Weather on May 11
Boulder, CO
55 Years of Data
Avg High
68°F
Avg Low
41°F
Warmest
2004
69°F avg
Coldest
1979
36°F avg
About This Date
May 11th in Boulder, CO typically brings mild spring weather, with average highs around 68°F and lows near 41°F — a 27°F daily swing. Over 55 years of records, the warmest May 11th was in 2004 (69°F average), while the coldest was 1979 (36°F) — a 33°F range across recorded history. Precipitation has occurred on 31% of recorded May 11th dates, with snow falling 4% of the time (heaviest snowfall: 1.7"). The last decade has been 3.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.7°F cooler on this date compared to 20-30 years ago.
Planning for May 11th in Boulder, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 82° | 48° | 65° | — | — |
| 2024 | 64° | 37° | 51° | — | — |
| 2023 | 52° | 46° | 49° | — | — |
| 2022 | 86° | 43° | 64° | — | — |
| 2021 | 45° | 34° | 39° | 0.13" | — |
| 2020 | 54° | 36° | 45° | — | — |
| 2019 | 63° | 34° | 48° | — | — |
| 2018 | 70° | 52° | 61° | — | — |
| 2017 | 64° | 45° | 54° | 1.32" | — |
| 2016 | 61° | 38° | 49° | — | — |
| 2015 | 58° | 30° | 44° | — | — |
| 2014 | 51° | 31° | 41° | 3.96" | 1.7" |
| 2013 | 67° | 42° | 54° | 0.05" | — |
| 2012 | 76° | 38° | 57° | 0.25" | — |
| 2011 | 68° | 33° | 51° | 3.07" | 0.2" |
| 2010 | 59° | 39° | 49° | 0.33" | — |
| 2009 | 66° | 48° | 57° | — | — |
| 2008 | 74° | 30° | 52° | — | — |
| 2007 | 81° | 45° | 63° | — | — |
| 2006 | 68° | 29° | 48° | — | — |
| 2005 | 65° | 44° | 54° | 3.12" | — |
| 2004warmest | 84° | 53° | 69° | — | — |
| 2003 | 58° | 31° | 44° | — | — |
| 2002 | 58° | 42° | 50° | 0.23" | — |
| 2001 | 76° | 49° | 62° | — | — |
| 2000 | 75° | 44° | 60° | — | — |
| 1999 | 59° | 30° | 45° | — | — |
| 1998 | 68° | 43° | 55° | — | — |
| 1997 | 74° | 48° | 61° | — | — |
| 1996 | 77° | 46° | 62° | — | — |
| 1995 | 68° | 39° | 54° | 0.08" | — |
| 1994 | 82° | 46° | 64° | 0.08" | — |
| 1993 | 66° | 36° | 51° | — | — |
| 1992 | 78° | 43° | 60° | — | — |
| 1991 | 84° | 50° | 67° | — | — |
| 1990 | 62° | 38° | 50° | 0.43" | — |
| 1989 | 80° | 47° | 63° | — | — |
| 1988 | 76° | 41° | 58° | — | — |
| 1987 | 75° | 48° | 62° | — | — |
| 1986 | 79° | 42° | 60° | — | — |
| 1985 | 72° | 48° | 60° | — | — |
| 1984 | 81° | 46° | 63° | — | — |
| 1983 | 41° | 38° | 39° | 0.05" | — |
| 1982 | 65° | 40° | 52° | 0.18" | — |
| 1981 | 64° | 36° | 50° | — | — |
| 1980 | 66° | 42° | 54° | 0.64" | — |
| 1979coldest | 44° | 29° | 36° | — | — |
| 1978 | 74° | 41° | 57° | — | — |
| 1977 | 77° | 38° | 57° | — | — |
| 1976 | 73° | 47° | 60° | — | — |
| 1975 | 73° | 48° | 61° | — | — |
| 1974 | 76° | 36° | 56° | — | — |
| 1973 | 65° | 37° | 51° | — | — |
| 1972 | 56° | 41° | 48° | 0.1" | — |
| 1971 | 47° | 40° | 43° | 0.94" | — |
55 years of data from BOULDER MUNI AP