Weather on August 12
Boulder, CO
55 Years of Data
Avg High
86°F
Avg Low
56°F
Warmest
2022
78°F avg
Coldest
1992
61°F avg
About This Date
August 12th in Boulder, CO typically brings warm summer weather, with average highs around 86°F and lows near 56°F — a 30°F daily swing. Over 55 years of records, the warmest August 12th was in 2022 (78°F average), while the coldest was 1992 (61°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 25% of August 12th dates historically, with the wettest August 12th recording 1.35" of rain. The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.1°F warmer on this date compared to 20-30 years ago.
Planning for August 12th in Boulder, CO? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 59° | 74° | — | — |
| 2024 | 88° | 61° | 74° | — | — |
| 2023 | 82° | 63° | 72° | — | — |
| 2022warmest | 91° | 64° | 78° | — | — |
| 2021 | 86° | 63° | 74° | — | — |
| 2020 | 95° | 57° | 76° | — | — |
| 2019 | 91° | 59° | 75° | — | — |
| 2018 | 90° | 55° | 72° | — | — |
| 2017 | 80° | 52° | 66° | — | — |
| 2016 | 82° | 52° | 67° | — | — |
| 2015 | 91° | 56° | 73° | — | — |
| 2014 | 89° | 52° | 70° | — | — |
| 2013 | 81° | 52° | 66° | — | — |
| 2012 | 85° | 53° | 69° | 0.48" | — |
| 2011 | 92° | 60° | 76° | — | — |
| 2010 | 90° | 55° | 72° | — | — |
| 2009 | 96° | 56° | 76° | — | — |
| 2008 | 90° | 51° | 70° | — | — |
| 2007 | 94° | 60° | 77° | — | — |
| 2006 | 86° | 63° | 74° | 0.03" | — |
| 2005 | 76° | 56° | 66° | — | — |
| 2004 | 76° | 47° | 61° | — | — |
| 2003 | 91° | 56° | 73° | — | — |
| 2002 | 92° | 56° | 74° | — | — |
| 2001 | 85° | 56° | 70° | — | — |
| 2000 | 84° | 65° | 74° | — | — |
| 1999 | 84° | 56° | 70° | — | — |
| 1998 | 85° | 57° | 71° | — | — |
| 1997 | 74° | 49° | 61° | 0.3" | — |
| 1996 | 99° | 55° | 77° | — | — |
| 1995 | 92° | 58° | 75° | 0.03" | — |
| 1994 | 84° | 57° | 71° | 0.05" | — |
| 1993 | 89° | 53° | 71° | — | — |
| 1992coldest | 71° | 52° | 61° | 0.74" | — |
| 1991 | 77° | 56° | 66° | — | — |
| 1990 | 70° | 54° | 62° | 1.35" | — |
| 1989 | 87° | 54° | 70° | 0.08" | — |
| 1988 | 86° | 58° | 72° | — | — |
| 1987 | 80° | 57° | 69° | — | — |
| 1986 | 85° | 57° | 71° | 0.23" | — |
| 1985 | 82° | 57° | 70° | — | — |
| 1984 | 87° | 51° | 69° | — | — |
| 1983 | 87° | 60° | 74° | 0.03" | — |
| 1982 | 89° | 58° | 73° | 0.53" | — |
| 1981 | 70° | 56° | 63° | 0.1" | — |
| 1980 | 95° | 58° | 76° | — | — |
| 1979 | 92° | 51° | 71° | — | — |
| 1978 | 90° | 53° | 71° | — | — |
| 1977 | 85° | 49° | 67° | — | — |
| 1976 | 87° | 53° | 70° | — | — |
| 1975 | 88° | 66° | 77° | — | — |
| 1974 | 84° | 56° | 70° | 0.03" | — |
| 1973 | 81° | 54° | 67° | 0.05" | — |
| 1972 | 95° | 58° | 76° | — | — |
| 1971 | 88° | 67° | 77° | — | — |
55 years of data from BOULDER MUNI AP