Joshua Tree National Park / Public domain
Thornton, CO Weather on May 27
May 27th in Thornton, CO typically brings pleasant spring weather, with average highs around 76°F and lows near 47°F — a 29°F daily swing. Over 55 years of records, the warmest May 27th was in 2018 (76°F average), while the coldest was 1996 (43°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 27% of May 27th dates historically, with the wettest May 27th recording 1.6" of rain. Temperatures on this date have remained relatively stable over the past several decades.
What to Expect on May 27
Planning for May 27th in Thornton, CO? Great weather for outdoor activities.
May 27 Weather Records for Thornton
- •The all-time record high for May 27th in Thornton, CO is 94°F, set in 2018.
- •The coldest May 27th on record dropped to 35°F in 1996.
- •Temperatures have reached 90°F or higher on May 27th in 5 of the last 55 years.
Frequently Asked Questions
What was the warmest May 27 ever in Thornton?
The warmest May 27 in Thornton, CO reached 94°F in 2018. That is 18°F above the long-term average high of 76°F.
What was the coldest May 27 ever in Thornton?
The coldest May 27 in Thornton, CO dropped to 35°F in 1996. That is 12°F below the long-term average low of 47°F.
What is the average temperature on May 27 in Thornton?
On May 27, Thornton averages a high of 76°F and a low of 47°F based on 55 years of NOAA weather observations from NORTHGLENN.
How many years of weather data are available for May 27 in Thornton?
We have 55 years of weather records for May 27 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.
May 27 Weather History in Thornton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 64°F | 43°F | 0.03" | -- |
| 2024 | 80°F | 45°F | 0" | -- |
| 2023 | 72°F | 47°F | 1.02" | -- |
| 2022 | 86°F | 49°F | 0" | -- |
| 2021 | 77°F | 46°F | 0" | -- |
| 2020 | 90°F | 55°F | 0" | -- |
| 2019 | 75°F | 48°F | 0.2" | -- |
| 2018 | 94°F | 58°F | 0" | -- |
| 2017 | 72°F | 44°F | 0.03" | -- |
| 2016 | 66°F | 48°F | 0.08" | -- |
| 2015 | 72°F | 46°F | 0.1" | -- |
| 2014 | 78°F | 52°F | 0" | -- |
| 2013 | 87°F | 47°F | 0" | -- |
| 2012 | 88°F | 45°F | 0" | -- |
| 2011 | 70°F | 46°F | 0" | -- |
| 2010 | 77°F | 53°F | 0" | -- |
| 2009 | 66°F | 42°F | 0" | -- |
| 2008 | 62°F | 42°F | 0.97" | -- |
| 2007 | 79°F | 46°F | 0" | -- |
| 2006 | 87°F | 56°F | 0" | -- |
| 2005 | 70°F | 46°F | 0" | -- |
| 2004 | 82°F | 52°F | 0" | -- |
| 2003 | 90°F | 52°F | 0" | -- |
| 2002 | 84°F | 48°F | 0" | -- |
| 2001 | 82°F | 56°F | 0" | -- |
| 2000 | 83°F | 45°F | 0" | -- |
| 1999 | 68°F | 51°F | 0.05" | -- |
| 1998 | 90°F | 49°F | 0" | -- |
| 1997 | 72°F | 41°F | 0.15" | -- |
| 1996 | 52°F | 35°F | 0.03" | -- |
| 1995 | 52°F | 40°F | 1.6" | -- |
| 1994 | 82°F | 42°F | 0" | -- |
| 1993 | 79°F | 53°F | 0" | -- |
| 1992 | 51°F | 40°F | 0.3" | -- |
| 1991 | 76°F | 50°F | 0" | -- |
| 1990 | 70°F | 46°F | 0" | -- |
| 1989 | 82°F | 46°F | 0" | -- |
| 1988 | 82°F | 46°F | 0" | -- |
| 1987 | 67°F | 39°F | 0" | -- |
| 1986 | 64°F | 45°F | 0" | -- |
| 1985 | 81°F | 46°F | 0" | -- |
| 1984 | 77°F | 47°F | 0" | -- |
| 1983 | 82°F | 49°F | 0" | -- |
| 1982 | 85°F | 48°F | 0" | -- |
| 1981 | 78°F | 54°F | 0" | -- |
| 1980 | 83°F | 48°F | 0" | -- |
| 1979 | 81°F | 53°F | 0" | -- |
| 1978 | 64°F | 52°F | 0.36" | -- |
| 1977 | 75°F | 38°F | 0.2" | -- |
| 1976 | 77°F | 43°F | 0" | -- |
| 1975 | 74°F | 38°F | 0" | -- |
| 1974 | 90°F | 51°F | 0" | -- |
| 1973 | 65°F | 40°F | 0" | -- |
| 1972 | 71°F | 48°F | 0.13" | -- |
| 1971 | 73°F | 47°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.