South Suffolk Weather in December
Average highs run from 56°F on December 1 to 50°F on December 31, and lows from 37°F to 33°F. Normal precipitation for the month is 3.69 in over about 10 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
- 53°F
- Average low
- 35°F
- Precipitation
- 3.69 in
- Snowfall
- 0.9 in
- Record high
- 80°FDec 3, 1991
- Record low
- 4°FDec 25, 1983
- Chance of a freeze
- 99%
- Daylight
- 9 h 50 min to 9 h 41 min
- Cloud cover
- 58%
- Humidity
- 83%
- Dew point
- 39°F
- Wind
- 10.7 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 | 56°F | 37°F | 76°F 2001 | 18°F 1958 | 32% | 1% |
| Dec 2 | 56°F | 37°F | 76°F 1991 | 20°F 1947 | 32% | 1% |
| Dec 3 | 55°F | 37°F | 80°F 1991 | 17°F 1946 | 32% | 1% |
| Dec 4 | 55°F | 37°F | 79°F 1978 | 18°F 1946 | 32% | 1% |
| Dec 5 | 55°F | 37°F | 77°F 1982 | 18°F 1946 | 32% | 1% |
| Dec 6 | 55°F | 36°F | 78°F 1998 | 22°F 1949 | 32% | 1% |
| Dec 7 | 55°F | 36°F | 79°F 1998 | 15°F 1954 | 33% | 1% |
| Dec 8 | 54°F | 36°F | 79°F 1998 | 12°F 1954 | 33% | 1% |
| Dec 9 | 54°F | 36°F | 78°F 1978 | 19°F 1976 | 33% | 1% |
| Dec 10 | 54°F | 36°F | 76°F 1966 | 19°F 1960 | 33% | 1% |
| Dec 11 | 54°F | 36°F | 74°F 1971 | 15°F 1977 | 33% | 1% |
| Dec 12 | 53°F | 35°F | 76°F 1970 | 14°F 1957 | 33% | 1% |
| Dec 13 | 53°F | 35°F | 74°F 1956 | 10°F 1962 | 33% | 1% |
| Dec 14 | 53°F | 35°F | 74°F 2001 | 16°F 1960 | 33% | 1% |
| Dec 15 | 53°F | 35°F | 74°F 1971 | 8°F 1958 | 33% | 1% |
| Dec 16 | 53°F | 35°F | 78°F 1971 | 5°F 1958 | 33% | 1% |
| Dec 17 | 52°F | 35°F | 70°F 2021 | 11°F 1951 | 33% | 1% |
| Dec 18 | 52°F | 35°F | 75°F 1984 | 15°F 1953 | 33% | 1% |
| Dec 19 | 52°F | 34°F | 72°F 1984 | 12°F 1953 | 33% | 1% |
| Dec 20 | 52°F | 34°F | 70°F 1957 | 14°F 1950 | 33% | 1% |
| Dec 21 | 52°F | 34°F | 74°F 1990 | 11°F 1963 | 33% | 1% |
| Dec 22 | 51°F | 34°F | 79°F 2013 | 10°F 1954 | 33% | 2% |
| Dec 23 | 51°F | 34°F | 76°F 1990 | 13°F 1989 | 33% | 2% |
| Dec 24 | 51°F | 34°F | 79°F 2015 | 7°F 1983 | 34% | 2% |
| Dec 25 | 51°F | 33°F | 79°F 2015 | 4°F 1983 | 34% | 2% |
| Dec 26 | 51°F | 33°F | 74°F 1982 | 5°F 1983 | 34% | 2% |
| Dec 27 | 51°F | 33°F | 74°F 2015 | 10°F 1948 | 34% | 2% |
| Dec 28 | 51°F | 33°F | 74°F 1988 | 14°F 1951 | 34% | 2% |
| Dec 29 | 50°F | 33°F | 76°F 2015 | 13°F 1952 | 34% | 2% |
| Dec 30 | 50°F | 33°F | 75°F 2019 | 17°F 2010 | 34% | 2% |
| Dec 31 | 50°F | 33°F | 70°F 1990 | 14°F 1962 | 34% | 2% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:00 AM, sunset 4:50 PM
- December 31
- sunrise 7:19 AM, sunset 5:00 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00448192 (Suffolk Lake Kilby), public domain. Records: NOAA GHCN-Daily, station USC00448192, 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.