Lyon County Weather in December
Average highs run from 48°F on December 1 to 44°F on December 31, and lows from 23°F to 22°F. Normal precipitation for the month is 0.42 in over about 3 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
- 44°F
- Average low
- 22°F
- Precipitation
- 0.42 in
- Snowfall
- 0.9 in
- Record high
- 73°FDec 4, 2007
- Record low
- -22°FDec 21, 1990
- Chance of a freeze
- 100%
- Daylight
- 9 h 38 min to 9 h 28 min
- Cloud cover
- 60%
- Humidity
- 61%
- Dew point
- 20°F
- Wind
- 5.6 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 | 48°F | 23°F | 70°F 2008 | 5°F 1986 | 9% | 1% |
| Dec 2 | 47°F | 23°F | 67°F 2008 | 4°F 1973 | 9% | 1% |
| Dec 3 | 47°F | 23°F | 71°F 1940 | 0°F 2004 | 9% | 1% |
| Dec 4 | 47°F | 23°F | 73°F 2007 | -1°F 2004 | 9% | 1% |
| Dec 5 | 46°F | 23°F | 72°F 1958 | -5°F 1972 | 9% | 1% |
| Dec 6 | 46°F | 22°F | 70°F 1958 | -3°F 1972 | 9% | 2% |
| Dec 7 | 45°F | 22°F | 71°F 1958 | 3°F 1959 | 9% | 2% |
| Dec 8 | 45°F | 22°F | 68°F 1958 | -11°F 2009 | 9% | 2% |
| Dec 9 | 45°F | 22°F | 66°F 2025 | -18°F 2009 | 9% | 2% |
| Dec 10 | 45°F | 22°F | 67°F 1990 | -7°F 2013 | 9% | 2% |
| Dec 11 | 44°F | 22°F | 65°F 2010 | -11°F 1972 | 9% | 2% |
| Dec 12 | 44°F | 22°F | 65°F 1921 | -9°F 1972 | 9% | 2% |
| Dec 13 | 44°F | 22°F | 67°F 1969 | -12°F 1932 | 9% | 2% |
| Dec 14 | 44°F | 22°F | 69°F 1946 | -11°F 1932 | 10% | 2% |
| Dec 15 | 44°F | 21°F | 68°F 2006 | -14°F 1931 | 10% | 2% |
| Dec 16 | 43°F | 21°F | 65°F 1946 | -13°F 1931 | 10% | 2% |
| Dec 17 | 43°F | 21°F | 65°F 2025 | -3°F 1908 | 10% | 2% |
| Dec 18 | 43°F | 21°F | 68°F 2025 | -12°F 1908 | 10% | 2% |
| Dec 19 | 43°F | 21°F | 67°F 2025 | -17°F 1908 | 10% | 2% |
| Dec 20 | 43°F | 21°F | 64°F 1917 | -14°F 1908 | 10% | 2% |
| Dec 21 | 43°F | 21°F | 66°F 2000 | -22°F 1990 | 10% | 2% |
| Dec 22 | 43°F | 21°F | 67°F 2005 | -21°F 1990 | 10% | 2% |
| Dec 23 | 43°F | 21°F | 66°F 1964 | -21°F 1990 | 10% | 2% |
| Dec 24 | 43°F | 21°F | 64°F 2005 | -10°F 1914 | 10% | 2% |
| Dec 25 | 43°F | 21°F | 62°F 1929 | -6°F 1990 | 10% | 2% |
| Dec 26 | 43°F | 21°F | 64°F 1922 | -7°F 1990 | 10% | 2% |
| Dec 27 | 43°F | 21°F | 62°F 1917 | -14°F 1988 | 10% | 2% |
| Dec 28 | 43°F | 22°F | 69°F 1998 | -7°F 1948 | 10% | 2% |
| Dec 29 | 43°F | 22°F | 64°F 2011 | -9°F 1948 | 11% | 2% |
| Dec 30 | 43°F | 22°F | 66°F 2017 | -7°F 1971 | 11% | 2% |
| Dec 31 | 44°F | 22°F | 69°F 2017 | -14°F 1987 | 11% | 2% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- December 1
- sunrise 6:57 AM, sunset 4:35 PM
- December 31
- sunrise 7:16 AM, sunset 4:44 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00269229 (Yerington), public domain. Records: NOAA GHCN-Daily, station USC00265191, 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.