San Manuel Weather in December
Average highs run from 62°F on December 1 to 58°F on December 31, and lows from 40°F to 37°F. Normal precipitation for the month is 1.03 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
- 59°F
- Average low
- 38°F
- Precipitation
- 1.03 in
- Snowfall
- 0.1 in
- Record high
- 81°FDec 1, 1973
- Record low
- 15°FDec 22, 1968
- Chance of a freeze
- 89%
- Daylight
- 10 h 09 min to 10 h 03 min
- Cloud cover
- 39%
- Humidity
- 51%
- Dew point
- 26°F
- Wind
- 8.1 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 | 62°F | 40°F | 81°F 1973 | 27°F 1975 | 13% | 0% |
| Dec 2 | 62°F | 40°F | 76°F 1973 | 27°F 1967 | 14% | 0% |
| Dec 3 | 62°F | 40°F | 80°F 1954 | 24°F 1968 | 14% | 0% |
| Dec 4 | 61°F | 40°F | 76°F 1958 | 26°F 1968 | 14% | 0% |
| Dec 5 | 61°F | 39°F | 75°F 1958 | 27°F 1960 | 14% | 0% |
| Dec 6 | 61°F | 39°F | 77°F 1970 | 21°F 1960 | 14% | 0% |
| Dec 7 | 60°F | 39°F | 77°F 1970 | 18°F 1960 | 14% | 0% |
| Dec 8 | 60°F | 39°F | 75°F 1970 | 18°F 1960 | 15% | 0% |
| Dec 9 | 60°F | 39°F | 72°F 1958 | 20°F 1971 | 15% | 0% |
| Dec 10 | 60°F | 39°F | 73°F 1975 | 25°F 1960 | 15% | 0% |
| Dec 11 | 59°F | 38°F | 73°F 1973 | 26°F 1970 | 15% | 0% |
| Dec 12 | 59°F | 38°F | 72°F 1958 | 25°F 1972 | 15% | 0% |
| Dec 13 | 59°F | 38°F | 70°F 1958 | 25°F 1964 | 15% | 0% |
| Dec 14 | 59°F | 38°F | 70°F 1955 | 21°F 1964 | 16% | 0% |
| Dec 15 | 59°F | 38°F | 74°F 1977 | 21°F 1975 | 16% | 0% |
| Dec 16 | 59°F | 38°F | 73°F 2024 | 25°F 2015 | 16% | 0% |
| Dec 17 | 58°F | 38°F | 73°F 1970 | 24°F 1971 | 16% | 0% |
| Dec 18 | 58°F | 38°F | 74°F 2023 | 23°F 1968 | 16% | 0% |
| Dec 19 | 58°F | 38°F | 73°F 1969 | 26°F 1965 | 16% | 0% |
| Dec 20 | 58°F | 38°F | 71°F 2024 | 27°F 1965 | 16% | 0% |
| Dec 21 | 58°F | 38°F | 72°F 1955 | 21°F 1968 | 16% | 0% |
| Dec 22 | 58°F | 38°F | 70°F 1955 | 15°F 1968 | 16% | 1% |
| Dec 23 | 58°F | 37°F | 73°F 1955 | 21°F 1968 | 16% | 1% |
| Dec 24 | 58°F | 37°F | 74°F 1955 | 16°F 1974 | 16% | 1% |
| Dec 25 | 58°F | 37°F | 72°F 1955 | 25°F 1974 | 16% | 1% |
| Dec 26 | 58°F | 37°F | 73°F 1969 | 24°F 1974 | 16% | 1% |
| Dec 27 | 58°F | 37°F | 71°F 1955 | 25°F 1974 | 16% | 1% |
| Dec 28 | 58°F | 37°F | 70°F 1955 | 22°F 1966 | 16% | 1% |
| Dec 29 | 58°F | 37°F | 72°F 1955 | 19°F 1966 | 16% | 1% |
| Dec 30 | 58°F | 37°F | 71°F 2017 | 22°F 1966 | 16% | 1% |
| Dec 31 | 58°F | 37°F | 70°F 1955 | 20°F 1958 | 16% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:07 AM, sunset 5:16 PM
- December 31
- sunrise 7:24 AM, sunset 5:27 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00027530 (San Manuel), public domain. Records: NOAA GHCN-Daily, station USC00027530, 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.