Derby climate

Derby Weather in December

NOAA 1991-2020 normals for Ansonia 1 Ne, 3.1 km from Derby

Average highs run from 45°F on December 1 to 39°F on December 31, and lows from 27°F to 20°F. Normal precipitation for the month is 4.57 in over about 9 wet days.

December day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Derby, in °F, with the record for each date.-20020406080151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

December at a glance

Average high
41°F
Average low
23°F
Precipitation
4.57 in
Snowfall
5.5 in
Record high
64°FDec 2, 2014
Record low
0°FDec 10, 2014
Chance of a freeze
100%
Daylight
9 h 25 min to 9 h 15 min
Cloud cover
63%
Humidity
86%
Dew point
28°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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Dec 145°F27°F62°F 201616°F 201331%6%
Dec 244°F27°F64°F 201423°F 201931%6%
Dec 344°F26°F51°F 201126°F 201131%6%
Dec 444°F26°F55°F 201222°F 201931%6%
Dec 543°F26°F55°F 201223°F 201431%7%
Dec 643°F26°F53°F 201123°F 201431%7%
Dec 743°F25°F57°F 201122°F 201930%7%
Dec 843°F25°F55°F 201113°F 201930%7%
Dec 942°F25°F49°F 201218°F 201430%8%
Dec 1042°F25°F49°F 20150°F 201430%8%
Dec 1142°F24°F59°F 201517°F 201330%8%
Dec 1242°F24°F57°F 201517°F 201330%8%
Dec 1342°F24°F58°F 201510°F 201330%9%
Dec 1441°F24°F62°F 201517°F 201330%9%
Dec 1541°F23°F61°F 201515°F 201330%9%
Dec 1641°F23°F54°F 20119°F 201630%9%
Dec 1741°F23°F50°F 20147°F 201329%10%
Dec 1841°F23°F48°F 201512°F 201329%10%
Dec 1941°F22°F51°F 201612°F 201929%10%
Dec 2040°F22°F48°F 20129°F 201629%10%
Dec 2140°F22°F62°F 20159°F 201629%10%
Dec 2240°F22°F57°F 201315°F 201929%11%
Dec 2340°F22°F63°F 201316°F 201929%11%
Dec 2440°F22°F62°F 201920°F 201229%11%
Dec 2540°F21°F54°F 201417°F 201329%11%
Dec 2639°F21°F51°F 201416°F 201329%11%
Dec 2739°F21°F54°F 201616°F 201329%12%
Dec 2839°F21°F58°F 201616°F 201329%12%
Dec 2939°F21°F47°F 201120°F 201129%12%
Dec 3039°F21°F44°F 201920°F 201129%12%
Dec 3139°F20°F51°F 201114°F 201229%12%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Derby, in percent, and of at least 0.1 inch of snowfall.0102030401102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (EST).

December 1
sunrise 6:59 AM, sunset 4:24 PM
December 31
sunrise 7:18 AM, sunset 4:33 PM

Every day of December: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00060128 (Ansonia 1 Ne), public domain. Records: NOAA GHCN-Daily, station USC00060128, 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.