Weather on October 17
Boulder, CO
55 Years of Data
Avg High
67°F
Avg Low
38°F
Warmest
1991
72°F avg
Coldest
1989
31°F avg
About This Date
October 17th in Boulder, CO typically brings mild fall weather, with average highs around 67°F and lows near 38°F — a 29°F daily swing. Over 55 years of records, the warmest October 17th was in 1991 (72°F average), while the coldest was 1989 (31°F) — a 41°F range across recorded history. Precipitation has occurred on 13% of recorded October 17th dates, with snow falling 4% of the time (heaviest snowfall: 3.7"). The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.6°F warmer on this date compared to 20-30 years ago.
Planning for October 17th in Boulder, CO? Great weather for outdoor activities.
Warming Trend
0.8°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 37° | 53° | — | — |
| 2024 | 77° | 50° | 64° | — | — |
| 2023 | 82° | 45° | 63° | — | — |
| 2022 | 64° | 36° | 50° | — | — |
| 2021 | 73° | 37° | 55° | — | — |
| 2020 | 73° | 41° | 57° | — | — |
| 2019 | 77° | 43° | 60° | — | — |
| 2018 | 61° | 36° | 48° | — | — |
| 2017 | 79° | 37° | 58° | — | — |
| 2016 | 78° | 39° | 59° | — | — |
| 2015 | 78° | 41° | 60° | — | — |
| 2014 | 62° | 37° | 50° | — | — |
| 2013 | 48° | 33° | 41° | — | — |
| 2012 | 71° | 39° | 55° | 0.03" | — |
| 2011 | 58° | 42° | 50° | — | — |
| 2010 | 77° | 37° | 57° | — | — |
| 2009 | 69° | 32° | 51° | — | — |
| 2008 | 70° | 38° | 54° | — | — |
| 2007 | 61° | 39° | 50° | — | — |
| 2006 | 59° | 31° | 45° | 1.5" | 3.7" |
| 2005 | 79° | 47° | 63° | — | — |
| 2004 | 75° | 49° | 62° | — | — |
| 2003 | 85° | 39° | 62° | — | — |
| 2002 | 66° | 28° | 47° | — | — |
| 2001 | 80° | 44° | 62° | — | — |
| 2000 | 67° | 34° | 50° | — | — |
| 1999 | 50° | 15° | 33° | — | — |
| 1998 | 51° | 32° | 42° | 0.08" | — |
| 1997 | 76° | 41° | 58° | — | — |
| 1996 | 48° | 35° | 42° | 0.18" | — |
| 1995 | 73° | 44° | 59° | — | — |
| 1994 | 45° | 35° | 40° | 1.12" | — |
| 1993 | 58° | 42° | 50° | 1.24" | — |
| 1992 | 71° | 34° | 52° | — | — |
| 1991warmest | 84° | 59° | 72° | — | — |
| 1990 | 65° | 37° | 51° | — | — |
| 1989coldest | 35° | 26° | 31° | 0.38" | 1" |
| 1988 | 71° | 51° | 61° | — | — |
| 1987 | 72° | 33° | 52° | — | — |
| 1986 | 72° | 38° | 55° | — | — |
| 1985 | 65° | 39° | 52° | — | — |
| 1984 | 45° | 20° | 32° | — | — |
| 1983 | 67° | 32° | 49° | — | — |
| 1982 | 74° | 43° | 58° | — | — |
| 1981 | 49° | 35° | 42° | — | — |
| 1980 | 58° | 31° | 44° | — | — |
| 1979 | 60° | 45° | 52° | — | — |
| 1978 | 67° | 40° | 53° | — | — |
| 1977 | 75° | 42° | 59° | — | — |
| 1976 | 72° | 30° | 51° | — | — |
| 1975 | 64° | 33° | 49° | — | — |
| 1974 | 78° | 46° | 62° | — | — |
| 1973 | 72° | 45° | 58° | — | — |
| 1972 | 74° | 46° | 60° | — | — |
| 1971 | 58° | 45° | 51° | — | — |
55 years of data from BOULDER MUNI AP