Weather on June 20
Boulder, CO
55 Years of Data
Avg High
84°F
Avg Low
53°F
Warmest
1989
80°F avg
Coldest
2011
57°F avg
About This Date
June 20th in Boulder, CO typically brings warm summer weather, with average highs around 84°F and lows near 53°F — a 31°F daily swing. Over 55 years of records, the warmest June 20th was in 1989 (80°F average), while the coldest was 2011 (57°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 29% of June 20th dates historically, with the wettest June 20th recording 2.82" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for June 20th in Boulder, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 100° | 59° | 80° | — | — |
| 2024 | 90° | 55° | 72° | — | — |
| 2023 | 86° | 59° | 73° | — | — |
| 2022 | 88° | 61° | 74° | — | — |
| 2021 | 79° | 52° | 65° | 0.25" | — |
| 2020 | 86° | 46° | 66° | — | — |
| 2019 | 86° | 55° | 71° | — | — |
| 2018 | 77° | 52° | 64° | — | — |
| 2017 | 97° | 53° | 75° | — | — |
| 2016 | 90° | 57° | 73° | — | — |
| 2015 | 90° | 59° | 74° | — | — |
| 2014 | 87° | 49° | 68° | — | — |
| 2013 | 89° | 55° | 72° | — | — |
| 2012 | 89° | 55° | 72° | — | — |
| 2011coldest | 68° | 47° | 57° | 2.82" | — |
| 2010 | 79° | 54° | 66° | — | — |
| 2009 | 76° | 55° | 65° | 0.25" | — |
| 2008 | 81° | 50° | 65° | — | — |
| 2007 | 95° | 53° | 74° | — | — |
| 2006 | 90° | 54° | 72° | — | — |
| 2005 | 87° | 63° | 75° | — | — |
| 2004 | 72° | 49° | 60° | 0.18" | — |
| 2003 | 75° | 50° | 63° | 0.18" | — |
| 2002 | 83° | 54° | 68° | 0.48" | — |
| 2001 | 76° | 48° | 62° | — | — |
| 2000 | 82° | 52° | 67° | 0.2" | — |
| 1999 | 87° | 52° | 69° | — | — |
| 1998 | 85° | 54° | 69° | 0.05" | — |
| 1997 | 89° | 60° | 75° | — | — |
| 1996 | 88° | 53° | 70° | 0.03" | — |
| 1995 | 83° | 51° | 67° | — | — |
| 1994 | 84° | 59° | 72° | 0.33" | — |
| 1993 | 82° | 49° | 65° | — | — |
| 1992 | 77° | 49° | 63° | 0.08" | — |
| 1991 | 88° | 54° | 71° | — | — |
| 1990 | 82° | 48° | 65° | 0.61" | — |
| 1989warmest | 94° | 66° | 80° | — | — |
| 1988 | 93° | 63° | 78° | — | — |
| 1987 | 88° | 52° | 70° | — | — |
| 1986 | 85° | 54° | 69° | 0.15" | — |
| 1985 | 90° | 57° | 73° | — | — |
| 1984 | 84° | 52° | 68° | 0.03" | — |
| 1983 | 86° | 58° | 72° | — | — |
| 1982 | 81° | 47° | 64° | — | — |
| 1981 | 92° | 55° | 73° | — | — |
| 1980 | 84° | 51° | 68° | — | — |
| 1979 | 70° | 46° | 58° | — | — |
| 1978 | 85° | 52° | 68° | — | — |
| 1977 | 76° | 58° | 67° | — | — |
| 1976 | 89° | 50° | 70° | — | — |
| 1975 | 81° | 47° | 64° | — | — |
| 1974 | 93° | 59° | 76° | 0.25" | — |
| 1973 | 74° | 43° | 58° | — | — |
| 1972 | 72° | 48° | 60° | 0.05" | — |
| 1971 | 86° | 57° | 72° | — | — |
55 years of data from BOULDER MUNI AP