Weather on November 18
Boulder, CO
55 Years of Data
Avg High
54°F
Avg Low
28°F
Warmest
2020
63°F avg
Coldest
2022
16°F avg
About This Date
November 18th in Boulder, CO typically brings cool fall weather, with average highs around 54°F and lows near 28°F — a 26°F daily swing. Over 55 years of records, the warmest November 18th was in 2020 (63°F average), while the coldest was 2022 (16°F) — a 47°F range across recorded history. Precipitation has occurred on 22% of recorded November 18th dates, with snow falling 11% of the time (heaviest snowfall: 2.9"). The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for November 18th in Boulder, CO? Bring layers as temperatures can vary throughout the day.
Warming Trend
1.0°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 64° | 43° | 53° | — | — |
| 2024 | 59° | 30° | 45° | — | — |
| 2023 | 59° | 34° | 46° | — | — |
| 2022coldest | 23° | 9° | 16° | 0.15" | — |
| 2021 | 45° | 21° | 33° | — | — |
| 2020warmest | 75° | 50° | 63° | — | — |
| 2019 | 66° | 45° | 55° | — | — |
| 2018 | 43° | 16° | 30° | — | — |
| 2017 | 51° | 24° | 38° | 0.1" | — |
| 2016 | 37° | 16° | 26° | 0.25" | 1.4" |
| 2015 | 54° | 31° | 42° | — | — |
| 2014 | 47° | 23° | 35° | — | — |
| 2013 | 65° | 26° | 45° | — | — |
| 2012 | 62° | 35° | 49° | — | — |
| 2011 | 67° | 41° | 54° | — | — |
| 2010 | 66° | 26° | 46° | — | — |
| 2009 | 58° | 29° | 43° | — | — |
| 2008 | 78° | 47° | 62° | — | — |
| 2007 | 69° | 44° | 57° | — | — |
| 2006 | 55° | 30° | 43° | — | — |
| 2005 | 59° | 22° | 40° | — | — |
| 2004 | 51° | 36° | 43° | — | — |
| 2003 | 53° | 26° | 40° | — | — |
| 2002 | 55° | 28° | 42° | — | — |
| 2001 | 53° | 30° | 42° | 0.46" | 0.6" |
| 2000 | 44° | 3° | 24° | 0.28" | 2.9" |
| 1999 | 62° | — | — | — | — |
| 1998 | 55° | 37° | 46° | — | — |
| 1997 | 47° | 27° | 37° | — | — |
| 1996 | 56° | 26° | 41° | — | — |
| 1995 | 71° | 36° | 53° | — | — |
| 1994 | 34° | 17° | 25° | — | — |
| 1993 | 52° | 26° | 39° | — | — |
| 1992 | 52° | 28° | 40° | — | — |
| 1991 | 48° | 29° | 38° | 0.53" | 1.6" |
| 1990 | 58° | 38° | 48° | — | — |
| 1989 | 54° | 16° | 35° | — | — |
| 1988 | 40° | 22° | 31° | — | — |
| 1987 | 44° | 14° | 29° | 0.03" | 0.1" |
| 1986 | 54° | 32° | 43° | — | — |
| 1985 | 37° | 26° | 32° | 0.03" | 0.3" |
| 1984 | 53° | 18° | 35° | — | — |
| 1983 | 53° | 33° | 43° | 1.4" | — |
| 1982 | 59° | 23° | 41° | — | — |
| 1981 | 68° | 42° | 55° | — | — |
| 1980 | 49° | 22° | 35° | — | — |
| 1979 | 58° | 38° | 48° | — | — |
| 1978 | 56° | 23° | 39° | — | — |
| 1977 | 47° | 23° | 35° | — | — |
| 1976 | 68° | 45° | 56° | — | — |
| 1975 | 47° | 25° | 36° | — | — |
| 1974 | 60° | 37° | 49° | 0.03" | — |
| 1973 | 53° | 29° | 41° | — | — |
| 1972 | 39° | 22° | 30° | 0.03" | — |
| 1971 | 30° | 16° | 23° | 0.03" | — |
55 years of data from BOULDER MUNI AP