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Thornton, CO Weather on April 12
April 12th in Thornton, CO typically brings mild spring weather, with average highs around 63°F and lows near 33°F — a 30°F daily swing. Over 55 years of records, the warmest April 12th was in 2023 (68°F average), while the coldest was 1997 (21°F) — a 47°F range across recorded history. Precipitation has occurred on 22% of recorded April 12th dates, with snow falling 15% of the time (heaviest snowfall: 3"). The last decade has been 5.8°F warmer on this date compared to 20-30 years ago.
What to Expect on April 12
Planning for April 12th in Thornton, CO? Great weather for outdoor activities.
April 12 Weather Records for Thornton
- •The all-time record high for April 12th in Thornton, CO is 89°F, set in 2023.
- •The coldest April 12th on record dropped to 6°F in 1997.
- •A freeze (32°F or below) has occurred on April 12th in 25 of the last 55 years.
- •Last year (1971), April 12th was 8°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest April 12 ever in Thornton?
The warmest April 12 in Thornton, CO reached 89°F in 2023. That is 26°F above the long-term average high of 63°F.
What was the coldest April 12 ever in Thornton?
The coldest April 12 in Thornton, CO dropped to 6°F in 1997. That is 27°F below the long-term average low of 33°F.
What is the average temperature on April 12 in Thornton?
On April 12, Thornton averages a high of 63°F and a low of 33°F based on 55 years of NOAA weather observations from NORTHGLENN.
How many years of weather data are available for April 12 in Thornton?
We have 55 years of weather records for April 12 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.
April 12 Weather History in Thornton
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 84°F | 41°F | 0" | -- |
| 2024 | 62°F | 35°F | 0" | -- |
| 2023 | 89°F | 46°F | 0" | -- |
| 2022 | 66°F | 27°F | 0" | -- |
| 2021 | 55°F | 28°F | 0" | -- |
| 2020 | 77°F | 21°F | 0.36" | 1.2" |
| 2019 | 50°F | 26°F | 0" | -- |
| 2018 | 84°F | 44°F | 0" | -- |
| 2017 | 69°F | 34°F | 0" | -- |
| 2016 | 59°F | 37°F | 0" | -- |
| 2015 | 72°F | 40°F | 0" | -- |
| 2014 | 79°F | 47°F | 0" | -- |
| 2013 | 57°F | 24°F | 0" | -- |
| 2012 | 73°F | 44°F | 0" | -- |
| 2011 | 64°F | 35°F | 0" | -- |
| 2010 | 78°F | 39°F | 0" | -- |
| 2009 | 64°F | 37°F | 0" | -- |
| 2008 | 52°F | 29°F | 0" | -- |
| 2007 | 54°F | 24°F | 0" | -- |
| 2006 | 74°F | 38°F | 0" | -- |
| 2005 | 49°F | 31°F | 0" | -- |
| 2004 | 52°F | 26°F | 0.05" | -- |
| 2003 | 81°F | 42°F | 0" | -- |
| 2002 | 76°F | 38°F | 0" | -- |
| 2001 | 48°F | 30°F | 0" | -- |
| 2000 | 76°F | 37°F | 0" | -- |
| 1999 | 63°F | 31°F | 0" | -- |
| 1998 | 67°F | 46°F | 0" | -- |
| 1997 | 35°F | 6°F | 0" | -- |
| 1996 | 64°F | 25°F | 0" | -- |
| 1995 | 72°F | 38°F | 0" | -- |
| 1994 | 64°F | 25°F | 0" | -- |
| 1993 | 51°F | 31°F | 0.76" | 0.8" |
| 1992 | 70°F | 43°F | 0" | -- |
| 1991 | 35°F | 27°F | 1.09" | 3" |
| 1990 | 68°F | 34°F | 0" | -- |
| 1989 | 55°F | 24°F | 0" | -- |
| 1988 | 73°F | 35°F | 0" | -- |
| 1987 | 45°F | 31°F | 1.04" | 1" |
| 1986 | 63°F | 38°F | 0" | -- |
| 1985 | 70°F | 41°F | 0" | -- |
| 1984 | 59°F | 25°F | 0" | -- |
| 1983 | 48°F | 29°F | 0.23" | 0.3" |
| 1982 | 74°F | 48°F | 0" | -- |
| 1981 | 76°F | 37°F | 0" | -- |
| 1980 | 43°F | 21°F | 0.1" | 0.4" |
| 1979 | 47°F | 24°F | 0.08" | 0.3" |
| 1978 | 69°F | 33°F | 0" | -- |
| 1977 | 50°F | 40°F | 0.97" | -- |
| 1976 | 80°F | 34°F | 0" | -- |
| 1975 | 44°F | 28°F | 0.15" | -- |
| 1974 | 59°F | 31°F | 0.15" | 0.6" |
| 1973 | 59°F | 38°F | 0" | -- |
| 1972 | 71°F | 40°F | 0.03" | -- |
| 1971 | 71°F | 32°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.