Michael D Beckwith / CC BY 2.0
Boulder, CO Weather on August 28
August 28th in Boulder, CO typically brings warm summer weather, with average highs around 83°F and lows near 55°F — a 28°F daily swing. Over 55 years of records, the warmest August 28th was in 2022 (81°F average), while the coldest was 2004 (57°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 20% of August 28th dates historically. The last decade has been 2.2°F warmer on this date compared to 20-30 years ago.
What to Expect on August 28
Planning for August 28th in Boulder, CO? Stay hydrated and seek shade during peak afternoon hours.
August 28 Weather Records for Boulder
- •The all-time record high for August 28th in Boulder, CO is 95°F, set in 1984.
- •The coldest August 28th on record dropped to 40°F in 2004.
- •Temperatures have reached 90°F or higher on August 28th in 14 of the last 55 years.
Frequently Asked Questions
What was the warmest August 28 ever in Boulder?
The warmest August 28 in Boulder, CO reached 95°F in 1984. That is 12°F above the long-term average high of 83°F.
What was the coldest August 28 ever in Boulder?
The coldest August 28 in Boulder, CO dropped to 40°F in 2004. That is 15°F below the long-term average low of 55°F.
What is the average temperature on August 28 in Boulder?
On August 28, Boulder averages a high of 83°F and a low of 55°F based on 55 years of NOAA weather observations from BOULDER MUNI AP.
How many years of weather data are available for August 28 in Boulder?
We have 55 years of weather records for August 28 in Boulder, CO, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 28 Weather History in Boulder
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 81°F | 55°F | -- | -- |
| 2024 | 91°F | 55°F | -- | -- |
| 2023 | 77°F | 57°F | -- | -- |
| 2022 | 91°F | 72°F | 0" | -- |
| 2021 | 86°F | 59°F | 0" | -- |
| 2020 | 77°F | 59°F | -- | -- |
| 2019 | 91°F | 54°F | -- | -- |
| 2018 | 72°F | 54°F | -- | -- |
| 2017 | 90°F | 53°F | 0" | -- |
| 2016 | 86°F | 56°F | 0" | -- |
| 2015 | 85°F | 55°F | 0" | -- |
| 2014 | 66°F | 50°F | 0.34" | -- |
| 2013 | 93°F | 61°F | 0" | -- |
| 2012 | 93°F | 61°F | 0" | -- |
| 2011 | 94°F | 65°F | 0.01" | -- |
| 2010 | 93°F | 66°F | 0" | -- |
| 2009 | 84°F | 54°F | 0" | -- |
| 2008 | 75°F | 56°F | 0" | -- |
| 2007 | 84°F | 55°F | 0.18" | -- |
| 2006 | 76°F | 48°F | 0" | -- |
| 2005 | 88°F | 53°F | 0" | -- |
| 2004 | 75°F | 40°F | 0.05" | -- |
| 2003 | 81°F | 66°F | 0" | -- |
| 2002 | 76°F | 56°F | 0" | -- |
| 2001 | 89°F | 57°F | 0" | -- |
| 2000 | 85°F | 58°F | 0.01" | -- |
| 1999 | 76°F | 55°F | 0.17" | -- |
| 1998 | 86°F | 50°F | 0" | -- |
| 1997 | 88°F | 61°F | 0.27" | -- |
| 1996 | 85°F | 52°F | 0" | -- |
| 1995 | 90°F | 58°F | 0" | -- |
| 1994 | 73°F | 58°F | 0.04" | -- |
| 1993 | 69°F | 48°F | 0" | -- |
| 1992 | 85°F | 52°F | 0" | -- |
| 1991 | 85°F | 62°F | 0.01" | -- |
| 1990 | 90°F | 60°F | 0" | -- |
| 1989 | 80°F | 47°F | 0" | -- |
| 1988 | 76°F | 46°F | 0" | -- |
| 1987 | 81°F | 46°F | 0" | -- |
| 1986 | 81°F | 53°F | 0" | -- |
| 1985 | 90°F | 61°F | 0.01" | -- |
| 1984 | 95°F | 64°F | 0" | -- |
| 1983 | 91°F | 55°F | 0" | -- |
| 1982 | 90°F | 57°F | 0" | -- |
| 1981 | 82°F | 52°F | 0" | -- |
| 1980 | 88°F | 54°F | 0" | -- |
| 1979 | 77°F | 54°F | 0" | -- |
| 1978 | 76°F | 53°F | 0" | -- |
| 1977 | 73°F | 48°F | 0.12" | -- |
| 1976 | 84°F | 48°F | 0" | -- |
| 1975 | 88°F | 56°F | 0" | -- |
| 1974 | 81°F | 52°F | 0" | -- |
| 1973 | 88°F | 61°F | 0" | -- |
| 1972 | 79°F | 53°F | 0" | -- |
| 1971 | 84°F | 58°F | 0" | -- |
Based on 55 years of data from NOAA station: BOULDER MUNI AP
Monthly Climate Averages
Historical temperature and precipitation averages for Boulder, CO, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.