Weather on June 1
Boulder, CO
55 Years of Data
Avg High
75°F
Avg Low
48°F
Warmest
2020
73°F avg
Coldest
1978
46°F avg
About This Date
June 1st in Boulder, CO typically brings pleasant summer weather, with average highs around 75°F and lows near 48°F — a 27°F daily swing. Over 55 years of records, the warmest June 1st was in 2020 (73°F average), while the coldest was 1978 (46°F) — a 27°F range across recorded history. Rain or other precipitation has occurred on about 33% of June 1st dates historically, with the wettest June 1st recording 5.92" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
Planning for June 1st in Boulder, CO? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 81° | 55° | 68° | — | — |
| 2024 | 81° | 48° | 64° | — | — |
| 2023 | 72° | 52° | 62° | — | — |
| 2022 | 54° | 41° | 47° | — | — |
| 2021 | 68° | 45° | 56° | — | — |
| 2020warmest | 90° | 57° | 73° | — | — |
| 2019 | 73° | 52° | 62° | — | — |
| 2018 | 88° | 55° | 71° | — | — |
| 2017 | 79° | 47° | 63° | 0.03" | — |
| 2016 | 72° | 48° | 60° | 2.69" | — |
| 2015 | 81° | 52° | 66° | 0.03" | — |
| 2014 | 82° | 53° | 68° | — | — |
| 2013 | 72° | 42° | 57° | — | — |
| 2012 | 81° | 47° | 64° | — | — |
| 2011 | 77° | 47° | 62° | — | — |
| 2010 | 77° | 49° | 63° | — | — |
| 2009 | 73° | 54° | 63° | 0.03" | — |
| 2008 | 80° | 47° | 63° | — | — |
| 2007 | 65° | 44° | 54° | — | — |
| 2006 | 82° | 45° | 63° | 0.05" | — |
| 2005 | 80° | 45° | 62° | — | — |
| 2004 | 75° | 39° | 57° | — | — |
| 2003 | 77° | 65° | 71° | 0.03" | — |
| 2002 | 85° | 55° | 70° | — | — |
| 2001 | 80° | 48° | 64° | — | — |
| 2000 | 78° | 44° | 61° | — | — |
| 1999 | 76° | 41° | 58° | 0.03" | — |
| 1998 | 87° | 49° | 68° | — | — |
| 1997 | 89° | 53° | 71° | — | — |
| 1996 | 74° | 43° | 58° | — | — |
| 1995 | 74° | 46° | 60° | 0.03" | — |
| 1994 | 81° | 52° | 66° | 0.41" | — |
| 1993 | 83° | 49° | 66° | — | — |
| 1992 | 60° | 41° | 51° | 1.24" | — |
| 1991 | 62° | 50° | 56° | 5.92" | — |
| 1990 | 76° | 46° | 61° | — | — |
| 1989 | 69° | 45° | 57° | 0.97" | — |
| 1988 | 75° | 40° | 57° | — | — |
| 1987 | 80° | 50° | 65° | — | — |
| 1986 | 77° | 51° | 64° | 1.12" | — |
| 1985 | 76° | 53° | 64° | — | — |
| 1984 | 69° | 53° | 61° | 0.81" | — |
| 1983 | 63° | 43° | 53° | 0.28" | — |
| 1982 | 64° | 45° | 54° | 0.05" | — |
| 1981 | 79° | 47° | 63° | — | — |
| 1980 | 78° | 45° | 61° | — | — |
| 1979 | 60° | 38° | 49° | — | — |
| 1978coldest | 52° | 41° | 46° | 1.02" | — |
| 1977 | 86° | 51° | 69° | — | — |
| 1976 | 82° | 47° | 64° | — | — |
| 1975 | 63° | 40° | 51° | 0.08" | — |
| 1974 | 69° | 41° | 55° | — | — |
| 1973 | 78° | 47° | 62° | — | — |
| 1972 | 87° | 50° | 69° | — | — |
| 1971 | 71° | 45° | 58° | — | — |
55 years of data from BOULDER MUNI AP