Caln Weather in December
Average highs run from 48°F on December 1 to 40°F on December 31, and lows from 30°F to 24°F. Normal precipitation for the month is 4.79 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
- 43°F
- Average low
- 27°F
- Precipitation
- 4.79 in
- Snowfall
- 4.4 in
- Record high
- 75°FDec 5, 2001
- Record low
- -3°FDec 25, 1983
- Chance of a freeze
- 100%
- Daylight
- 9 h 32 min to 9 h 23 min
- Cloud cover
- 67%
- Humidity
- 86%
- Dew point
- 29°F
- Wind
- 6.9 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 | 30°F | 71°F 2006 | 20°F 1993 | 37% | 6% |
| Dec 2 | 47°F | 30°F | 63°F 1998 | 19°F 1989 | 37% | 7% |
| Dec 3 | 47°F | 30°F | 69°F 1998 | 14°F 2000 | 37% | 7% |
| Dec 4 | 47°F | 29°F | 71°F 1998 | 15°F 1989 | 37% | 7% |
| Dec 5 | 46°F | 29°F | 75°F 2001 | 18°F 1991 | 37% | 7% |
| Dec 6 | 46°F | 29°F | 73°F 1998 | 9°F 2002 | 37% | 7% |
| Dec 7 | 45°F | 29°F | 75°F 1998 | 6°F 2002 | 38% | 8% |
| Dec 8 | 45°F | 28°F | 57°F 2004 | 15°F 2003 | 38% | 8% |
| Dec 9 | 45°F | 28°F | 62°F 1991 | 6°F 1989 | 38% | 8% |
| Dec 10 | 45°F | 28°F | 55°F 2006 | 8°F 1989 | 38% | 8% |
| Dec 11 | 44°F | 28°F | 57°F 1985 | 7°F 1995 | 38% | 8% |
| Dec 12 | 44°F | 28°F | 60°F 1983 | 2°F 1988 | 38% | 9% |
| Dec 13 | 44°F | 27°F | 60°F 1984 | 2°F 1988 | 38% | 9% |
| Dec 14 | 43°F | 27°F | 62°F 2001 | 3°F 2005 | 38% | 9% |
| Dec 15 | 43°F | 27°F | 55°F 2001 | 7°F 2005 | 38% | 9% |
| Dec 16 | 43°F | 27°F | 57°F 1997 | 11°F 1989 | 38% | 9% |
| Dec 17 | 43°F | 27°F | 62°F 2000 | 9°F 1989 | 37% | 10% |
| Dec 18 | 42°F | 27°F | 68°F 2006 | 5°F 1989 | 37% | 10% |
| Dec 19 | 42°F | 26°F | 52°F 2001 | 4°F 1989 | 37% | 10% |
| Dec 20 | 42°F | 26°F | 60°F 2002 | 5°F 2004 | 37% | 10% |
| Dec 21 | 42°F | 26°F | 56°F 1990 | 2°F 1989 | 37% | 11% |
| Dec 22 | 41°F | 26°F | 60°F 1998 | 1°F 1989 | 37% | 11% |
| Dec 23 | 41°F | 26°F | 63°F 1990 | 3°F 1989 | 37% | 11% |
| Dec 24 | 41°F | 25°F | 61°F 1990 | -1°F 1983 | 37% | 11% |
| Dec 25 | 41°F | 25°F | 54°F 1987 | -3°F 1983 | 37% | 11% |
| Dec 26 | 41°F | 25°F | 54°F 2006 | 0°F 1983 | 37% | 12% |
| Dec 27 | 40°F | 25°F | 52°F 1994 | 5°F 1989 | 37% | 12% |
| Dec 28 | 40°F | 25°F | 59°F 1984 | 13°F 1989 | 37% | 12% |
| Dec 29 | 40°F | 25°F | 73°F 1984 | 10°F 2000 | 37% | 13% |
| Dec 30 | 40°F | 24°F | 60°F 1984 | 7°F 1987 | 37% | 13% |
| Dec 31 | 40°F | 24°F | 63°F 1992 | 6°F 1987 | 37% | 13% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 7:06 AM, sunset 4:38 PM
- December 31
- sunrise 7:25 AM, sunset 4:48 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00361591 (Coatesville 2 W), public domain. Records: NOAA GHCN-Daily, station USC00361591, 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.