Alamo Weather in December
Average highs run from 57°F on December 1 to 52°F on December 31, and lows from 29°F to 27°F. Normal precipitation for the month is 0.64 in over about 2 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
- 53°F
- Average low
- 27°F
- Precipitation
- 0.64 in
- Snowfall
- 0.8 in
- Record high
- 69°FDec 7, 1989
- Record low
- -18°FDec 22, 1990
- Chance of a freeze
- 100%
- Daylight
- 9 h 47 min to 9 h 38 min
- Cloud cover
- 47%
- Humidity
- 56%
- Dew point
- 19°F
- Wind
- 7.8 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 | 57°F | 29°F | 65°F 1995 | 9°F 1991 | 6% | 0% |
| Dec 2 | 57°F | 28°F | 65°F 2008 | 7°F 1982 | 6% | 1% |
| Dec 3 | 56°F | 28°F | 64°F 2008 | 8°F 2004 | 6% | 1% |
| Dec 4 | 56°F | 28°F | 60°F 1987 | 8°F 2011 | 6% | 1% |
| Dec 5 | 56°F | 28°F | 66°F 1989 | 5°F 1983 | 6% | 1% |
| Dec 6 | 55°F | 27°F | 68°F 1989 | 3°F 1992 | 6% | 1% |
| Dec 7 | 55°F | 27°F | 69°F 1989 | 3°F 1998 | 6% | 1% |
| Dec 8 | 55°F | 27°F | 62°F 1988 | 0°F 2013 | 6% | 1% |
| Dec 9 | 54°F | 27°F | 60°F 1989 | 1°F 2009 | 6% | 1% |
| Dec 10 | 54°F | 27°F | 64°F 2015 | 2°F 2009 | 6% | 1% |
| Dec 11 | 54°F | 27°F | 67°F 1987 | -3°F 1949 | 6% | 1% |
| Dec 12 | 53°F | 27°F | 63°F 1987 | -7°F 1949 | 6% | 1% |
| Dec 13 | 53°F | 26°F | 60°F 1988 | 4°F 1987 | 6% | 1% |
| Dec 14 | 53°F | 26°F | 68°F 2010 | 2°F 1949 | 6% | 1% |
| Dec 15 | 53°F | 26°F | 59°F 2010 | 3°F 1949 | 6% | 1% |
| Dec 16 | 52°F | 26°F | 59°F 2006 | -1°F 1987 | 6% | 1% |
| Dec 17 | 52°F | 26°F | 58°F 1980 | 0°F 1984 | 7% | 1% |
| Dec 18 | 52°F | 26°F | 63°F 2025 | -1°F 1984 | 7% | 1% |
| Dec 19 | 52°F | 26°F | 58°F 2025 | -9°F 1992 | 7% | 1% |
| Dec 20 | 52°F | 26°F | 63°F 2025 | -10°F 1992 | 7% | 1% |
| Dec 21 | 52°F | 26°F | 61°F 1981 | -12°F 1990 | 7% | 1% |
| Dec 22 | 52°F | 26°F | 62°F 2005 | -18°F 1990 | 7% | 1% |
| Dec 23 | 52°F | 26°F | 59°F 2025 | -11°F 1990 | 7% | 1% |
| Dec 24 | 52°F | 26°F | 60°F 1989 | -10°F 1990 | 7% | 1% |
| Dec 25 | 52°F | 26°F | 59°F 1980 | -8°F 1987 | 7% | 1% |
| Dec 26 | 52°F | 27°F | 59°F 2005 | -5°F 1995 | 7% | 1% |
| Dec 27 | 52°F | 27°F | 58°F 2024 | -5°F 1988 | 7% | 1% |
| Dec 28 | 52°F | 27°F | 63°F 1980 | -9°F 1988 | 7% | 1% |
| Dec 29 | 52°F | 27°F | 59°F 1998 | -9°F 1988 | 7% | 1% |
| Dec 30 | 52°F | 27°F | 61°F 2017 | 1°F 1990 | 7% | 1% |
| Dec 31 | 52°F | 27°F | 63°F 2011 | -5°F 1987 | 7% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 6:36 AM, sunset 4:23 PM
- December 31
- sunrise 6:55 AM, sunset 4:33 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00265880 (Pahranagat Wr), public domain. Records: NOAA GHCN-Daily, station USC00265400, 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.