Weather on August 23
Boulder, CO
55 Years of Data
Avg High
85°F
Avg Low
56°F
Warmest
2011
80°F avg
Coldest
1987
55°F avg
About This Date
August 23rd in Boulder, CO typically brings warm summer weather, with average highs around 85°F and lows near 56°F — a 29°F daily swing. Over 55 years of records, the warmest August 23rd was in 2011 (80°F average), while the coldest was 1987 (55°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of August 23rd dates historically, with the wettest August 23rd recording 0.71" of rain. The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.1°F warmer on this date compared to 20-30 years ago.
Planning for August 23rd 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 | 81° | 61° | 71° | — | — |
| 2024 | 84° | 61° | 72° | — | — |
| 2023 | 91° | 64° | 78° | — | — |
| 2022 | 86° | 55° | 71° | — | — |
| 2021 | 90° | 64° | 77° | — | — |
| 2020 | 91° | 61° | 76° | — | — |
| 2019 | 86° | 63° | 74° | — | — |
| 2018 | 86° | 63° | 74° | — | — |
| 2017 | 87° | 58° | 72° | — | — |
| 2016 | 86° | 63° | 74° | — | — |
| 2015 | 77° | 44° | 61° | — | — |
| 2014 | 78° | 56° | 67° | 0.61" | — |
| 2013 | 86° | 58° | 72° | 0.05" | — |
| 2012 | 85° | 59° | 72° | 0.08" | — |
| 2011warmest | 98° | 62° | 80° | 0.08" | — |
| 2010 | 85° | 69° | 77° | 0.08" | — |
| 2009 | 92° | 61° | 76° | — | — |
| 2008 | 79° | 54° | 66° | 0.08" | — |
| 2007 | 80° | 54° | 67° | 0.18" | — |
| 2006 | 94° | 59° | 76° | — | — |
| 2005 | 82° | 52° | 67° | 0.03" | — |
| 2004 | 81° | 52° | 66° | — | — |
| 2003 | 88° | 59° | 73° | — | — |
| 2002 | 87° | 52° | 69° | — | — |
| 2001 | 84° | 57° | 71° | — | — |
| 2000 | 87° | 51° | 69° | — | — |
| 1999 | 82° | 54° | 68° | — | — |
| 1998 | 91° | 60° | 76° | — | — |
| 1997 | 89° | 54° | 71° | — | — |
| 1996 | 82° | 54° | 68° | — | — |
| 1995 | 85° | 58° | 71° | — | — |
| 1994 | 89° | 54° | 71° | — | — |
| 1993 | 88° | 46° | 67° | — | — |
| 1992 | 75° | 53° | 64° | 0.38" | — |
| 1991 | 88° | 58° | 73° | — | — |
| 1990 | 82° | 51° | 67° | — | — |
| 1989 | 80° | 48° | 64° | — | — |
| 1988 | 89° | 54° | 71° | — | — |
| 1987coldest | 58° | 52° | 55° | 0.71" | — |
| 1986 | 79° | 56° | 67° | 0.15" | — |
| 1985 | 83° | 52° | 67° | — | — |
| 1984 | 82° | 53° | 68° | 0.03" | — |
| 1983 | 86° | 55° | 71° | — | — |
| 1982 | 86° | 59° | 73° | — | — |
| 1981 | 84° | 51° | 68° | — | — |
| 1980 | 89° | 56° | 72° | — | — |
| 1979 | 77° | 56° | 66° | — | — |
| 1978 | 91° | 58° | 74° | — | — |
| 1977 | 84° | 59° | 72° | — | — |
| 1976 | 88° | 58° | 73° | — | — |
| 1975 | 88° | 55° | 71° | — | — |
| 1974 | 85° | 53° | 69° | — | — |
| 1973 | 91° | 58° | 74° | — | — |
| 1972 | 75° | 48° | 62° | — | — |
| 1971 | 91° | 61° | 76° | — | — |
55 years of data from BOULDER MUNI AP