The three warmest cities in Pennsylvania are Chester, Philadelphia, and Cheltenham Township.
In this article I’m going to share with you my ranking of the warmest places in Pennsylvania.
I created my list by researching data provided by the National Oceanic and Atmospheric Administration and other climate data providers.
Below I’m listing the top 10 warmest places in Pennsylvania that have the highest average yearly temperatures. Later in the article I share a table with 50 most populous cities, townships, and boroughs in Pennsylvania.
Top 10 Warmest Cities in Pennsylvania
Here are the top 10 warmest places in Pennsylvania ranked by their daily mean temperature.
1. Chester – daily mean temperature of 56.35 °F
Chester is a city of 33,000 people. It’s located within the Philadelphia Metropolitan Area. It’s the warmest city in Pennsylvania, though its average temperature is only 0.1 °F higher than in downtown Philadelphia. In the winter, Chester sees average high temperatures of 41-45 °F. They drop to 27-31 °F at night. In the summer, the weather is warm to hot, with daytime temperatures of 83-87 °F and lows of 65-70 °F.
2. Philadelphia – daily mean temperature of 56.25 °F
Philadelphia, the largest city of Pennsylvania, is the second warmest city of the state. According to climate data from the National Oceanic and Atmospheric Administration, Philadelphia sees average temperatures of 41-46 °F during the day and 26-31 °F at night between December and February. In the summer, between June and August, Philadelphia enjoys high temperatures of 83-88 °F and lows of 64-70 °F. The city has 2,498 sunshine hours a year. It gets 44 inches of yearly precipitation, spread over 121 days. Snow falls on average 12 days a year, reaching 23 inches of annual snowfall.
For more information, read my article on the number of sunny days in Philadelphia.
3. Cheltenham Township – daily mean temperature of 55.65 °F
Cheltenham Township is a township located within the same metropolitan area of Philadelphia. It has slightly cooler weather, with temperatures about a degree lower than in the first two cities.
4. Harrisburg – daily mean temperature of 55.2 °F
Harrisburg, the state capital of Pennsylvania, is situated on the Susquehanna River, 107 miles northwest of Philadelphia. It’s the only city on this list not located close to Philadelphia. Harrisburg enjoys more sunshine than the largest city of the state, reaching 2,613 sunshine hours a year. It features similar warm weather in the summer as Philadelphia, with slightly cooler nights. Winter temperatures during the day are between 40-44 °F.
5. Norristown – daily mean temperature of 54.95 °F
Norristown is a municipality located about 19 miles from downtown Philadelphia. It has the warmest winter daytime temperatures out of all cities in this ranking, with temperatures reaching 42-46 °F. It has much colder nights than Philadelphia, though, at 23-28 °F compared to 26-31 °F in Philadelphia.
6. Bristol Township – daily mean temperature of 54.65 °F
Bristol Township is situated 25 miles northeast of Philadelphia, on the border with New Jersey. It has very similar temperatures year round, with nights that are colder by 3-4 degrees, particularly in the summer. If you want to live close to Philadelphia in a place that gets warm summers with cooler nights, Bristol Township may provide the best middle ground.
7. Upper Merion Township – daily mean temperature of 54.5 °F
Upper Merion Township is located across the Schuylkill River from Norristown. According to climate data gathered in the village of King of Prussia, the township experiences very cold air temperatures on winter nights, dropping to 22 °F in the coldest month (January).
8. Phoenixville – daily mean temperature of 54.4 °F
Phoenixville is a borough of about 19,000 people, located on the outer edges of the Philadelphia Metropolitan Area. As other cities in this ranking, it has almost exactly the same daytime temperatures ranging from 41 to 45 °F in the winter and 83 to 88 °F in the summer. The difference lies in the average low temperatures which are between 23-27 °F in the winter and 61-66 °F in the summer.
9. Falls Township – daily mean temperature of 54.3 °F
Falls Township is a suburban Philadelphia township, located on the Delaware River, near the border with New Jersey and the city of Trenton, NJ. The weather in Falls Township is similar to Phoenixville, with summer days cooler by about a degree and winter nights warmer by two degrees.
10. Lower Southampton Township – daily mean temperature of 54.2 °F
The tenth warmest place in Pennsylvania is also located in the metropolitan area of Philadelphia. It has the mildest summers on this list, with average highs of 82-86 °F and average lows of 61-66 °F. The nighttime temperatures are up to 4 degrees lower than in Chester and Philadelphia.
50 Biggest Cities in Pennsylvania Ranked by Daily Mean Temperature
I created the table below by researching data for the most populous municipalities in Pennsylvania. When I couldn’t find data for a given city, I moved on to another. While the list includes 50 cities, townships, and boroughs, some of the more populated places may be missing because there was no data for them. Please check the closest geographically city then.
|City||Average high temperature (°F)||Average low temperature (°F)||Daily mean temperature (°F)|
|Upper Merion Township||65||44||54.5|
|Lower Southampton Township||63.8||44.6||54.2|
|Lower Makefield Township||64||44.3||54.15|
|Middle Smithfield Township||59.4||37.6||48.5|
Check the Warmest Cities in Neighboring States
If you’re interested in learning about the warmest cities in states neighboring Pennsylvania, check out the following articles:
- What Are the Warmest Cities in Delaware?
- What Are the Warmest Cities in Maryland?
- What Are the Warmest Cities in New Jersey?
- What Are the Warmest Cities in New York?
- What Are the Warmest Cities in Ohio?
- What Are the Warmest Cities in West Virginia?
Frequently Asked Questions
The warmest part of Pennsylvania is the southeastern corner of the state. This includes Philadelphia and nearby cities and townships like Chester and Cheltenham Township.
Southeast Pennsylvania, and particularly Philadelphia counties, gets the least snowfall. Philadelphia gets on average about 23 inches of snow a year, spread over 12 days.
Pennsylvania is not warm year round. Even in the warmest cities in the state, winters are cool to cold, with an average high temperature of 40-45 °F and an average low temperature of 26-31 °F.
Norristown gets the highest winter temperatures during the day, reaching 42-46 °F between December and February. It has much colder nights than Philadelphia, though, which sees temperatures of 41-46 °F and nights of 26-31 °F (compared to 23-28 °F in Norristown).
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