Counties in Pennsylvania by average annual temperature

Philadelphia County had the highest average annual temperature of 67 counties in 2024, at 57.6 °F. Sullivan County had the lowest, at 48 °F. The median was 52.4 °F and the figure for Pennsylvania was 52.1 °F. Source: NOAA National Centers for Environmental Information.

Highest57.6Philadelphia County

Lowest48Sullivan County

Median52.467 counties

Pennsylvania52.1History

Map of counties, 2024

Under 50
50 to 51
51 to 52
52 to 54
54 to 55
55 and over

°F, 2024. 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, 2024

°F. Source: NOAA NCEI, NOAA Climate at a Glance, January to December average temperature, counties. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2024 °F	Change on 2023
1	Philadelphia County	57.6	+0.7%
2	Delaware County	57.1	+0.5%
3	Montgomery County	56	+0.7%
4	Allegheny County	55.5	+3.2%
4	York County	55.5	+0.4%
6	Chester County	55.2	+0.4%
6	Lancaster County	55.2	+0.4%
8	Adams County	55.1	+0.5%
8	Cumberland County	55.1	+0.5%
10	Bucks County	55	+0.5%
11	Franklin County	54.8	+0.9%
11	Washington County	54.8	+3.2%
13	Dauphin County	54.5	+0.4%
13	Greene County	54.5	+2.8%
15	Fulton County	54.4	+1.1%
16	Lebanon County	54.3	+0.4%
16	Perry County	54.3	+0.6%
18	Berks County	54.2	+0.2%
19	Westmoreland County	54.1	+2.3%
20	Lehigh County	53.9	+0.6%
21	Beaver County	53.8	+2.9%
21	Juniata County	53.8	+0.7%
23	Huntingdon County	53.6	+1.3%
24	Bedford County	53.4	+1.3%
25	Fayette County	53.3	+2.5%
26	Northampton County	53.2	+0.4%
27	Mifflin County	53.1	+0.8%
27	Snyder County	53.1	+0.6%
29	Lawrence County	52.7	+1.5%
29	Northumberland County	52.7	+0.6%
31	Armstrong County	52.6	+1.7%
31	Butler County	52.6	+1.5%
33	Montour County	52.5	+0.4%
34	Union County	52.4	+0.6%
35	Blair County	52.3	+1.4%
36	Mercer County	52	+2%
37	Indiana County	51.9	+1.8%
38	Schuylkill County	51.8	+0.6%
39	Centre County	51.4	+1%
39	Columbia County	51.4	+0.2%
39	Erie County	51.4	+3%
42	Crawford County	51.3	+2.8%
43	Clarion County	51.2	+1.2%
43	Jefferson County	51.2	+1.6%
43	Venango County	51.2	+1.6%
46	Clearfield County	50.9	+1.6%
47	Clinton County	50.8	+0.8%
47	Somerset County	50.8	+1.8%
49	Lycoming County	50.7	+0.4%
50	Cambria County	50.6	+1.8%
50	Carbon County	50.6	+0.6%
52	Luzerne County	50.4	+0.4%
53	Elk County	50.3	+1.2%
53	Wyoming County	50.3	0%
55	Forest County	50.2	+1.2%
56	Cameron County	50.1	+1.2%
57	Lackawanna County	49.9	+0.2%
57	Monroe County	49.9	+0.2%
59	Pike County	49.7	+0.2%
59	Warren County	49.7	+1.4%
61	McKean County	49.6	+1.4%
62	Bradford County	49.5	+0.4%
63	Susquehanna County	49.3	-0.2%
64	Wayne County	49	-0.2%
65	Potter County	48.8	+1%
65	Tioga County	48.8	+0.4%
67	Sullivan County	48	0%

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, 2024) [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, 2024. 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=2024. 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, 2024. 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=2024.

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, 2024 [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=2024 (Accessed: 12 October 2026).

BibTeX

@misc{noaa_counties_in_pennsylvania_by_2024,
  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, 2024}},
  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=2024. 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, 2024
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=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/average-annual-temperature/pennsylvania-counties?period=2024.
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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Questions

Which county has the highest average annual temperature?

Philadelphia County, with 57.6 °F in 2024, according to NOAA National Centers for Environmental Information.

Which county has the lowest average annual temperature?

Sullivan County, with 48 °F in 2024.

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.