Johnson County Weather in December
Average highs run from 53°F on December 1 to 46°F on December 31, and lows from 28°F to 24°F. Normal precipitation for the month is 3.89 in over about 9 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
- 26°F
- Precipitation
- 3.89 in
- Snowfall
- 2.0 in
- Record high
- 80°FDec 22, 1895
- Record low
- -12°FDec 21, 1901
- Chance of a freeze
- 100%
- Daylight
- 9 h 51 min to 9 h 43 min
- Cloud cover
- 67%
- Humidity
- 83%
- Dew point
- 29°F
- Wind
- 6.3 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 | 53°F | 28°F | 76°F 1991 | 6°F 1903 | 26% | 2% |
| Dec 2 | 52°F | 28°F | 76°F 1982 | 15°F 1903 | 27% | 2% |
| Dec 3 | 52°F | 28°F | 75°F 1941 | 11°F 1944 | 27% | 2% |
| Dec 4 | 52°F | 28°F | 75°F 1982 | 12°F 1989 | 27% | 2% |
| Dec 5 | 51°F | 28°F | 75°F 1909 | 12°F 1989 | 27% | 2% |
| Dec 6 | 51°F | 28°F | 74°F 1998 | 9°F 1895 | 27% | 2% |
| Dec 7 | 51°F | 28°F | 75°F 2004 | 10°F 1984 | 27% | 2% |
| Dec 8 | 51°F | 27°F | 70°F 1998 | 11°F 2006 | 27% | 2% |
| Dec 9 | 50°F | 27°F | 72°F 2012 | 6°F 1995 | 28% | 2% |
| Dec 10 | 50°F | 27°F | 68°F 1897 | 11°F 1898 | 28% | 2% |
| Dec 11 | 50°F | 27°F | 73°F 2007 | 12°F 1898 | 28% | 3% |
| Dec 12 | 50°F | 27°F | 75°F 2021 | 10°F 1988 | 28% | 3% |
| Dec 13 | 49°F | 27°F | 73°F 1940 | 8°F 1982 | 28% | 3% |
| Dec 14 | 49°F | 27°F | 73°F 2001 | 3°F 2010 | 28% | 3% |
| Dec 15 | 49°F | 27°F | 71°F 1984 | 3°F 2010 | 29% | 3% |
| Dec 16 | 49°F | 26°F | 72°F 2021 | 0°F 1989 | 29% | 3% |
| Dec 17 | 48°F | 26°F | 72°F 2021 | 0°F 1989 | 29% | 3% |
| Dec 18 | 48°F | 26°F | 73°F 1895 | 4°F 1989 | 29% | 3% |
| Dec 19 | 48°F | 26°F | 72°F 1990 | 5°F 2004 | 29% | 3% |
| Dec 20 | 48°F | 26°F | 65°F 1987 | -6°F 1901 | 29% | 3% |
| Dec 21 | 48°F | 26°F | 73°F 2013 | -12°F 1901 | 29% | 3% |
| Dec 22 | 48°F | 26°F | 80°F 1895 | -1°F 1989 | 30% | 3% |
| Dec 23 | 47°F | 25°F | 79°F 1895 | -8°F 1989 | 30% | 3% |
| Dec 24 | 47°F | 25°F | 75°F 1895 | -9°F 1989 | 30% | 3% |
| Dec 25 | 47°F | 25°F | 76°F 1895 | -9°F 1989 | 30% | 3% |
| Dec 26 | 47°F | 25°F | 75°F 1942 | 0°F 1983 | 30% | 3% |
| Dec 27 | 47°F | 25°F | 69°F 1942 | 7°F 2010 | 30% | 3% |
| Dec 28 | 47°F | 25°F | 71°F 1982 | 7°F 2010 | 30% | 3% |
| Dec 29 | 46°F | 25°F | 75°F 2021 | 7°F 1899 | 30% | 4% |
| Dec 30 | 46°F | 24°F | 72°F 2019 | 0°F 1899 | 30% | 4% |
| Dec 31 | 46°F | 24°F | 72°F 1990 | -5°F 1899 | 30% | 4% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:21 AM, sunset 5:12 PM
- December 31
- sunrise 7:39 AM, sunset 5:22 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00406292 (Mtn City 2), public domain. Records: NOAA GHCN-Daily, station USC00402806, 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.