Peconic Weather in December
Average highs run from 48°F on December 1 to 40°F on December 31, and lows from 32°F to 25°F. Normal precipitation for the month is 4.26 in.
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
- 43°F
- Average low
- 28°F
- Precipitation
- 4.26 in
- Snowfall
- 4.1 in
- Record high
- 70°FDec 4, 1998
- Record low
- -6°FDec 20, 1942
- Chance of a freeze
- 100%
- Daylight
- 9 h 26 min to 9 h 16 min
- Cloud cover
- 63%
- Humidity
- 82%
- Dew point
- 34°F
- Wind
- 13.2 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 | 48°F | 32°F | 69°F 2001 | 15°F 1936 | 3% | |
| Dec 2 | 47°F | 31°F | 64°F 2006 | 11°F 1989 | 3% | |
| Dec 3 | 47°F | 31°F | 65°F 1998 | 13°F 1930 | 4% | |
| Dec 4 | 47°F | 31°F | 70°F 1998 | 8°F 1940 | 4% | |
| Dec 5 | 46°F | 31°F | 65°F 2001 | 15°F 1935 | 4% | |
| Dec 6 | 46°F | 30°F | 63°F 2001 | 15°F 1935 | 4% | |
| Dec 7 | 46°F | 30°F | 70°F 1998 | 6°F 2002 | 4% | |
| Dec 8 | 45°F | 30°F | 63°F 1953 | 14°F 1934 | 5% | |
| Dec 9 | 45°F | 30°F | 64°F 1991 | 9°F 2002 | 5% | |
| Dec 10 | 45°F | 30°F | 64°F 1946 | 8°F 1968 | 5% | |
| Dec 11 | 44°F | 29°F | 65°F 1971 | 10°F 1943 | 5% | |
| Dec 12 | 44°F | 29°F | 61°F 1931 | 7°F 1988 | 5% | |
| Dec 13 | 44°F | 29°F | 66°F 2010 | 4°F 1982 | 6% | |
| Dec 14 | 44°F | 29°F | 60°F 2015 | 0°F 1982 | 6% | |
| Dec 15 | 43°F | 28°F | 62°F 2015 | 7°F 1989 | 6% | |
| Dec 16 | 43°F | 28°F | 61°F 1971 | 9°F 1930 | 6% | |
| Dec 17 | 43°F | 28°F | 58°F 2000 | 8°F 1942 | 6% | |
| Dec 18 | 43°F | 28°F | 59°F 2015 | 5°F 1980 | 7% | |
| Dec 19 | 42°F | 28°F | 60°F 2023 | 11°F 1932 | 7% | |
| Dec 20 | 42°F | 27°F | 58°F 1957 | -6°F 1942 | 7% | |
| Dec 21 | 42°F | 27°F | 59°F 1973 | -2°F 1942 | 7% | |
| Dec 22 | 42°F | 27°F | 59°F 2018 | 3°F 1942 | 7% | |
| Dec 23 | 41°F | 27°F | 61°F 2013 | 6°F 1989 | 7% | |
| Dec 24 | 41°F | 26°F | 63°F 2015 | 5°F 1943 | 7% | |
| Dec 25 | 41°F | 26°F | 65°F 2015 | -1°F 1980 | 8% | |
| Dec 26 | 41°F | 26°F | 68°F 2015 | -5°F 1980 | 8% | |
| Dec 27 | 41°F | 26°F | 60°F 1973 | 7°F 1948 | 8% | |
| Dec 28 | 40°F | 26°F | 60°F 2015 | 1°F 1950 | 8% | |
| Dec 29 | 40°F | 25°F | 61°F 1984 | -3°F 1933 | 8% | |
| Dec 30 | 40°F | 25°F | 58°F 1984 | -5°F 1933 | 8% | |
| Dec 31 | 40°F | 25°F | 57°F 1992 | 1°F 1962 | 8% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 6:56 AM, sunset 4:22 PM
- December 31
- sunrise 7:15 AM, sunset 4:31 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00305142 (Mattituck), public domain. Records: NOAA GHCN-Daily, station USC00300889, 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.