Alamo Weather in December
Average highs run from 45°F on December 1 to 42°F on December 31, and lows from 22°F to 19°F. Normal precipitation for the month is 0.98 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
- 43°F
- Average low
- 20°F
- Precipitation
- 0.98 in
- Snowfall
- 9.9 in
- Record high
- 74°FDec 14, 1995
- Record low
- -5°FDec 24, 1990
- Chance of a freeze
- 100%
- Daylight
- 10 h 02 min to 9 h 54 min
- Cloud cover
- 45%
- Humidity
- 56%
- Dew point
- 18°F
- Wind
- 10.1 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 | 45°F | 22°F | 69°F 1995 | 3°F 1976 | 16% | 11% |
| Dec 2 | 45°F | 22°F | 72°F 2012 | 7°F 1976 | 16% | 11% |
| Dec 3 | 45°F | 22°F | 73°F 1995 | 8°F 1976 | 16% | 11% |
| Dec 4 | 44°F | 22°F | 72°F 1958 | 7°F 2009 | 16% | 11% |
| Dec 5 | 44°F | 21°F | 72°F 1995 | 7°F 2009 | 16% | 12% |
| Dec 6 | 44°F | 21°F | 70°F 1966 | -1°F 2011 | 16% | 12% |
| Dec 7 | 44°F | 21°F | 72°F 1995 | 0°F 2011 | 16% | 12% |
| Dec 8 | 43°F | 21°F | 71°F 1995 | 5°F 2005 | 16% | 12% |
| Dec 9 | 43°F | 21°F | 65°F 2012 | 1°F 1978 | 16% | 12% |
| Dec 10 | 43°F | 20°F | 66°F 2021 | 7°F 2017 | 16% | 12% |
| Dec 11 | 43°F | 20°F | 72°F 1987 | 5°F 2012 | 16% | 13% |
| Dec 12 | 43°F | 20°F | 70°F 1987 | 2°F 1989 | 16% | 13% |
| Dec 13 | 42°F | 20°F | 73°F 2016 | 5°F 1997 | 16% | 13% |
| Dec 14 | 42°F | 20°F | 74°F 1995 | 6°F 1963 | 16% | 13% |
| Dec 15 | 42°F | 20°F | 68°F 1977 | 4°F 1964 | 16% | 13% |
| Dec 16 | 42°F | 20°F | 70°F 2010 | 3°F 1971 | 16% | 13% |
| Dec 17 | 42°F | 20°F | 65°F 2016 | 3°F 1971 | 16% | 13% |
| Dec 18 | 42°F | 20°F | 68°F 1980 | 3°F 1996 | 16% | 14% |
| Dec 19 | 42°F | 19°F | 66°F 1998 | 3°F 2021 | 16% | 14% |
| Dec 20 | 42°F | 19°F | 69°F 1981 | 3°F 1996 | 16% | 14% |
| Dec 21 | 42°F | 19°F | 71°F 2025 | 5°F 1973 | 17% | 14% |
| Dec 22 | 42°F | 19°F | 72°F 2025 | 6°F 1973 | 17% | 14% |
| Dec 23 | 42°F | 19°F | 70°F 2025 | -3°F 1990 | 17% | 14% |
| Dec 24 | 42°F | 19°F | 69°F 1964 | -5°F 1990 | 17% | 15% |
| Dec 25 | 42°F | 19°F | 66°F 2025 | -5°F 1990 | 17% | 15% |
| Dec 26 | 42°F | 19°F | 70°F 2017 | 3°F 1990 | 17% | 15% |
| Dec 27 | 42°F | 19°F | 67°F 2021 | 2°F 1973 | 17% | 15% |
| Dec 28 | 42°F | 19°F | 66°F 1980 | 2°F 1974 | 17% | 15% |
| Dec 29 | 42°F | 19°F | 66°F 1973 | 2°F 1966 | 17% | 15% |
| Dec 30 | 42°F | 19°F | 68°F 2005 | 0°F 2018 | 17% | 15% |
| Dec 31 | 42°F | 19°F | 68°F 1985 | 0°F 2018 | 17% | 15% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 6:58 AM, sunset 5:00 PM
- December 31
- sunrise 7:16 AM, sunset 5:10 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00296812 (Pietown 19NE), public domain. Records: NOAA GHCN-Daily, station USC00295150, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.