Pennsylvania weather in December: Statewide normals and every place, NOAA 1991-2020
In December, Pennsylvania's statewide normal high is 39°F and normal low 24°F; normal highs run from 34°F in Laporte to 48°F in Marcus Hook (NOAA 1991-2020 normals).
- Statewide normal high
- 39°FDecember, 1991-2020
- Statewide normal low
- 24°FDecember, 1991-2020
- Statewide normal precipitation
- 3.50 inDecember
- Warmest place
- 48°Fnormal high, Marcus Hook
- Coolest place
- 34°Fnormal high, Laporte
Where is Pennsylvania warmest and wettest in December?
Marcus Hook has the warmest December afternoons (48°F) and Laporte the coolest (34°F). Coatesville gets the most precipitation (4.79 in) and Tioga the least (2.48 in). The most snow falls in Union City (27.6 inches).
Statewide, December averaged 37.6°F in 2021, 30.6°F in 2022, 37.9°F in 2023, 31.0°F in 2024, 27.2°F in 2025, against a 1991-2020 normal of 31.7°F.
| Place | High | Low | Precip. | Snow |
|---|---|---|---|---|
| Philadelphia | 46°F | 31°F | 3.97 | 3.5 |
| Pittsburgh | 41°F | 27°F | 2.84 | 7.7 |
| Allentown | 43°F | 27°F | 3.86 | 4.6 |
| Reading | 43°F | 28°F | 3.51 | – |
| Erie | 40°F | 28°F | 4.17 | 26.3 |
| Lancaster | 44°F | 27°F | 3.13 | – |
| Harrisburg | 44°F | 30°F | 3.15 | – |
| York | 44°F | 25°F | 3.06 | – |
| Altoona | 40°F | 26°F | 2.57 | – |
| State College | 38°F | 26°F | 3.18 | 7.6 |
| Norristown | 46°F | 28°F | 4.73 | 4.2 |
| Williamsport | 40°F | 26°F | 3.27 | 6.9 |
| Lebanon | 42°F | 27°F | 3.57 | 4.0 |
| Pottstown | 42°F | 27°F | 3.76 | – |
| Chambersburg | 41°F | 27°F | 3.45 | 5.5 |
| West Chester | 44°F | 25°F | 4.72 | 4.4 |
| Carlisle | 42°F | 25°F | 3.57 | 4.0 |
| New Castle | 42°F | 25°F | 3.13 | 4.9 |
| Murrysville | 41°F | 27°F | 3.22 | 5.3 |
| Phoenixville | 45°F | 27°F | 4.08 | – |
| West Mifflin | 41°F | 28°F | 3.04 | – |
| Johnstown | 38°F | 25°F | 2.68 | – |
| McKeesport | 43°F | 25°F | 3.55 | – |
| Hanover | 44°F | 26°F | 3.51 | 4.5 |
| Indiana | 41°F | 24°F | 3.64 | 10.8 |
| Willow Grove | 44°F | 30°F | – | – |
| Carnot-Moon | 40°F | 26°F | 3.25 | – |
| Coatesville | 43°F | 27°F | 4.79 | 4.4 |
| Washington | 41°F | 26°F | 3.32 | 6.0 |
| Butler | 39°F | 23°F | 3.37 | 6.8 |
| Middletown | 43°F | 28°F | 3.43 | 4.4 |
| Uniontown | 44°F | 26°F | 3.33 | 3.6 |
| Sunbury | 40°F | 25°F | 3.34 | 4.9 |
| East Stroudsburg | 40°F | 25°F | 4.42 | 8.0 |
| Warren | 37°F | 24°F | 3.81 | 18.5 |
| Beaver Falls | 40°F | 25°F | 3.01 | – |
| Lock Haven | 40°F | 24°F | 3.02 | 5.9 |
| Lewistown | 41°F | 26°F | 3.27 | 4.7 |
| Doylestown | 44°F | 28°F | 3.95 | – |
| Bradford | 35°F | 22°F | 3.17 | – |
| DuBois | 36°F | 23°F | 2.96 | – |
| Connellsville | 43°F | 26°F | 3.34 | 3.7 |
| Franklin | 38°F | 24°F | 3.36 | 11.7 |
| New Holland | 43°F | 29°F | 3.69 | 4.6 |
| Clearfield | 38°F | 23°F | 2.93 | – |
| Shippensburg | 42°F | 27°F | 3.36 | 5.4 |
| Selinsgrove | 41°F | 25°F | 2.81 | – |
| Lehighton | 40°F | 24°F | 4.36 | 2.7 |
| Lewisburg | 40°F | 24°F | 3.35 | 5.4 |
| Titusville | 37°F | 21°F | 3.72 | 22.0 |
| Hamburg | 42°F | 26°F | 3.89 | 3.7 |
| Sellersville | 43°F | 25°F | 4.44 | 3.2 |
| Donora | 43°F | 26°F | 2.90 | 3.3 |
| Charleroi | 43°F | 27°F | 3.27 | 1.5 |
| Mount Pleasant | 42°F | 25°F | 3.78 | 6.4 |
| Clarion | 38°F | 22°F | 3.73 | – |
| Ridgway | 38°F | 23°F | 3.45 | 12.3 |
| Waynesburg | 43°F | 25°F | 3.29 | 5.6 |
| Slippery Rock | 38°F | 23°F | 3.19 | – |
| Mahanoy City | 37°F | 23°F | 4.29 | 9.0 |
| Kane | 35°F | 20°F | 3.99 | 21.7 |
| Loyalhanna | 41°F | 24°F | 3.57 | – |
| Wellsboro | 35°F | 21°F | 3.26 | 12.7 |
| Ebensburg | 37°F | 22°F | 4.02 | 14.1 |
| Mount Pocono | 35°F | 21°F | 3.78 | – |
| Union City | 37°F | 23°F | 4.20 | 27.6 |
| Towanda | 40°F | 24°F | 2.71 | 7.4 |
| Ford City | 40°F | 23°F | 3.38 | – |
| Philipsburg | 36°F | 21°F | 3.14 | 9.6 |
| Avoca | 40°F | 26°F | 2.80 | 7.7 |
| Landisville | 42°F | 24°F | 3.33 | 3.9 |
| Marcus Hook | 48°F | 32°F | 3.25 | – |
| Matamoras | 40°F | 23°F | 3.96 | 10.0 |
| Emsworth | 43°F | 26°F | 3.02 | – |
| Coudersport | 35°F | 20°F | 3.37 | 15.3 |
| Port Allegany | 36°F | 21°F | 3.24 | 13.3 |
| Meyersdale | 39°F | 21°F | 3.06 | 6.9 |
| Mercer | 40°F | 21°F | – | – |
| Emporium | 38°F | 23°F | 3.25 | 9.5 |
| Everett | 43°F | 25°F | 3.13 | 6.4 |
| Canton | 38°F | 22°F | 3.09 | 8.8 |
| Braddock | 42°F | 28°F | 3.01 | – |
| Avondale | 43°F | 28°F | 4.03 | – |
| Montrose | 36°F | 19°F | 3.58 | 14.9 |
| Biglerville | 43°F | 27°F | 3.44 | 3.6 |
| Hawley | 38°F | 20°F | 3.63 | 9.1 |
| Point Marion | 43°F | 26°F | 3.37 | – |
| Renovo | 39°F | 25°F | 3.13 | 6.7 |
| Linesville | 37°F | 24°F | 3.17 | 17.4 |
| Glenmoore | 43°F | 28°F | 4.48 | 3.9 |
| Millheim | 38°F | 22°F | 3.20 | 6.1 |
| Benton | 38°F | 22°F | 3.58 | 8.0 |
| Natrona | 41°F | 26°F | 3.26 | – |
| Clarence | 38°F | 21°F | 3.46 | 9.0 |
| Confluence | 41°F | 24°F | 3.52 | 10.9 |
| Tioga | 37°F | 22°F | 2.48 | 9.6 |
| Jamestown | 39°F | 23°F | 3.22 | 13.4 |
| Dushore | 38°F | 21°F | 3.08 | 8.0 |
| Tionesta | 39°F | 25°F | 3.71 | 13.3 |
| Laurelton | 40°F | 26°F | – | – |
| Springboro | 37°F | 24°F | 3.90 | 26.2 |
| Grampian | 37°F | 21°F | 4.20 | 11.8 |
| Laporte | 34°F | 20°F | 4.41 | 12.5 |
| Cashtown | 42°F | 25°F | 3.73 | – |
| Laurel Mountain | 41°F | 26°F | 3.64 | – |
| Oswayo | 35°F | 19°F | 3.08 | 14.7 |
| Donegal | 41°F | 25°F | 4.65 | – |
| Schenley | 41°F | 26°F | 3.21 | – |
| Acmetonia Lock 3 | 42°F | 26°F | 3.66 | – |
| Alvin R Bush Dam | 38°F | 26°F | – | – |
| Bear Gap | 40°F | 25°F | 3.66 | 4.6 |
| Bloserville (1 mi N) | 41°F | 27°F | 3.48 | – |
| Blue Marsh Lake | 42°F | 25°F | 3.77 | – |
| Bucksville | 43°F | 25°F | 4.54 | – |
| Chalk Hill (2 mi ENE) | 39°F | 20°F | 4.51 | 17.6 |
| Chandlers Valley (1 mi SE) | 36°F | 20°F | 4.01 | 28.0 |
| Clermont (1 mi NW) | 34°F | 20°F | 4.11 | 18.2 |
| Cooksburg (2 mi NW) | 37°F | 20°F | 3.65 | – |
| Cowanesque Dam | 37°F | 22°F | 2.45 | 8.5 |
| Dehart Dam | 42°F | 25°F | 4.01 | 4.4 |
| Eisenhower National Historic Site | 45°F | 26°F | 3.34 | – |
| Francis E Walter Dam | 36°F | 22°F | 3.84 | – |
| Glen Hazel 2 NE Dam | 35°F | 20°F | 3.60 | 14.2 |
| Glenwillard Dashields Lock and Dam | 40°F | 27°F | 2.79 | 2.5 |
| Graterford (1 mi E) | 45°F | 25°F | 4.38 | 2.2 |
| Grays Landing | 43°F | 25°F | 3.23 | 4.1 |
| Hidden Valley | 37°F | 23°F | 5.01 | – |
| Hopewell Morgantown | 42°F | 27°F | – | – |
| Laurel Summit | 35°F | 20°F | 4.43 | 26.9 |
| Milanville | 38°F | 21°F | 3.67 | – |
| Montgomery Lock and Dam | 40°F | 26°F | 2.92 | – |
| Neshaminy Falls | 44°F | 27°F | 4.65 | 3.4 |
| Octoraro Lake | 43°F | 27°F | 4.13 | 3.0 |
| Phila Franklin Inst | 47°F | 33°F | 4.27 | 3.5 |
| Philadelphia NE Airport | 47°F | 31°F | 4.00 | – |
| Pleasant Mount (1 mi W) | 34°F | 19°F | 3.97 | 14.6 |
| Port Meadville Airport | 37°F | 25°F | 2.59 | – |
| Prince Gallitzin State Park | 38°F | 22°F | 2.93 | 8.5 |
| Putneyville 2 SE Dam | 39°F | 23°F | 3.49 | 9.1 |
| Raystown Headquarters | 40°F | 26°F | 3.13 | – |
| Raystown Lake 2 | 42°F | 27°F | 3.13 | – |
| Rector (3 mi SSW) | 43°F | 23°F | 3.61 | – |
| Rodale Research Center | 43°F | 25°F | 3.78 | – |
| Safe Harbor Dam | 44°F | 30°F | 3.82 | 3.6 |
| Salina (3 mi W) | 41°F | 26°F | 3.35 | 5.7 |
| Shawnee State Park | 40°F | 23°F | 3.15 | – |
| South Mountain | 40°F | 26°F | 3.82 | 5.2 |
| Springtown (1 mi NNE) | 42°F | 25°F | 4.59 | 6.4 |
| Stevenson Dam | 37°F | 22°F | 3.30 | 8.6 |
| Wolfsburg | 41°F | 24°F | 3.06 | 6.7 |
| York 3 SSW Pump Station | 45°F | 26°F | 3.52 | 3.3 |
Source: NOAA NCEI nClimDiv statewide normals; NOAA NCEI 1991-2020 monthly normals for each station.