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Boulder, CO Weather on October 12
October 12th in Boulder, CO typically brings mild fall weather, with average highs around 68°F and lows near 39°F — a 29°F daily swing. Over 55 years of records, the warmest October 12th was in 1996 (68°F average), while the coldest was 1986 (29°F) — a 39°F range across recorded history. Precipitation has occurred on 15% of recorded October 12th dates, with snow falling 4% of the time. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
What to Expect on October 12
Planning for October 12th in Boulder, CO? Great weather for outdoor activities.
October 12 Weather Records for Boulder
- •The all-time record high for October 12th in Boulder, CO is 85°F, set in 1996.
- •The coldest October 12th on record dropped to 23°F in 2009.
- •A freeze (32°F or below) has occurred on October 12th in 8 of the last 55 years.
- •Last year (1971), October 12th was 9°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest October 12 ever in Boulder?
The warmest October 12 in Boulder, CO reached 85°F in 1996. That is 17°F above the long-term average high of 68°F.
What was the coldest October 12 ever in Boulder?
The coldest October 12 in Boulder, CO dropped to 23°F in 2009. That is 16°F below the long-term average low of 39°F.
What is the average temperature on October 12 in Boulder?
On October 12, Boulder averages a high of 68°F and a low of 39°F based on 55 years of NOAA weather observations from BOULDER MUNI AP.
How many years of weather data are available for October 12 in Boulder?
We have 55 years of weather records for October 12 in Boulder, 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 12 Weather History in Boulder
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 68°F | 48°F | -- | -- |
| 2024 | 81°F | 48°F | -- | -- |
| 2023 | 59°F | 41°F | -- | -- |
| 2022 | 70°F | 37°F | 0" | -- |
| 2021 | 50°F | 36°F | -- | -- |
| 2020 | 73°F | 50°F | 0" | -- |
| 2019 | 64°F | 30°F | -- | -- |
| 2018 | 61°F | 34°F | -- | -- |
| 2017 | 78°F | 40°F | 0" | -- |
| 2016 | 66°F | 35°F | 0.16" | -- |
| 2015 | 78°F | 41°F | 0" | -- |
| 2014 | 67°F | 44°F | 0.02" | -- |
| 2013 | 56°F | 41°F | 0" | -- |
| 2012 | 63°F | 31°F | 0" | -- |
| 2011 | 69°F | 40°F | 0" | -- |
| 2010 | 57°F | 41°F | 0.53" | -- |
| 2009 | 46°F | 23°F | 0" | -- |
| 2008 | 39°F | 35°F | 0.32" | -- |
| 2007 | 67°F | 41°F | 0" | -- |
| 2006 | 62°F | 35°F | 0" | -- |
| 2005 | 61°F | 37°F | 0" | -- |
| 2004 | 70°F | 37°F | 0" | -- |
| 2003 | 81°F | 36°F | 0" | -- |
| 2002 | 71°F | 31°F | 0" | -- |
| 2001 | 57°F | 40°F | 0" | -- |
| 2000 | 68°F | 43°F | 0" | -- |
| 1999 | 81°F | 51°F | 0" | -- |
| 1998 | 70°F | 33°F | 0" | -- |
| 1997 | 68°F | 32°F | 0.28" | 0.2" |
| 1996 | 85°F | 52°F | 0" | -- |
| 1995 | 81°F | 54°F | 0" | -- |
| 1994 | 71°F | 47°F | 0" | -- |
| 1993 | 64°F | 42°F | 0" | -- |
| 1992 | 79°F | 40°F | 0" | -- |
| 1991 | 83°F | 45°F | 0" | -- |
| 1990 | 67°F | 28°F | 0" | -- |
| 1989 | 82°F | 37°F | 0" | -- |
| 1988 | 80°F | 44°F | 0" | -- |
| 1987 | 78°F | 35°F | 0" | -- |
| 1986 | 36°F | 23°F | 0.18" | 0.5" |
| 1985 | 70°F | 36°F | 0" | -- |
| 1984 | 74°F | 42°F | 0.2" | -- |
| 1983 | 60°F | 37°F | 0" | -- |
| 1982 | 56°F | 34°F | 0" | -- |
| 1981 | 69°F | 41°F | 0" | -- |
| 1980 | 81°F | 40°F | 0" | -- |
| 1979 | 71°F | 45°F | 0" | -- |
| 1978 | 73°F | 52°F | 0" | -- |
| 1977 | 68°F | 26°F | 0" | -- |
| 1976 | 66°F | 42°F | 0" | -- |
| 1975 | 83°F | 39°F | 0" | -- |
| 1974 | 50°F | 40°F | 1.2" | -- |
| 1973 | 60°F | 33°F | 0" | -- |
| 1972 | 77°F | 38°F | 0" | -- |
| 1971 | 77°F | 52°F | 0" | -- |
Based on 55 years of data from NOAA station: BOULDER MUNI AP
Monthly Climate Averages
Historical temperature and precipitation averages for Boulder, CO, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.