Counties in Pennsylvania by average annual temperature

Philadelphia County had the highest average annual temperature of 67 counties in 2017, at 56.6 °F. Potter County had the lowest, at 46.7 °F. The median was 50.9 °F and the figure for Pennsylvania was 50.6 °F. Source: NOAA National Centers for Environmental Information.

Keep it in a collection in your library.
Lowest46.7Potter County
Median50.967 counties
Pennsylvania50.6History

Map of counties, 2017

Adams County: 53.8 °FAllegheny County: 53.1 °FArmstrong County: 51.3 °FBeaver County: 52.2 °FBedford County: 51.8 °FBerks County: 53.5 °FBlair County: 50.5 °FBradford County: 48.5 °FBucks County: 54.2 °FButler County: 50.9 °FCambria County: 48.9 °FCameron County: 47.9 °FCarbon County: 49 °FCentre County: 49.5 °FChester County: 54.6 °FClarion County: 49.9 °FClearfield County: 48.7 °FClinton County: 49.2 °FColumbia County: 50.2 °FCrawford County: 49.6 °FCumberland County: 53.6 °FDauphin County: 52.9 °FDelaware County: 56.2 °FElk County: 48.3 °FErie County: 49.5 °FFayette County: 52 °FForest County: 49 °FFranklin County: 53.4 °FFulton County: 52.7 °FGreene County: 53.2 °FHuntingdon County: 51.9 °FIndiana County: 50.6 °FJefferson County: 49.1 °FJuniata County: 52.4 °FLackawanna County: 48.5 °FLancaster County: 54.2 °FLawrence County: 51.5 °FLebanon County: 53.2 °FLehigh County: 53.2 °FLuzerne County: 48.8 °FLycoming County: 49.5 °FMcKean County: 47.4 °FMercer County: 50.4 °FMifflin County: 51.7 °FMonroe County: 48.6 °FMontgomery County: 55 °FMontour County: 51.3 °FNorthampton County: 52.3 °FNorthumberland County: 51.3 °FPerry County: 52.7 °FPhiladelphia County: 56.6 °FPike County: 48.5 °FPotter County: 46.7 °FSchuylkill County: 50.6 °FSnyder County: 51.6 °FSomerset County: 49.7 °FSullivan County: 46.9 °FSusquehanna County: 47.7 °FTioga County: 47.4 °FUnion County: 51 °FVenango County: 50 °FWarren County: 48.4 °FWashington County: 52.8 °FWayne County: 47.7 °FWestmoreland County: 52.1 °FWyoming County: 49 °FYork County: 54.1 °F
  • Under 49
  • 49 to 50
  • 50 to 51
  • 51 to 52
  • 52 to 53
  • 53 and over
°F, 2017. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Philadelphia County: 56.6 °FPhiladelphia County56.6Delaware County: 56.2 °FDelaware County56.2Montgomery County: 55 °FMontgomery County55Chester County: 54.6 °FChester County54.6Bucks County: 54.2 °FBucks County54.2Lancaster County: 54.2 °FLancaster County54.2York County: 54.1 °FYork County54.1Adams County: 53.8 °FAdams County53.8Cumberland County: 53.6 °FCumberland County53.6Berks County: 53.5 °FBerks County53.5Franklin County: 53.4 °FFranklin County53.4Greene County: 53.2 °FGreene County53.2Lebanon County: 53.2 °FLebanon County53.2Lehigh County: 53.2 °FLehigh County53.2Allegheny County: 53.1 °FAllegheny County53.1Dauphin County: 52.9 °FDauphin County52.9Washington County: 52.8 °FWashington County52.8Fulton County: 52.7 °FFulton County52.7Perry County: 52.7 °FPerry County52.7Juniata County: 52.4 °FJuniata County52.4Northampton County: 52.3 °FNorthampton County52.3Beaver County: 52.2 °FBeaver County52.2Westmoreland County: 52.1 °FWestmoreland County52.1Fayette County: 52 °FFayette County52Huntingdon County: 51.9 °FHuntingdon County51.9Bedford County: 51.8 °FBedford County51.8Mifflin County: 51.7 °FMifflin County51.7Snyder County: 51.6 °FSnyder County51.6Lawrence County: 51.5 °FLawrence County51.5Armstrong County: 51.3 °FArmstrong County51.3Montour County: 51.3 °FMontour County51.3Northumberland County: 51.3 °FNorthumberland County51.3Union County: 51 °FUnion County51Butler County: 50.9 °FButler County50.9Indiana County: 50.6 °FIndiana County50.6Schuylkill County: 50.6 °FSchuylkill County50.6Blair County: 50.5 °FBlair County50.5Mercer County: 50.4 °FMercer County50.4Columbia County: 50.2 °FColumbia County50.2Venango County: 50 °FVenango County50Philadelphia County: 56.6 °FPhiladelphia County56.6Delaware County: 56.2 °FDelaware County56.2Montgomery County: 55 °FMontgomery County55Chester County: 54.6 °FChester County54.6Bucks County: 54.2 °FBucks County54.2Lancaster County: 54.2 °FLancaster County54.2York County: 54.1 °FYork County54.1Adams County: 53.8 °FAdams County53.8Cumberland County: 53.6 °FCumberland County53.6Berks County: 53.5 °FBerks County53.5Franklin County: 53.4 °FFranklin County53.4Greene County: 53.2 °FGreene County53.2Lebanon County: 53.2 °FLebanon County53.2Lehigh County: 53.2 °FLehigh County53.2Allegheny County: 53.1 °FAllegheny County53.1Dauphin County: 52.9 °FDauphin County52.9Washington County: 52.8 °FWashington County52.8Fulton County: 52.7 °FFulton County52.7Perry County: 52.7 °FPerry County52.7Juniata County: 52.4 °FJuniata County52.4Northampton County: 52.3 °FNorthampton County52.3Beaver County: 52.2 °FBeaver County52.2Westmoreland County: 52.1 °FWestmoreland County52.1Fayette County: 52 °FFayette County52Huntingdon County: 51.9 °FHuntingdon County51.9Bedford County: 51.8 °FBedford County51.8Mifflin County: 51.7 °FMifflin County51.7Snyder County: 51.6 °FSnyder County51.6Lawrence County: 51.5 °FLawrence County51.5Armstrong County: 51.3 °FArmstrong County51.3Montour County: 51.3 °FMontour County51.3Northumberland County: 51.3 °FNorthumberland County51.3Union County: 51 °FUnion County51Butler County: 50.9 °FButler County50.9Indiana County: 50.6 °FIndiana County50.6Schuylkill County: 50.6 °FSchuylkill County50.6Blair County: 50.5 °FBlair County50.5Mercer County: 50.4 °FMercer County50.4Columbia County: 50.2 °FColumbia County50.2Venango County: 50 °FVenango County50
°F. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12.

Full ranking

RankCounties2017
°F
Change on 2016
1Philadelphia County56.6-0.7%
2Delaware County56.2-0.5%
3Montgomery County55-0.7%
4Chester County54.60%
5Bucks County54.2-0.6%
5Lancaster County54.2-0.2%
7York County54.10%
8Adams County53.80%
9Cumberland County53.60%
10Berks County53.5-0.6%
11Franklin County53.4+0.2%
12Greene County53.2-0.4%
12Lebanon County53.2-0.6%
12Lehigh County53.2-0.7%
15Allegheny County53.1-0.7%
16Dauphin County52.9-0.2%
17Washington County52.8-0.9%
18Fulton County52.70%
18Perry County52.7-0.4%
20Juniata County52.4-0.9%
21Northampton County52.3-0.9%
22Beaver County52.2-0.6%
23Westmoreland County52.1-0.4%
24Fayette County52-0.2%
25Huntingdon County51.9-0.6%
26Bedford County51.8+0.2%
27Mifflin County51.7-1%
28Snyder County51.6-1%
29Lawrence County51.5-0.8%
30Armstrong County51.3-0.4%
30Montour County51.3-1%
30Northumberland County51.3-1%
33Union County51-1.2%
34Butler County50.9-0.4%
35Indiana County50.6-0.4%
35Schuylkill County50.6-0.8%
37Blair County50.5-1%
38Mercer County50.4-0.4%
39Columbia County50.2-1%
40Venango County500%
41Clarion County49.9-0.2%
42Somerset County49.70%
43Crawford County49.6-0.6%
44Centre County49.5-1.6%
44Erie County49.5-1%
44Lycoming County49.5-1.4%
47Clinton County49.2-1.2%
48Jefferson County49.1-1%
49Carbon County49-1.4%
49Forest County49+0.2%
49Wyoming County49-0.8%
52Cambria County48.9-0.8%
53Luzerne County48.8-1.2%
54Clearfield County48.7-1.8%
55Monroe County48.6-2%
56Bradford County48.5-0.6%
56Lackawanna County48.5-0.8%
56Pike County48.5-1%
59Warren County48.40%
60Elk County48.3-0.8%
61Cameron County47.9-1%
62Susquehanna County47.7-1%
62Wayne County47.7-0.6%
64McKean County47.4-0.4%
64Tioga County47.4-1%
66Sullivan County46.9-1.3%
67Potter County46.7-1.1%

Other periods

About this ranking

Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.

Values are area averages, so a county with mountains and valleys has one value for very different local climates. NOAA revises the last two years every month.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

NOAA National Centers for Environmental Information. (2026). NOAA Climate at a Glance, January to December average temperature, counties (Counties in Pennsylvania by average annual temperature, 2017) [Data set]. Retrieved October 12, 2026, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping

MLA 9

NOAA Climate at a Glance, January to December average temperature, counties, Counties in Pennsylvania by average annual temperature, 2017. NOAA National Centers for Environmental Information, 6 Oct. 2026, https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Invokely, https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2017. Accessed 12 Oct. 2026.

Chicago (author-date)

NOAA National Centers for Environmental Information. 2026. NOAA Climate at a Glance, January to December average temperature, counties. Counties in Pennsylvania by average annual temperature, 2017. Dataset. Accessed October 12, 2026. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Also distributed by Invokely, https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2017.

Harvard

NOAA National Centers for Environmental Information (2026) NOAA Climate at a Glance, January to December average temperature, counties, Counties in Pennsylvania by average annual temperature, 2017 [Dataset]. Available at: https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping, via Invokely: https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{noaa_counties_in_pennsylvania_by_2017,
  author = {{NOAA National Centers for Environmental Information}},
  title = {{NOAA Climate at a Glance, January to December average temperature, counties: Counties in Pennsylvania by average annual temperature, 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2017. Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - NOAA National Centers for Environmental Information
TI  - NOAA Climate at a Glance, January to December average temperature, counties: Counties in Pennsylvania by average annual temperature, 2017
PY  - 2026
DA  - 2026/10/06
PB  - NOAA National Centers for Environmental Information
DB  - Invokely
UR  - https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping
L2  - https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2017.
N1  - Publisher attribution: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
ER  - 
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Rank Counties in Pennsylvania by average annual temperature using official data, and cite the source.
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Questions

Which county has the highest average annual temperature?

Philadelphia County, with 56.6 °F in 2017, according to NOAA National Centers for Environmental Information.

Which county has the lowest average annual temperature?

Potter County, with 46.7 °F in 2017.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12.

Average annual temperature: other rankings

Counties in Pennsylvania: more rankings