Alamosa Weather in December
Average highs run from 43°F on December 1 to 34°F on December 31, and lows from 6°F to -1°F. Normal precipitation for the month is 0.23 in over about 5 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 37°F
- Average low
- 2°F
- Precipitation
- 0.23 in
- Snowfall
- 4.2 in
- Record high
- 63°FDec 19, 2025
- Record low
- -42°FDec 8, 1978
- Chance of a freeze
- 100%
- Daylight
- 9 h 47 min to 9 h 37 min
- Cloud cover
- 55%
- Humidity
- 72%
- Dew point
- 12°F
- Wind
- 8.9 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Dec 1 | 43°F | 6°F | 61°F 2021 | -17°F 1987 | 14% | 12% |
| Dec 2 | 42°F | 6°F | 61°F 2021 | -14°F 1957 | 14% | 12% |
| Dec 3 | 42°F | 6°F | 62°F 2010 | -19°F 1991 | 14% | 12% |
| Dec 4 | 41°F | 5°F | 59°F 1995 | -17°F 1952 | 14% | 13% |
| Dec 5 | 41°F | 5°F | 59°F 1958 | -26°F 1964 | 14% | 13% |
| Dec 6 | 40°F | 4°F | 58°F 1958 | -31°F 1964 | 15% | 13% |
| Dec 7 | 40°F | 4°F | 59°F 1977 | -35°F 1964 | 15% | 14% |
| Dec 8 | 40°F | 4°F | 61°F 1958 | -42°F 1978 | 15% | 14% |
| Dec 9 | 39°F | 3°F | 54°F 1970 | -39°F 1978 | 15% | 14% |
| Dec 10 | 39°F | 3°F | 56°F 2015 | -24°F 1978 | 15% | 15% |
| Dec 11 | 38°F | 3°F | 55°F 1950 | -28°F 1961 | 15% | 15% |
| Dec 12 | 38°F | 2°F | 56°F 1948 | -41°F 1961 | 15% | 15% |
| Dec 13 | 38°F | 2°F | 56°F 1948 | -38°F 1961 | 16% | 15% |
| Dec 14 | 37°F | 2°F | 55°F 2016 | -42°F 1964 | 16% | 16% |
| Dec 15 | 37°F | 1°F | 60°F 2016 | -32°F 1964 | 16% | 16% |
| Dec 16 | 37°F | 1°F | 55°F 1980 | -25°F 1991 | 16% | 16% |
| Dec 17 | 36°F | 1°F | 55°F 1980 | -20°F 1967 | 16% | 16% |
| Dec 18 | 36°F | 1°F | 53°F 1980 | -25°F 1964 | 16% | 16% |
| Dec 19 | 36°F | 0°F | 63°F 2025 | -29°F 1968 | 16% | 16% |
| Dec 20 | 36°F | 0°F | 59°F 2025 | -27°F 1992 | 16% | 16% |
| Dec 21 | 35°F | 0°F | 58°F 2025 | -28°F 1967 | 15% | 16% |
| Dec 22 | 35°F | 0°F | 57°F 2025 | -30°F 1967 | 15% | 16% |
| Dec 23 | 35°F | 0°F | 58°F 1955 | -29°F 1990 | 15% | 16% |
| Dec 24 | 35°F | -1°F | 60°F 2025 | -33°F 1990 | 15% | 16% |
| Dec 25 | 35°F | -1°F | 61°F 2025 | -27°F 1974 | 15% | 16% |
| Dec 26 | 35°F | -1°F | 58°F 2005 | -23°F 1990 | 15% | 16% |
| Dec 27 | 35°F | -1°F | 58°F 1980 | -23°F 1990 | 15% | 16% |
| Dec 28 | 34°F | -1°F | 51°F 1980 | -29°F 2007 | 15% | 16% |
| Dec 29 | 34°F | -1°F | 57°F 2024 | -33°F 2007 | 15% | 16% |
| Dec 30 | 34°F | -1°F | 63°F 2017 | -28°F 2007 | 15% | 16% |
| Dec 31 | 34°F | -1°F | 55°F 1980 | -30°F 1974 | 15% | 16% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 6:59 AM, sunset 4:46 PM
- December 31
- sunrise 7:18 AM, sunset 4:55 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00050128 (Alamosa 1E), public domain. Records: NOAA GHCN-Daily, station USW00023061, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.