Rock County Weather in December
Average highs run from 39°F on December 1 to 32°F on December 31, and lows from 17°F to 11°F. Normal precipitation for the month is 0.86 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
- 34°F
- Average low
- 14°F
- Precipitation
- 0.86 in
- Snowfall
- 7.0 in
- Record high
- 78°FDec 11, 1939
- Record low
- -30°FDec 22, 1989
- Chance of a freeze
- 100%
- Daylight
- 9 h 18 min to 9 h 08 min
- Cloud cover
- 60%
- Humidity
- 75%
- Dew point
- 19°F
- Wind
- 12.3 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 | 39°F | 17°F | 69°F 1998 | -9°F 1985 | 16% | 13% |
| Dec 2 | 38°F | 17°F | 72°F 1998 | -14°F 1919 | 16% | 13% |
| Dec 3 | 38°F | 17°F | 68°F 1948 | -9°F 1919 | 16% | 13% |
| Dec 4 | 38°F | 16°F | 70°F 1915 | -11°F 1964 | 16% | 13% |
| Dec 5 | 37°F | 16°F | 70°F 1907 | -9°F 2013 | 16% | 13% |
| Dec 6 | 37°F | 16°F | 75°F 1939 | -17°F 2013 | 16% | 13% |
| Dec 7 | 36°F | 16°F | 71°F 2023 | -17°F 2013 | 16% | 13% |
| Dec 8 | 36°F | 15°F | 65°F 1939 | -20°F 1927 | 16% | 13% |
| Dec 9 | 36°F | 15°F | 67°F 1957 | -21°F 1919 | 16% | 13% |
| Dec 10 | 35°F | 15°F | 66°F 1990 | -21°F 1919 | 16% | 14% |
| Dec 11 | 35°F | 15°F | 78°F 1939 | -15°F 1914 | 16% | 14% |
| Dec 12 | 35°F | 14°F | 64°F 1921 | -19°F 1932 | 16% | 14% |
| Dec 13 | 35°F | 14°F | 72°F 1921 | -19°F 1919 | 16% | 14% |
| Dec 14 | 34°F | 14°F | 65°F 1998 | -17°F 1989 | 16% | 14% |
| Dec 15 | 34°F | 14°F | 65°F 1977 | -22°F 1989 | 16% | 14% |
| Dec 16 | 34°F | 13°F | 65°F 1962 | -20°F 1914 | 16% | 14% |
| Dec 17 | 34°F | 13°F | 69°F 1939 | -18°F 1924 | 16% | 14% |
| Dec 18 | 33°F | 13°F | 64°F 1943 | -20°F 1924 | 16% | 14% |
| Dec 19 | 33°F | 13°F | 65°F 1923 | -19°F 1924 | 16% | 14% |
| Dec 20 | 33°F | 13°F | 70°F 1941 | -19°F 1924 | 16% | 14% |
| Dec 21 | 33°F | 13°F | 63°F 1982 | -28°F 1983 | 16% | 14% |
| Dec 22 | 33°F | 12°F | 78°F 2025 | -30°F 1989 | 16% | 15% |
| Dec 23 | 33°F | 12°F | 69°F 1964 | -28°F 1983 | 16% | 15% |
| Dec 24 | 32°F | 12°F | 68°F 2025 | -24°F 1983 | 16% | 15% |
| Dec 25 | 32°F | 12°F | 65°F 1923 | -21°F 1920 | 16% | 15% |
| Dec 26 | 32°F | 12°F | 64°F 2025 | -15°F 1996 | 16% | 15% |
| Dec 27 | 32°F | 12°F | 68°F 1928 | -18°F 1924 | 16% | 15% |
| Dec 28 | 32°F | 12°F | 63°F 1929 | -18°F 1924 | 16% | 15% |
| Dec 29 | 32°F | 11°F | 61°F 1999 | -20°F 1990 | 16% | 15% |
| Dec 30 | 32°F | 11°F | 64°F 1933 | -23°F 1990 | 16% | 15% |
| Dec 31 | 32°F | 11°F | 57°F 1963 | -21°F 1967 | 16% | 15% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 7:48 AM, sunset 5:06 PM
- December 31
- sunrise 8:07 AM, sunset 5:15 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00255925 (Newport), public domain. Records: NOAA GHCN-Daily, station USC00250050, 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.