Lyons Weather in December
Average highs run from 43°F on December 1 to 42°F on December 31, and lows from 34°F to 32°F. Normal precipitation for the month is 11.21 in.
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
- 42°F
- Average low
- 33°F
- Precipitation
- 11.21 in
- Snowfall
- 3.5 in
- Record high
- 72°FDec 9, 1929
- Record low
- -12°FDec 8, 1972
- Chance of a freeze
- 100%
- Daylight
- 9 h 03 min to 8 h 51 min
- Cloud cover
- 78%
- Humidity
- 92%
- Dew point
- 35°F
- Wind
- 6.0 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 | 43°F | 34°F | 65°F 2021 | 19°F 1931 | 3% | |
| Dec 2 | 43°F | 34°F | 64°F 1958 | 18°F 1969 | 3% | |
| Dec 3 | 43°F | 34°F | 63°F 1896 | 21°F 1969 | 3% | |
| Dec 4 | 43°F | 33°F | 63°F 1945 | 18°F 1972 | 3% | |
| Dec 5 | 42°F | 33°F | 63°F 2023 | 17°F 2013 | 4% | |
| Dec 6 | 42°F | 33°F | 60°F 1965 | 18°F 1956 | 4% | |
| Dec 7 | 42°F | 33°F | 61°F 1938 | -4°F 1972 | 4% | |
| Dec 8 | 42°F | 33°F | 68°F 1929 | -12°F 1972 | 4% | |
| Dec 9 | 42°F | 33°F | 72°F 1929 | -5°F 1972 | 4% | |
| Dec 10 | 42°F | 33°F | 70°F 1929 | -2°F 1972 | 5% | |
| Dec 11 | 42°F | 33°F | 71°F 1929 | -3°F 1972 | 5% | |
| Dec 12 | 42°F | 33°F | 65°F 1895 | 5°F 1932 | 5% | |
| Dec 13 | 41°F | 33°F | 61°F 1969 | -2°F 1919 | 5% | |
| Dec 14 | 41°F | 32°F | 60°F 2002 | -6°F 1919 | 5% | |
| Dec 15 | 41°F | 32°F | 60°F 1976 | 10°F 1919 | 5% | |
| Dec 16 | 41°F | 32°F | 61°F 2025 | 10°F 1932 | 6% | |
| Dec 17 | 41°F | 32°F | 61°F 1979 | 9°F 1964 | 6% | |
| Dec 18 | 41°F | 32°F | 62°F 2024 | 6°F 1924 | 6% | |
| Dec 19 | 41°F | 32°F | 62°F 1994 | 11°F 1924 | 6% | |
| Dec 20 | 41°F | 32°F | 63°F 1994 | 9°F 1990 | 6% | |
| Dec 21 | 41°F | 32°F | 62°F 1955 | 8°F 1990 | 6% | |
| Dec 22 | 41°F | 32°F | 61°F 1964 | 7°F 1990 | 6% | |
| Dec 23 | 41°F | 32°F | 64°F 1925 | 11°F 1983 | 7% | |
| Dec 24 | 41°F | 32°F | 60°F 2005 | 10°F 1990 | 7% | |
| Dec 25 | 41°F | 32°F | 62°F 1980 | 5°F 1924 | 7% | |
| Dec 26 | 41°F | 32°F | 60°F 1980 | 5°F 1924 | 7% | |
| Dec 27 | 41°F | 32°F | 61°F 1980 | 17°F 1985 | 7% | |
| Dec 28 | 41°F | 32°F | 62°F 1917 | 15°F 1985 | 7% | |
| Dec 29 | 41°F | 32°F | 60°F 1917 | 14°F 1978 | 7% | |
| Dec 30 | 41°F | 32°F | 66°F 1980 | 9°F 1968 | 7% | |
| Dec 31 | 42°F | 32°F | 65°F 1996 | 8°F 1968 | 7% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 7:28 AM, sunset 4:31 PM
- December 31
- sunrise 7:48 AM, sunset 4:39 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00357809 (Silver Creek Falls), public domain. Records: NOAA GHCN-Daily, station USW00024232, 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.