Weather on November 21
Longmont, CO
55 Years of Data
About This Date
November 21st in Longmont, CO typically brings cool fall weather, with average highs around 52°F and lows near 23°F — a 29°F daily swing. Over 55 years of records, the warmest November 21st was in 1998 (58°F average), while the coldest was 1985 (15°F) — a 43°F range across recorded history. Precipitation has occurred on 16% of recorded November 21st dates, with snow falling 15% of the time (heaviest snowfall: 7"). Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for November 21st in Longmont, CO? Bring layers as temperatures can vary throughout the day.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 51° | 40° | 45° | 0.03" | — |
| 2024 | 45° | 22° | 33° | — | — |
| 2023 | 50° | 26° | 38° | — | — |
| 2022 | 47° | 14° | 30° | — | — |
| 2021 | 56° | 24° | 40° | — | — |
| 2020 | 56° | 25° | 40° | — | — |
| 2019 | 52° | 27° | 39° | 0.53" | 0.9" |
| 2018 | 55° | 22° | 38° | — | — |
| 2017 | 71° | 45° | 58° | — | — |
| 2016 | 65° | 39° | 52° | — | — |
| 2015 | 48° | 11° | 29° | 0.23" | 1.6" |
| 2014 | 58° | 30° | 44° | — | — |
| 2013 | 58° | 13° | 35° | 0.64" | 5.8" |
| 2012 | 73° | 37° | 55° | — | — |
| 2011 | 52° | 25° | 38° | — | — |
| 2010 | 51° | 22° | 36° | — | — |
| 2009 | 63° | 29° | 46° | — | — |
| 2008 | 55° | 25° | 40° | — | — |
| 2007 | 35° | 22° | 28° | 1.12" | 5.8" |
| 2006 | 70° | 44° | 57° | — | — |
| 2005 | 59° | 32° | 46° | — | — |
| 2004 | 30° | 19° | 25° | 0.38" | 0.2" |
| 2003 | 74° | 28° | 51° | — | — |
| 2002 | 64° | 30° | 47° | — | — |
| 2001 | 63° | 14° | 38° | — | — |
| 2000 | 47° | 10° | 28° | — | — |
| 1999 | 69° | 29° | 49° | — | — |
| 1998warmest | 65° | 52° | 58° | — | — |
| 1997 | 49° | 20° | 34° | — | — |
| 1996 | 70° | 23° | 46° | — | — |
| 1995 | 51° | 20° | 35° | — | — |
| 1994 | 56° | 21° | 38° | — | — |
| 1993 | 50° | 13° | 31° | — | — |
| 1992 | 36° | 21° | 28° | 1.47" | 4" |
| 1991 | 51° | 16° | 33° | — | — |
| 1990 | 64° | 30° | 47° | — | — |
| 1989 | 62° | 19° | 41° | — | — |
| 1988 | 46° | 12° | 29° | — | — |
| 1987 | 54° | 21° | 37° | — | — |
| 1986 | 57° | 24° | 41° | — | — |
| 1985coldest | 26° | 4° | 15° | — | — |
| 1984 | 54° | 14° | 34° | — | — |
| 1983 | 53° | 21° | 37° | — | — |
| 1982 | 53° | 19° | 36° | — | — |
| 1981 | 50° | 19° | 35° | — | — |
| 1980 | 49° | 17° | 33° | — | — |
| 1979 | 29° | 20° | 24° | 1.5" | 7" |
| 1978 | 23° | 16° | 19° | — | — |
| 1977 | 33° | 3° | 18° | — | — |
| 1976 | 46° | 20° | 33° | — | — |
| 1975 | 32° | 6° | 19° | — | — |
| 1974 | 64° | 25° | 44° | — | — |
| 1973 | 38° | 17° | 27° | — | — |
| 1972 | 28° | 20° | 24° | 0.53" | 3" |
| 1971 | 62° | 22° | 42° | — | — |
Longmont, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Longmont, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Longmont, CO Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Longmont, CO
Longmont, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.