Weather on May 4
Boulder, CO
55 Years of Data
Avg High
68°F
Avg Low
41°F
Warmest
2012
71°F avg
Coldest
1979
36°F avg
About This Date
May 4th 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 4th was in 2012 (71°F average), while the coldest was 1979 (36°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 25% of May 4th dates historically, with the wettest May 4th recording 1.17" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
Planning for May 4th in Boulder, CO? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 45° | 60° | — | — |
| 2024 | 63° | 37° | 50° | — | — |
| 2023 | 72° | 50° | 61° | — | — |
| 2022 | 52° | 39° | 45° | — | — |
| 2021 | 59° | 36° | 47° | — | — |
| 2020 | 70° | 43° | 56° | — | — |
| 2019 | 70° | 39° | 54° | — | — |
| 2018 | 70° | 43° | 56° | — | — |
| 2017 | 72° | 32° | 52° | — | — |
| 2016 | 74° | 40° | 57° | — | — |
| 2015 | 61° | 47° | 54° | 0.91" | — |
| 2014 | 85° | 56° | 70° | — | — |
| 2013 | 59° | 33° | 46° | — | — |
| 2012warmest | 88° | 55° | 71° | — | — |
| 2011 | 65° | 39° | 52° | — | — |
| 2010 | 70° | 50° | 60° | — | — |
| 2009 | 62° | 40° | 51° | — | — |
| 2008 | 65° | 38° | 51° | — | — |
| 2007 | 71° | 40° | 55° | 0.18" | — |
| 2006 | 51° | 39° | 45° | 0.51" | — |
| 2005 | 70° | 36° | 53° | — | — |
| 2004 | 77° | 48° | 63° | — | — |
| 2003 | 69° | 49° | 59° | — | — |
| 2002 | 69° | 39° | 54° | 0.03" | — |
| 2001 | 39° | 33° | 36° | 1.17" | — |
| 2000 | 88° | 47° | 67° | — | — |
| 1999 | 63° | 37° | 50° | — | — |
| 1998 | 75° | 45° | 60° | — | — |
| 1997 | 78° | 39° | 59° | — | — |
| 1996 | 73° | 41° | 57° | — | — |
| 1995 | 62° | 33° | 48° | 0.15" | — |
| 1994 | 72° | 32° | 52° | 0.08" | — |
| 1993 | 78° | 41° | 60° | — | — |
| 1992 | 74° | 42° | 58° | — | — |
| 1991 | 57° | 36° | 46° | 0.69" | — |
| 1990 | 59° | 34° | 46° | 0.1" | — |
| 1989 | 66° | 36° | 51° | 0.18" | — |
| 1988 | 68° | 34° | 51° | — | — |
| 1987 | 55° | 41° | 48° | 0.23" | — |
| 1986 | 85° | 45° | 65° | — | — |
| 1985 | 83° | 42° | 62° | — | — |
| 1984 | 67° | 36° | 51° | — | — |
| 1983 | 66° | 36° | 51° | 0.05" | — |
| 1982 | 76° | 53° | 64° | — | — |
| 1981 | 61° | 41° | 51° | 0.66" | — |
| 1980 | 67° | 39° | 53° | — | — |
| 1979coldest | 41° | 30° | 36° | — | — |
| 1978 | 60° | 29° | 44° | 0.13" | — |
| 1977 | 72° | 51° | 61° | — | — |
| 1976 | 73° | 45° | 59° | — | — |
| 1975 | 76° | 42° | 59° | — | — |
| 1974 | 61° | 42° | 51° | — | — |
| 1973 | 71° | 38° | 54° | — | — |
| 1972 | 72° | 38° | 55° | — | — |
| 1971 | 76° | 46° | 61° | — | — |
55 years of data from BOULDER MUNI AP