Kingshuk Mondal / CC BY 4.0
Thornton, CO Weather on August 25
August 25th in Thornton, CO typically brings warm summer weather, with average highs around 87°F and lows near 55°F — a 32°F daily swing. Over 55 years of records, the warmest August 25th was in 2006 (79°F average), while the coldest was 2016 (56°F) — a 23°F range across recorded history. Rain or other precipitation has occurred on about 22% of August 25th dates historically. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on August 25
Planning for August 25th in Thornton, CO? Stay hydrated and seek shade during peak afternoon hours.
August 25 Weather Records for Thornton
- •The all-time record high for August 25th in Thornton, CO is 98°F, set in 2020.
- •The coldest August 25th on record dropped to 43°F in 1975.
- •Temperatures have reached 90°F or higher on August 25th in 24 of the last 55 years.
Frequently Asked Questions
What was the warmest August 25 ever in Thornton?
The warmest August 25 in Thornton, CO reached 98°F in 2020. That is 11°F above the long-term average high of 87°F.
What was the coldest August 25 ever in Thornton?
The coldest August 25 in Thornton, CO dropped to 43°F in 1975. That is 12°F below the long-term average low of 55°F.
What is the average temperature on August 25 in Thornton?
On August 25, Thornton averages a high of 87°F and a low of 55°F based on 55 years of NOAA weather observations from NORTHGLENN.
How many years of weather data are available for August 25 in Thornton?
We have 55 years of weather records for August 25 in Thornton, 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 25 Weather History in Thornton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 86°F | 57°F | 0" | -- |
| 2024 | 93°F | 60°F | 0.02" | -- |
| 2023 | 95°F | 62°F | 0.03" | -- |
| 2022 | 92°F | 55°F | 0" | -- |
| 2021 | 96°F | 60°F | 0" | -- |
| 2020 | 98°F | 59°F | 0" | -- |
| 2019 | 91°F | 56°F | 0" | -- |
| 2018 | 90°F | 59°F | 0" | -- |
| 2017 | 88°F | 53°F | 0" | -- |
| 2016 | 67°F | 46°F | 0.07" | -- |
| 2015 | 94°F | 55°F | 0" | -- |
| 2014 | 88°F | 53°F | 0" | -- |
| 2013 | 90°F | 58°F | 0.05" | -- |
| 2012 | 86°F | 58°F | 0" | -- |
| 2011 | 98°F | 59°F | 0" | -- |
| 2010 | 80°F | 54°F | 0" | -- |
| 2009 | 88°F | 57°F | 0" | -- |
| 2008 | 90°F | 57°F | 0" | -- |
| 2007 | 86°F | 51°F | 0" | -- |
| 2006 | 95°F | 63°F | 0" | -- |
| 2005 | 93°F | 55°F | 0" | -- |
| 2004 | 82°F | 55°F | 0" | -- |
| 2003 | 94°F | 57°F | 0" | -- |
| 2002 | 96°F | 56°F | 0" | -- |
| 2001 | 83°F | 63°F | 0" | -- |
| 2000 | 91°F | 61°F | 0" | -- |
| 1999 | 88°F | 58°F | 0" | -- |
| 1998 | 82°F | 57°F | 0" | -- |
| 1997 | 90°F | 59°F | 0" | -- |
| 1996 | 84°F | 51°F | 0" | -- |
| 1995 | 86°F | 58°F | 0" | -- |
| 1994 | 91°F | 59°F | 0.02" | -- |
| 1993 | 90°F | 61°F | 0" | -- |
| 1992 | 68°F | 48°F | 0.1" | -- |
| 1991 | 91°F | 57°F | 0" | -- |
| 1990 | 90°F | 57°F | 0" | -- |
| 1989 | 85°F | 55°F | 0" | -- |
| 1988 | 81°F | 58°F | 0" | -- |
| 1987 | 74°F | 49°F | 0.43" | -- |
| 1986 | 84°F | 57°F | 0" | -- |
| 1985 | 89°F | 49°F | 0" | -- |
| 1984 | 83°F | 55°F | 0.03" | -- |
| 1983 | 88°F | 57°F | 0" | -- |
| 1982 | 80°F | 52°F | 0" | -- |
| 1981 | 86°F | 53°F | 0" | -- |
| 1980 | 78°F | 59°F | 0.01" | -- |
| 1979 | 78°F | 50°F | 0.01" | -- |
| 1978 | 82°F | 54°F | 0" | -- |
| 1977 | 91°F | 54°F | 0" | -- |
| 1976 | 88°F | 50°F | 0.03" | -- |
| 1975 | 83°F | 43°F | 0" | -- |
| 1974 | 88°F | 48°F | 0" | -- |
| 1973 | 93°F | 62°F | 0" | -- |
| 1972 | 73°F | 45°F | 0.01" | -- |
| 1971 | 91°F | 56°F | 0" | -- |
Based on 55 years of data from NOAA station: NORTHGLENN
Monthly Climate Averages
Historical temperature and precipitation averages for Thornton, CO, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.