Weather on December 20
Alamosa, CO
55 Years of Data
About This Date
December 20th in Alamosa, CO typically brings cold winter weather, with average highs around 35°F and lows near 0°F — a 35°F daily swing. Over 55 years of records, the warmest December 20th was in 1998 (35°F average), while the coldest was 1992 (-6°F) — a 41°F range across recorded history. Precipitation has occurred on 13% of recorded December 20th dates, with snow falling 11% of the time (heaviest snowfall: 2"). 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 December 20th in Alamosa, CO? Bundle up with warm layers and protect extremities from the cold.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | — | 13° | — | — | — |
| 2024 | 48° | 3° | 26° | — | — |
| 2023 | 36° | 7° | 21° | — | — |
| 2022 | 37° | -6° | 16° | — | — |
| 2021 | 41° | -3° | 19° | — | — |
| 2020 | 34° | 1° | 17° | — | — |
| 2019 | 26° | -11° | 8° | — | — |
| 2018 | 46° | 8° | 27° | — | — |
| 2017 | 47° | 5° | 26° | — | — |
| 2016 | 23° | -7° | 8° | — | — |
| 2015 | 38° | 4° | 21° | — | — |
| 2014 | 36° | 8° | 22° | — | — |
| 2013 | 33° | 0° | 17° | — | — |
| 2012 | 31° | -21° | 5° | 0.05" | 0.2" |
| 2011 | 35° | -1° | 17° | — | — |
| 2010 | 43° | 18° | 30° | — | — |
| 2009 | 35° | -2° | 17° | — | — |
| 2008 | 35° | 12° | 24° | — | — |
| 2007 | 27° | -7° | 10° | — | — |
| 2006 | 37° | 19° | 28° | 0.15" | 1.8" |
| 2005 | 46° | 3° | 25° | — | — |
| 2004 | 50° | -2° | 24° | — | — |
| 2003 | 38° | -1° | 19° | — | — |
| 2002 | 36° | -6° | 15° | — | — |
| 2001 | 39° | -4° | 18° | — | — |
| 2000 | 39° | 1° | 20° | — | — |
| 1999 | 34° | -3° | 16° | — | — |
| 1998warmest | 40° | 30° | 35° | — | — |
| 1997 | 21° | -8° | 7° | — | — |
| 1996 | 33° | -7° | 13° | — | — |
| 1995 | 31° | 0° | 15° | — | — |
| 1994 | 40° | 3° | 21° | — | — |
| 1993 | 25° | -11° | 7° | 0.03" | — |
| 1992coldest | 14° | -27° | -6° | — | — |
| 1991 | 36° | 1° | 18° | 0.03" | 0.1" |
| 1990 | 28° | 16° | 22° | 0.43" | 2" |
| 1989 | 39° | -5° | 17° | — | — |
| 1988 | 37° | -1° | 18° | — | — |
| 1987 | 29° | 6° | 17° | — | — |
| 1986 | 32° | 0° | 16° | — | — |
| 1985 | 37° | 0° | 19° | — | — |
| 1984 | 34° | -1° | 17° | 0.15" | 1" |
| 1983 | 33° | 7° | 20° | 0.03" | 0.1" |
| 1982 | 43° | 3° | 23° | — | — |
| 1981 | 56° | 11° | 33° | — | — |
| 1980 | 35° | 7° | 21° | — | — |
| 1979 | 42° | -2° | 20° | — | — |
| 1978 | 25° | -2° | 11° | — | — |
| 1977 | 27° | -3° | 12° | — | — |
| 1976 | 29° | -12° | 9° | — | — |
| 1975 | 30° | -8° | 11° | — | — |
| 1974 | 33° | -3° | 15° | — | — |
| 1973 | 34° | -9° | 12° | — | — |
| 1972 | 34° | -4° | 15° | — | — |
| 1971 | 25° | -16° | 4° | — | — |
Alamosa, CO Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Alamosa, CO Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Alamosa, 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 Alamosa, CO
Alamosa, CO has no months that meet our "pleasant" threshold — every season has tradeoffs.