Trail Weather in December
Average highs run from 49°F on December 1 to 47°F on December 31, and lows from 32°F to 30°F. Normal precipitation for the month is 6.33 in over about 18 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
- 47°F
- Average low
- 31°F
- Precipitation
- 6.33 in
- Snowfall
- 1.1 in
- Record high
- 72°FDec 14, 1962
- Record low
- -6°FDec 8, 1972
- Chance of a freeze
- 100%
- Daylight
- 9 h 17 min to 9 h 07 min
- Cloud cover
- 70%
- Humidity
- 91%
- Dew point
- 35°F
- Wind
- 4.5 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 | 49°F | 32°F | 60°F 1941 | 15°F 1936 | 57% | 1% |
| Dec 2 | 49°F | 32°F | 65°F 1958 | 19°F 1969 | 58% | 1% |
| Dec 3 | 49°F | 32°F | 68°F 1979 | 18°F 1936 | 58% | 1% |
| Dec 4 | 48°F | 32°F | 62°F 1949 | 18°F 2013 | 58% | 1% |
| Dec 5 | 48°F | 32°F | 63°F 1989 | 14°F 2013 | 58% | 1% |
| Dec 6 | 48°F | 32°F | 64°F 2017 | 18°F 1929 | 58% | 1% |
| Dec 7 | 48°F | 32°F | 63°F 1934 | 1°F 1972 | 58% | 1% |
| Dec 8 | 47°F | 31°F | 64°F 2006 | -6°F 1972 | 58% | 1% |
| Dec 9 | 47°F | 31°F | 66°F 1987 | -6°F 1972 | 58% | 1% |
| Dec 10 | 47°F | 31°F | 69°F 1993 | -6°F 1972 | 58% | 1% |
| Dec 11 | 47°F | 31°F | 67°F 1995 | -3°F 1972 | 58% | 1% |
| Dec 12 | 47°F | 31°F | 62°F 1944 | 8°F 1932 | 58% | 1% |
| Dec 13 | 47°F | 31°F | 71°F 1929 | 9°F 1972 | 58% | 1% |
| Dec 14 | 47°F | 31°F | 72°F 1962 | 13°F 1932 | 58% | 1% |
| Dec 15 | 47°F | 31°F | 64°F 1941 | 13°F 1932 | 58% | 1% |
| Dec 16 | 46°F | 31°F | 62°F 1988 | 14°F 1965 | 57% | 2% |
| Dec 17 | 46°F | 31°F | 62°F 1994 | 13°F 1965 | 57% | 2% |
| Dec 18 | 46°F | 31°F | 64°F 1931 | 15°F 1965 | 57% | 2% |
| Dec 19 | 46°F | 31°F | 65°F 1953 | 13°F 1965 | 57% | 2% |
| Dec 20 | 46°F | 30°F | 63°F 2019 | 8°F 1990 | 57% | 2% |
| Dec 21 | 46°F | 30°F | 65°F 2014 | -4°F 1990 | 57% | 2% |
| Dec 22 | 46°F | 30°F | 66°F 1964 | 0°F 1990 | 57% | 2% |
| Dec 23 | 46°F | 30°F | 62°F 1964 | 7°F 1990 | 56% | 2% |
| Dec 24 | 46°F | 30°F | 61°F 1964 | 10°F 1990 | 56% | 2% |
| Dec 25 | 46°F | 30°F | 60°F 1964 | 13°F 1990 | 56% | 2% |
| Dec 26 | 46°F | 30°F | 62°F 2022 | 17°F 1962 | 56% | 2% |
| Dec 27 | 46°F | 30°F | 63°F 1991 | 16°F 1954 | 56% | 2% |
| Dec 28 | 46°F | 30°F | 63°F 2011 | 16°F 1930 | 56% | 2% |
| Dec 29 | 46°F | 30°F | 68°F 2023 | 14°F 1978 | 56% | 2% |
| Dec 30 | 47°F | 30°F | 59°F 1979 | 10°F 1978 | 56% | 2% |
| Dec 31 | 47°F | 30°F | 62°F 1939 | 15°F 1990 | 56% | 2% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:22 AM, sunset 4:39 PM
- December 31
- sunrise 7:41 AM, sunset 4:48 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00355055 (Lost Creek Dam), public domain. Records: NOAA GHCN-Daily, station USW00024225, 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.