Sullivan County Weather in December
Average highs run from 40°F on December 1 to 32°F on December 31, and lows from 24°F to 16°F. Normal precipitation for the month is 4.73 in over about 11 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
- 35°F
- Average low
- 20°F
- Precipitation
- 4.73 in
- Snowfall
- 15.3 in
- Record high
- 65°FDec 7, 2001
- Record low
- -20°FDec 29, 1917
- Chance of a freeze
- 100%
- Daylight
- 9 h 22 min to 9 h 12 min
- Cloud cover
- 68%
- Humidity
- 88%
- Dew point
- 25°F
- Wind
- 5.8 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 | 40°F | 24°F | 64°F 1962 | 1°F 1976 | 32% | 11% |
| Dec 2 | 40°F | 24°F | 64°F 1913 | 0°F 1946 | 32% | 11% |
| Dec 3 | 39°F | 23°F | 60°F 1982 | -4°F 1906 | 33% | 12% |
| Dec 4 | 39°F | 23°F | 58°F 1982 | -16°F 1906 | 33% | 12% |
| Dec 5 | 39°F | 23°F | 63°F 1973 | -3°F 2025 | 33% | 12% |
| Dec 6 | 38°F | 23°F | 61°F 1982 | -3°F 2025 | 33% | 13% |
| Dec 7 | 38°F | 22°F | 65°F 2001 | 2°F 1954 | 33% | 13% |
| Dec 8 | 38°F | 22°F | 55°F 1956 | -12°F 1906 | 33% | 13% |
| Dec 9 | 37°F | 22°F | 60°F 1946 | -4°F 1917 | 34% | 14% |
| Dec 10 | 37°F | 21°F | 63°F 1966 | -3°F 1968 | 34% | 14% |
| Dec 11 | 36°F | 21°F | 60°F 1911 | -8°F 1958 | 34% | 14% |
| Dec 12 | 36°F | 21°F | 60°F 1979 | -8°F 1958 | 34% | 14% |
| Dec 13 | 36°F | 21°F | 60°F 1979 | -4°F 1960 | 34% | 14% |
| Dec 14 | 35°F | 20°F | 60°F 2015 | -9°F 2005 | 34% | 15% |
| Dec 15 | 35°F | 20°F | 57°F 2015 | -7°F 2005 | 34% | 15% |
| Dec 16 | 35°F | 20°F | 55°F 1975 | -5°F 1910 | 34% | 15% |
| Dec 17 | 35°F | 20°F | 60°F 2021 | -10°F 1951 | 34% | 15% |
| Dec 18 | 34°F | 19°F | 58°F 1984 | 0°F 1953 | 34% | 15% |
| Dec 19 | 34°F | 19°F | 51°F 2023 | -5°F 1985 | 34% | 15% |
| Dec 20 | 34°F | 19°F | 54°F 1957 | -10°F 1951 | 34% | 16% |
| Dec 21 | 34°F | 18°F | 56°F 1957 | -13°F 1955 | 34% | 16% |
| Dec 22 | 33°F | 18°F | 55°F 2013 | -10°F 1958 | 34% | 16% |
| Dec 23 | 33°F | 18°F | 58°F 1990 | -12°F 1960 | 34% | 16% |
| Dec 24 | 33°F | 18°F | 60°F 1990 | -12°F 1906 | 34% | 16% |
| Dec 25 | 33°F | 17°F | 63°F 2015 | -16°F 1980 | 34% | 16% |
| Dec 26 | 32°F | 17°F | 58°F 2015 | -16°F 1980 | 34% | 16% |
| Dec 27 | 32°F | 17°F | 53°F 1954 | -8°F 1903 | 34% | 16% |
| Dec 28 | 32°F | 17°F | 54°F 1949 | -12°F 1917 | 34% | 17% |
| Dec 29 | 32°F | 16°F | 58°F 1982 | -20°F 1917 | 34% | 17% |
| Dec 30 | 32°F | 16°F | 65°F 1984 | -14°F 1917 | 34% | 17% |
| Dec 31 | 32°F | 16°F | 55°F 1898 | -12°F 1917 | 34% | 17% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:07 AM, sunset 4:29 PM
- December 31
- sunrise 7:26 AM, sunset 4:38 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00304731 (Liberty 1 Ne), public domain. Records: NOAA GHCN-Daily, station USC00304731, 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.