Sumter County Weather in December
Average highs run from 62°F on December 1 to 57°F on December 31, and lows from 36°F to 34°F.
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
- 59°F
- Average low
- 35°F
- Record high
- 82°FDec 2, 1991
- Record low
- 4°FDec 24, 1989
- Chance of a freeze
- 100%
- Daylight
- 10 h 10 min to 10 h 02 min
- Cloud cover
- 61%
- Humidity
- 84%
- Dew point
- 42°F
- Wind
- 4.7 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 62°F | 36°F | 80°F 1991 | 17°F 1976 | |
| Dec 2 | 62°F | 36°F | 82°F 1991 | 20°F 1965 | |
| Dec 3 | 62°F | 36°F | 81°F 1982 | 19°F 1960 | |
| Dec 4 | 61°F | 36°F | 82°F 1978 | 21°F 1989 | |
| Dec 5 | 61°F | 36°F | 78°F 2005 | 20°F 1989 | |
| Dec 6 | 61°F | 36°F | 81°F 1998 | 22°F 1974 | |
| Dec 7 | 61°F | 36°F | 82°F 1951 | 13°F 1977 | |
| Dec 8 | 61°F | 35°F | 82°F 1951 | 18°F 1984 | |
| Dec 9 | 60°F | 35°F | 82°F 1978 | 15°F 2011 | |
| Dec 10 | 60°F | 35°F | 81°F 1972 | 13°F 1995 | |
| Dec 11 | 60°F | 35°F | 79°F 1972 | 13°F 1995 | |
| Dec 12 | 60°F | 35°F | 79°F 1985 | 11°F 1962 | |
| Dec 13 | 60°F | 35°F | 79°F 1971 | 5°F 1962 | |
| Dec 14 | 60°F | 35°F | 79°F 1991 | 5°F 1962 | |
| Dec 15 | 59°F | 35°F | 77°F 1975 | 14°F 1985 | |
| Dec 16 | 59°F | 35°F | 77°F 1975 | 13°F 1985 | |
| Dec 17 | 59°F | 35°F | 82°F 1971 | 15°F 1958 | |
| Dec 18 | 59°F | 35°F | 79°F 1990 | 16°F 1960 | |
| Dec 19 | 59°F | 35°F | 78°F 1984 | 15°F 1981 | |
| Dec 20 | 59°F | 35°F | 80°F 1967 | 8°F 1996 | |
| Dec 21 | 59°F | 34°F | 77°F 1951 | 9°F 1996 | |
| Dec 22 | 58°F | 34°F | 78°F 2013 | 13°F 1989 | |
| Dec 23 | 58°F | 34°F | 81°F 1990 | 5°F 1989 | |
| Dec 24 | 58°F | 34°F | 78°F 1970 | 4°F 1989 | |
| Dec 25 | 58°F | 34°F | 78°F 1964 | 7°F 1983 | |
| Dec 26 | 58°F | 34°F | 80°F 2015 | 6°F 1983 | |
| Dec 27 | 58°F | 34°F | 80°F 2015 | 8°F 1983 | |
| Dec 28 | 58°F | 34°F | 80°F 2015 | 18°F 1970 | |
| Dec 29 | 58°F | 34°F | 80°F 2015 | 19°F 2010 | |
| Dec 30 | 58°F | 34°F | 76°F 1973 | 13°F 1983 | |
| Dec 31 | 57°F | 34°F | 80°F 1984 | 12°F 1983 |
Chance of rain
Sunrise and sunset
Times for 2026, local time (CST).
- December 1
- sunrise 6:37 AM, sunset 4:47 PM
- December 31
- sunrise 6:55 AM, sunset 4:57 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00014798 (Livingston), public domain. Records: NOAA GHCN-Daily, station USC00012245, 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.