Weather on August 11
Boulder, CO
55 Years of Data
Avg High
86°F
Avg Low
57°F
Warmest
1995
82°F avg
Coldest
1977
57°F avg
About This Date
August 11th in Boulder, CO typically brings warm summer weather, with average highs around 86°F and lows near 57°F — a 29°F daily swing. Over 55 years of records, the warmest August 11th was in 1995 (82°F average), while the coldest was 1977 (57°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of August 11th dates historically, with the wettest August 11th recording 4.85" of rain. The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.7°F warmer on this date compared to 20-30 years ago.
Planning for August 11th in Boulder, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 54° | 70° | — | — |
| 2024 | 88° | 59° | 73° | — | — |
| 2023 | 90° | 68° | 79° | — | — |
| 2022 | 95° | 63° | 79° | — | — |
| 2021 | 93° | 63° | 78° | — | — |
| 2020 | 95° | 59° | 77° | — | — |
| 2019 | 81° | 63° | 72° | — | — |
| 2018 | 91° | 59° | 75° | — | — |
| 2017 | 77° | 51° | 64° | 0.03" | — |
| 2016 | 88° | 60° | 74° | — | — |
| 2015 | 83° | 61° | 72° | — | — |
| 2014 | 85° | 52° | 68° | — | — |
| 2013 | 83° | 55° | 69° | — | — |
| 2012 | 90° | 67° | 78° | — | — |
| 2011 | 93° | 52° | 72° | — | — |
| 2010 | 92° | 56° | 74° | — | — |
| 2009 | 89° | 52° | 70° | — | — |
| 2008 | 86° | 52° | 69° | 0.1" | — |
| 2007 | 93° | 61° | 77° | — | — |
| 2006 | 94° | 62° | 78° | — | — |
| 2005 | 80° | 57° | 69° | 0.18" | — |
| 2004 | 73° | 56° | 64° | 0.03" | — |
| 2003 | 89° | 60° | 75° | — | — |
| 2002 | 95° | 57° | 76° | — | — |
| 2001 | 84° | 53° | 69° | 0.13" | — |
| 2000 | 95° | 60° | 78° | — | — |
| 1999 | 85° | 55° | 70° | — | — |
| 1998 | 84° | 59° | 72° | 0.03" | — |
| 1997 | 69° | 51° | 60° | 0.18" | — |
| 1996 | 91° | 51° | 71° | — | — |
| 1995warmest | 94° | 70° | 82° | — | — |
| 1994 | 83° | 60° | 71° | 4.85" | — |
| 1993 | 85° | 51° | 68° | — | — |
| 1992 | 78° | 54° | 66° | — | — |
| 1991 | 83° | 55° | 69° | — | — |
| 1990 | 84° | 57° | 71° | 0.36" | — |
| 1989 | 91° | 57° | 74° | — | — |
| 1988 | 92° | 57° | 74° | — | — |
| 1987 | 90° | 64° | 77° | — | — |
| 1986 | 90° | 56° | 73° | — | — |
| 1985 | 85° | 59° | 72° | — | — |
| 1984 | 89° | 55° | 72° | — | — |
| 1983 | 91° | 57° | 74° | — | — |
| 1982 | 80° | 56° | 68° | — | — |
| 1981 | 72° | 51° | 61° | — | — |
| 1980 | 86° | 62° | 74° | — | — |
| 1979 | 83° | 48° | 65° | — | — |
| 1978 | 90° | 52° | 71° | 0.28" | — |
| 1977coldest | 66° | 49° | 57° | 0.18" | — |
| 1976 | 82° | 57° | 70° | — | — |
| 1975 | 91° | 61° | 76° | — | — |
| 1974 | 83° | 47° | 65° | — | — |
| 1973 | 86° | 60° | 73° | 0.25" | — |
| 1972 | 93° | 61° | 77° | — | — |
| 1971 | 90° | 57° | 73° | — | — |
55 years of data from BOULDER MUNI AP