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Longmont, CO Weather on April 11
April 11th in Longmont, CO typically brings mild spring weather, with average highs around 61°F and lows near 32°F — a 29°F daily swing. Over 55 years of records, the warmest April 11th was in 1992 (61°F average), while the coldest was 1997 (15°F) — a 46°F range across recorded history. Precipitation has occurred on 27% of recorded April 11th dates, with snow falling 15% of the time (heaviest snowfall: 4"). The last decade has been 7.6°F warmer on this date compared to 20-30 years ago.
What to Expect on April 11
Planning for April 11th in Longmont, CO? Great weather for outdoor activities.
April 11 Weather Records for Longmont
- •The all-time record high for April 11th in Longmont, CO is 83°F, set in 1996.
- •The coldest April 11th on record dropped to 7°F in 1997.
- •A freeze (32°F or below) has occurred on April 11th in 27 of the last 55 years.
- •Last year (1971), April 11th was 20°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest April 11 ever in Longmont?
The warmest April 11 in Longmont, CO reached 83°F in 1996. That is 22°F above the long-term average high of 61°F.
What was the coldest April 11 ever in Longmont?
The coldest April 11 in Longmont, CO dropped to 7°F in 1997. That is 25°F below the long-term average low of 32°F.
What is the average temperature on April 11 in Longmont?
On April 11, Longmont averages a high of 61°F and a low of 32°F based on 55 years of NOAA weather observations from LONGMONT 2 ESE.
How many years of weather data are available for April 11 in Longmont?
We have 55 years of weather records for April 11 in Longmont, 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 11 Weather History in Longmont
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 72°F | 37°F | 0" | -- |
| 2024 | 61°F | 38°F | 0" | -- |
| 2023 | 79°F | 38°F | 0" | -- |
| 2022 | 54°F | 28°F | 0" | -- |
| 2021 | 73°F | 34°F | 0" | -- |
| 2020 | 78°F | 39°F | 0" | -- |
| 2019 | 42°F | 19°F | 1.4" | 3.1" |
| 2018 | 75°F | 36°F | 0" | -- |
| 2017 | 67°F | 29°F | 0" | -- |
| 2016 | 56°F | 38°F | 0.51" | -- |
| 2015 | 70°F | 34°F | 0" | -- |
| 2014 | 76°F | 43°F | 0" | -- |
| 2013 | 55°F | 17°F | 0" | -- |
| 2012 | 70°F | 44°F | 0" | -- |
| 2011 | 64°F | 31°F | 0" | -- |
| 2010 | 69°F | 33°F | 0" | -- |
| 2009 | 58°F | 32°F | 0" | -- |
| 2008 | 46°F | 31°F | 0" | -- |
| 2007 | 50°F | 32°F | 0" | -- |
| 2006 | 74°F | 46°F | 0" | -- |
| 2005 | 48°F | 29°F | 0.81" | 4" |
| 2004 | 37°F | 21°F | 0.99" | 2" |
| 2003 | 77°F | 33°F | 0" | -- |
| 2002 | 76°F | 35°F | 0.23" | -- |
| 2001 | 44°F | 26°F | 4.06" | 4" |
| 2000 | 67°F | 32°F | 0" | -- |
| 1999 | 58°F | 15°F | 0" | -- |
| 1998 | 65°F | 27°F | 0" | -- |
| 1997 | 24°F | 7°F | 0.33" | 1" |
| 1996 | 83°F | 39°F | 0" | -- |
| 1995 | 32°F | 19°F | 0.36" | -- |
| 1994 | 38°F | 27°F | 0.18" | -- |
| 1993 | 64°F | 30°F | 0" | -- |
| 1992 | 80°F | 42°F | 0" | -- |
| 1991 | 61°F | 29°F | 0.41" | 2" |
| 1990 | 37°F | 30°F | 0" | -- |
| 1989 | 44°F | 8°F | 0" | -- |
| 1988 | 56°F | 18°F | 0" | -- |
| 1987 | 69°F | 35°F | 0" | -- |
| 1986 | 66°F | 35°F | 0.18" | -- |
| 1985 | 79°F | 34°F | 0" | -- |
| 1984 | 63°F | 35°F | 0.25" | -- |
| 1983 | 67°F | 33°F | 0" | -- |
| 1982 | 68°F | 44°F | 0" | -- |
| 1981 | 69°F | 40°F | 0" | -- |
| 1980 | 60°F | 32°F | 0" | -- |
| 1979 | 50°F | 31°F | 3.33" | 2" |
| 1978 | 37°F | 25°F | 0.23" | -- |
| 1977 | 82°F | 34°F | 0" | -- |
| 1976 | 71°F | 43°F | 0" | -- |
| 1975 | 42°F | 30°F | 1.12" | 4" |
| 1974 | 58°F | 36°F | 0" | -- |
| 1973 | 46°F | 23°F | 0" | -- |
| 1972 | 74°F | 44°F | 0" | -- |
| 1971 | 81°F | 35°F | 0" | -- |
Based on 55 years of data from NOAA station: LONGMONT 2 ESE
Monthly Climate Averages
Historical temperature and precipitation averages for Longmont, CO, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.