Drain Weather in December
Average highs run from 51°F on December 1 to 49°F on December 31, and lows from 37°F to 34°F. Normal precipitation for the month is 8.54 in over about 20 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
- 49°F
- Average low
- 35°F
- Precipitation
- 8.54 in
- Record high
- 73°FDec 17, 1926
- Record low
- -4°FDec 10, 1972
- Chance of a freeze
- 98%
- Daylight
- 9 h 11 min to 8 h 59 min
- Cloud cover
- 77%
- Humidity
- 94%
- Dew point
- 39°F
- Wind
- 5.1 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 | 51°F | 37°F | 68°F 1926 | 19°F 1985 | 67% | 1% |
| Dec 2 | 50°F | 36°F | 69°F 1958 | 19°F 1985 | 67% | 1% |
| Dec 3 | 50°F | 36°F | 66°F 1958 | 20°F 2013 | 67% | 1% |
| Dec 4 | 50°F | 36°F | 67°F 1989 | 18°F 2013 | 67% | 1% |
| Dec 5 | 50°F | 36°F | 64°F 1970 | 21°F 2013 | 67% | 1% |
| Dec 6 | 50°F | 36°F | 66°F 2023 | 18°F 2013 | 67% | 1% |
| Dec 7 | 49°F | 36°F | 65°F 1938 | 2°F 2013 | 67% | 1% |
| Dec 8 | 49°F | 36°F | 65°F 2014 | 3°F 2013 | 67% | 1% |
| Dec 9 | 49°F | 35°F | 66°F 2014 | -1°F 1972 | 66% | 1% |
| Dec 10 | 49°F | 35°F | 69°F 2014 | -4°F 1972 | 66% | 1% |
| Dec 11 | 49°F | 35°F | 66°F 1955 | 0°F 1972 | 66% | 1% |
| Dec 12 | 49°F | 35°F | 63°F 1921 | 0°F 1919 | 66% | 1% |
| Dec 13 | 49°F | 35°F | 67°F 1921 | -4°F 1919 | 66% | 1% |
| Dec 14 | 49°F | 35°F | 64°F 2002 | 0°F 1919 | 66% | 1% |
| Dec 15 | 48°F | 35°F | 65°F 1962 | 9°F 1932 | 66% | 1% |
| Dec 16 | 48°F | 35°F | 64°F 1941 | 11°F 2008 | 66% | 1% |
| Dec 17 | 48°F | 35°F | 73°F 1926 | 7°F 1924 | 66% | 1% |
| Dec 18 | 48°F | 35°F | 64°F 1931 | 3°F 1924 | 65% | 1% |
| Dec 19 | 48°F | 34°F | 63°F 1940 | 1°F 1924 | 65% | 1% |
| Dec 20 | 48°F | 34°F | 63°F 1940 | 7°F 1924 | 65% | 1% |
| Dec 21 | 48°F | 34°F | 66°F 1940 | 1°F 1990 | 65% | 1% |
| Dec 22 | 48°F | 34°F | 65°F 1940 | 3°F 1990 | 65% | 1% |
| Dec 23 | 48°F | 34°F | 65°F 1950 | -3°F 1924 | 65% | 1% |
| Dec 24 | 48°F | 34°F | 61°F 1922 | 7°F 1990 | 65% | 1% |
| Dec 25 | 48°F | 34°F | 64°F 1980 | -3°F 1924 | 65% | 1% |
| Dec 26 | 48°F | 34°F | 64°F 1950 | 1°F 1924 | 65% | 1% |
| Dec 27 | 48°F | 34°F | 62°F 1961 | 14°F 1985 | 65% | 1% |
| Dec 28 | 48°F | 34°F | 67°F 1917 | 16°F 1985 | 65% | 1% |
| Dec 29 | 48°F | 34°F | 62°F 1917 | 10°F 1990 | 65% | 1% |
| Dec 30 | 49°F | 34°F | 68°F 1980 | 8°F 1978 | 65% | 1% |
| Dec 31 | 49°F | 34°F | 60°F 1939 | 16°F 1968 | 65% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:27 AM, sunset 4:38 PM
- December 31
- sunrise 7:47 AM, sunset 4:46 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00352406 (Drain), public domain. Records: NOAA GHCN-Daily, station USC00351897, 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.