Cornish Weather in December
Average highs run from 39°F on December 1 to 30°F on December 31, and lows from 21°F to 10°F. Normal precipitation for the month is 4.43 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
- 34°F
- Average low
- 15°F
- Precipitation
- 4.43 in
- Snowfall
- 17.6 in
- Record high
- 71°FDec 7, 1998
- Record low
- -28°FDec 29, 2017
- Chance of a freeze
- 100%
- Daylight
- 9 h 10 min to 8 h 59 min
- Cloud cover
- 68%
- Humidity
- 92%
- Dew point
- 20°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 | 39°F | 21°F | 62°F 2001 | 4°F 2007 | 38% | 14% |
| Dec 2 | 38°F | 20°F | 60°F 1998 | 3°F 2002 | 38% | 15% |
| Dec 3 | 38°F | 20°F | 62°F 2009 | -1°F 2000 | 38% | 15% |
| Dec 4 | 37°F | 20°F | 64°F 1998 | 1°F 2003 | 38% | 16% |
| Dec 5 | 37°F | 19°F | 60°F 2001 | -11°F 2025 | 38% | 16% |
| Dec 6 | 37°F | 19°F | 69°F 2001 | -5°F 2007 | 38% | 17% |
| Dec 7 | 36°F | 19°F | 71°F 1998 | -3°F 2007 | 37% | 17% |
| Dec 8 | 36°F | 18°F | 49°F 1999 | -6°F 2000 | 37% | 17% |
| Dec 9 | 36°F | 18°F | 46°F 2012 | -16°F 2025 | 37% | 18% |
| Dec 10 | 35°F | 18°F | 55°F 2008 | -5°F 2003 | 37% | 18% |
| Dec 11 | 35°F | 17°F | 51°F 2021 | -5°F 2018 | 37% | 19% |
| Dec 12 | 35°F | 17°F | 57°F 2015 | -4°F 2013 | 37% | 19% |
| Dec 13 | 34°F | 16°F | 53°F 2010 | -9°F 2018 | 37% | 19% |
| Dec 14 | 34°F | 16°F | 53°F 2006 | -11°F 2003 | 37% | 19% |
| Dec 15 | 34°F | 16°F | 56°F 2008 | -11°F 2005 | 37% | 20% |
| Dec 16 | 34°F | 15°F | 52°F 2008 | -15°F 2016 | 37% | 20% |
| Dec 17 | 33°F | 15°F | 58°F 2000 | -22°F 2013 | 37% | 20% |
| Dec 18 | 33°F | 15°F | 59°F 2023 | -18°F 2009 | 37% | 20% |
| Dec 19 | 33°F | 14°F | 54°F 2025 | -14°F 2009 | 37% | 21% |
| Dec 20 | 32°F | 14°F | 42°F 1998 | -16°F 2016 | 37% | 21% |
| Dec 21 | 32°F | 14°F | 50°F 2012 | -18°F 2004 | 37% | 21% |
| Dec 22 | 32°F | 13°F | 54°F 2018 | -5°F 2004 | 37% | 21% |
| Dec 23 | 32°F | 13°F | 55°F 2004 | -14°F 2008 | 37% | 21% |
| Dec 24 | 32°F | 12°F | 61°F 2015 | -4°F 2000 | 37% | 22% |
| Dec 25 | 31°F | 12°F | 62°F 2015 | -8°F 2024 | 37% | 22% |
| Dec 26 | 31°F | 12°F | 51°F 2015 | -6°F 2025 | 37% | 22% |
| Dec 27 | 31°F | 11°F | 50°F 2016 | -10°F 2017 | 37% | 22% |
| Dec 28 | 31°F | 11°F | 52°F 2008 | -20°F 2017 | 37% | 22% |
| Dec 29 | 31°F | 11°F | 51°F 2003 | -28°F 2017 | 36% | 22% |
| Dec 30 | 30°F | 10°F | 47°F 2003 | -26°F 2017 | 36% | 22% |
| Dec 31 | 30°F | 10°F | 52°F 2022 | -21°F 2017 | 36% | 23% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EST).
- December 1
- sunrise 6:57 AM, sunset 4:07 PM
- December 31
- sunrise 7:17 AM, sunset 4:16 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00172238 (East Hiram), public domain. Records: NOAA GHCN-Daily, station USW00054772, 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.