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Longmont, CO Weather on October 9
October 9th in Longmont, CO typically brings mild fall weather, with average highs around 68°F and lows near 37°F — a 31°F daily swing. Over 55 years of records, the warmest October 9th was in 2020 (63°F average), while the coldest was 1985 (32°F) — a 31°F range across recorded history. Precipitation has occurred on 18% of recorded October 9th dates, with snow falling 2% of the time. The last decade has been 1.5°F warmer on this date compared to 20-30 years ago.
What to Expect on October 9
Planning for October 9th in Longmont, CO? Great weather for outdoor activities.
October 9 Weather Records for Longmont
- •The all-time record high for October 9th in Longmont, CO is 86°F, set in 1979.
- •The coldest October 9th on record dropped to 23°F in 2000.
- •A freeze (32°F or below) has occurred on October 9th in 12 of the last 55 years.
Frequently Asked Questions
What was the warmest October 9 ever in Longmont?
The warmest October 9 in Longmont, CO reached 86°F in 1979. That is 18°F above the long-term average high of 68°F.
What was the coldest October 9 ever in Longmont?
The coldest October 9 in Longmont, CO dropped to 23°F in 2000. That is 14°F below the long-term average low of 37°F.
What is the average temperature on October 9 in Longmont?
On October 9, Longmont averages a high of 68°F and a low of 37°F based on 55 years of NOAA weather observations from LONGMONT 2 ESE.
How many years of weather data are available for October 9 in Longmont?
We have 55 years of weather records for October 9 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.
October 9 Weather History in Longmont
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 72°F | 39°F | 0" | -- |
| 2024 | 83°F | 43°F | 0" | -- |
| 2023 | 77°F | 39°F | 0" | -- |
| 2022 | 64°F | 38°F | 0" | -- |
| 2021 | 75°F | 46°F | 0" | -- |
| 2020 | 85°F | 41°F | 0" | -- |
| 2019 | 75°F | 39°F | 0" | -- |
| 2018 | 37°F | 34°F | -- | -- |
| 2017 | 63°F | 33°F | 0.45" | 0.3" |
| 2016 | 77°F | 38°F | 0" | -- |
| 2015 | 73°F | 43°F | 0" | -- |
| 2014 | 63°F | 47°F | 0.99" | -- |
| 2013 | 64°F | 46°F | 0" | -- |
| 2012 | 67°F | 34°F | 0" | -- |
| 2011 | 55°F | 33°F | 0" | -- |
| 2010 | 67°F | 40°F | 0" | -- |
| 2009 | 51°F | 31°F | 0.01" | -- |
| 2008 | 65°F | 36°F | 0" | -- |
| 2007 | 75°F | 39°F | 0" | -- |
| 2006 | 48°F | 36°F | 0.69" | -- |
| 2005 | 63°F | 41°F | 0.56" | -- |
| 2004 | 70°F | 36°F | 0" | -- |
| 2003 | 82°F | 42°F | 0" | -- |
| 2002 | 69°F | 43°F | 0" | -- |
| 2001 | 81°F | 39°F | 0" | -- |
| 2000 | 56°F | 23°F | 0" | -- |
| 1999 | 70°F | 36°F | 0" | -- |
| 1998 | 79°F | 35°F | 0" | -- |
| 1997 | 63°F | 26°F | 0" | -- |
| 1996 | 79°F | 36°F | 0" | -- |
| 1995 | 68°F | 33°F | 0" | -- |
| 1994 | 64°F | 32°F | 0" | -- |
| 1993 | 49°F | 24°F | 0" | -- |
| 1992 | 62°F | 45°F | 0" | -- |
| 1991 | 85°F | 37°F | 0" | -- |
| 1990 | 41°F | 23°F | 0" | -- |
| 1989 | 74°F | 33°F | 0" | -- |
| 1988 | 72°F | 38°F | 0" | -- |
| 1987 | 77°F | 38°F | 0" | -- |
| 1986 | 75°F | 40°F | 0.03" | -- |
| 1985 | 38°F | 27°F | 0.01" | -- |
| 1984 | 64°F | 35°F | 0" | -- |
| 1983 | 62°F | 39°F | 0" | -- |
| 1982 | 50°F | 31°F | 0.24" | -- |
| 1981 | 74°F | 44°F | 0.01" | -- |
| 1980 | 80°F | 40°F | 0" | -- |
| 1979 | 86°F | 34°F | 0.13" | -- |
| 1978 | 82°F | 43°F | 0" | -- |
| 1977 | 67°F | 32°F | 0" | -- |
| 1976 | 77°F | 30°F | 0" | -- |
| 1975 | 63°F | 32°F | 0" | -- |
| 1974 | 77°F | 36°F | 0" | -- |
| 1973 | 73°F | 38°F | 0" | -- |
| 1972 | 69°F | 44°F | 0" | -- |
| 1971 | 64°F | 32°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.