | — | — |
| 2022 | 61° | 36° | 48° | — | — |
| 2021 | 84° | 55° | 70° | — | — |
| 2020 | 82° | 55° | 69° | — | — |
| 2019 | 45° | 34° | 39° | — | — |
| 2018 | 61° | 45° | 53° | — | — |
| 2017 | 64° | 36° | 50° | — | — |
| 2016 | 42° | 31° | 36° | 0.25" | 1" |
| 2015 | 70° | 44° | 57° | 0.36" | — |
| 2014 | 63° | 30° | 46° | — | — |
| 2013 | 53° | 27° | 40° | 3.35" | 10.7" |
| 2012 | 78° | 53° | 66° | — | — |
| 2011 | 50° | 31° | 40° | — | — |
| 2010 | 58° | 30° | 44° | — | — |
| 2009 | 43° | 34° | 38° | — | — |
| 2008 | 75° | 32° | 54° | 0.71" | 0.7" |
| 2007 | 72° | 47° | 59° | 0.36" | — |
| 2006 | 74° | 39° | 56° | 0.3" | — |
| 2005coldest | 39° | 30° | 35° | 0.15" | 0.2" |
| 2004 | 59° | 29° | 44° | — | — |
| 2003 | 55° | 37° | 46° | — | — |
| 2002 | 72° | 36° | 54° | 0.05" | — |
| 2001warmest | 84° | 55° | 70° | — | — |
| 2000 | 68° | 33° | 51° | — | — |
| 1999 | 51° | 34° | 42° | 1.27" | — |
| 1998 | 67° | 36° | 51° | 0.08" | — |
| 1997 | 58° | 37° | 47° | — | — |
| 1996 | 68° | 36° | 52° | 0.13" | — |
| 1995 | 54° | 32° | 43° | 0.03" | — |
| 1994 | 67° | 31° | 49° | — | — |
| 1993 | 55° | 33° | 44° | — | — |
| 1992 | 83° | 55° | 69° | — | — |
| 1991 | 62° | 31° | 46° | — | — |
| 1990 | 43° | 30° | 36° | 0.03" | 0.1" |
| 1989 | 66° | 24° | 45° | — | — |
| 1988 | 79° | 48° | 63° | — | — |
| 1987 | 74° | 46° | 60° | — | — |
| 1986 | 71° | 39° | 55° | — | — |
| 1985 | 73° | 38° | 55° | 0.13" | — |
| 1984 | 63° | 39° | 51° | — | — |
| 1983 | 63° | 38° | 50° | 0.08" | — |
| 1982 | 78° | 39° | 59° | — | — |
| 1981 | 81° | 42° | 61° | — | — |
| 1980 | 51° | 39° | 45° | 1.5" | — |
| 1979 | 64° | 39° | 52° | — | — |
| 1978 | 43° | 34° | 38° | 3.91" | — |
| 1977 | 74° | 48° | 61° | — | — |
| 1976 | 65° | 31° | 48° | — | — |
| 1975 | 62° | 30° | 46° | — | — |
| 1974 | 74° | 37° | 55° | — | — |
| 1973 | 41° | 30° | 36° | 2.54" | 6.2" |
| 1972 | 59° | 33° | 46° | — | — |
| 1971 | 73° | 40° | 56° | — | — |
55 years of data from BOULDER MUNI AP