Harrisburg Weather in December
Average highs run from 45°F on December 1 to 40°F on December 31, and lows from 16°F to 13°F. Normal precipitation for the month is 0.49 in over about 5 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
- 41°F
- Average low
- 13°F
- Precipitation
- 0.49 in
- Snowfall
- 8.4 in
- Record high
- 76°FDec 3, 2021
- Record low
- -26°FDec 31, 2014
- Chance of a freeze
- 100%
- Daylight
- 9 h 24 min to 9 h 14 min
- Cloud cover
- 61%
- Humidity
- 62%
- Dew point
- 17°F
- Wind
- 12.3 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 | 45°F | 16°F | 66°F 2012 | 3°F 2025 | 14% | 12% |
| Dec 2 | 44°F | 15°F | 70°F 2021 | 5°F 2007 | 14% | 12% |
| Dec 3 | 44°F | 15°F | 76°F 2021 | 1°F 2006 | 14% | 12% |
| Dec 4 | 44°F | 15°F | 64°F 2024 | -5°F 2009 | 14% | 13% |
| Dec 5 | 43°F | 15°F | 62°F 2007 | -11°F 2013 | 14% | 13% |
| Dec 6 | 43°F | 14°F | 67°F 2012 | -16°F 2013 | 14% | 13% |
| Dec 7 | 43°F | 14°F | 69°F 2023 | -11°F 2005 | 14% | 13% |
| Dec 8 | 42°F | 14°F | 64°F 2003 | -16°F 2005 | 14% | 13% |
| Dec 9 | 42°F | 14°F | 65°F 2020 | -14°F 2009 | 14% | 13% |
| Dec 10 | 42°F | 14°F | 67°F 2015 | -18°F 2009 | 14% | 13% |
| Dec 11 | 42°F | 13°F | 59°F 2017 | -17°F 2009 | 14% | 13% |
| Dec 12 | 41°F | 13°F | 65°F 2025 | -5°F 2007 | 14% | 14% |
| Dec 13 | 41°F | 13°F | 64°F 2017 | -5°F 2007 | 14% | 14% |
| Dec 14 | 41°F | 13°F | 63°F 2006 | -5°F 2008 | 15% | 14% |
| Dec 15 | 41°F | 13°F | 61°F 2006 | -10°F 2008 | 15% | 14% |
| Dec 16 | 41°F | 13°F | 66°F 2025 | -12°F 2008 | 15% | 14% |
| Dec 17 | 41°F | 13°F | 67°F 2025 | -7°F 2016 | 15% | 14% |
| Dec 18 | 40°F | 13°F | 67°F 2025 | -21°F 2016 | 15% | 14% |
| Dec 19 | 40°F | 13°F | 61°F 2013 | -20°F 2016 | 15% | 14% |
| Dec 20 | 40°F | 13°F | 68°F 2025 | -4°F 2016 | 15% | 14% |
| Dec 21 | 40°F | 13°F | 67°F 2017 | -4°F 2008 | 15% | 15% |
| Dec 22 | 40°F | 13°F | 64°F 2024 | -19°F 2022 | 15% | 15% |
| Dec 23 | 40°F | 13°F | 70°F 2025 | -13°F 2022 | 15% | 15% |
| Dec 24 | 40°F | 13°F | 71°F 2025 | -13°F 2017 | 15% | 14% |
| Dec 25 | 40°F | 13°F | 72°F 2025 | -13°F 2017 | 15% | 14% |
| Dec 26 | 40°F | 13°F | 69°F 2025 | -6°F 2007 | 15% | 14% |
| Dec 27 | 40°F | 13°F | 68°F 2025 | -14°F 2017 | 15% | 14% |
| Dec 28 | 40°F | 13°F | 62°F 2022 | -13°F 2017 | 15% | 14% |
| Dec 29 | 40°F | 13°F | 64°F 2002 | -4°F 2015 | 15% | 14% |
| Dec 30 | 40°F | 13°F | 58°F 2011 | -3°F 2015 | 15% | 14% |
| Dec 31 | 40°F | 13°F | 59°F 2011 | -26°F 2014 | 15% | 14% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:02 AM, sunset 4:26 PM
- December 31
- sunrise 7:21 AM, sunset 4:35 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00253605 (Harrisburg 12WNW), public domain. Records: NOAA GHCN-Daily, station USC00257667, 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.