Philadelphia (PA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Philadelphia.
Climate overview of Philadelphia
Philadelphia, Pennsylvania, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 31°C (88°F) in July, while winters cool to 5°C (41°F) in January.
The city receives considerable rain/snowfall, with around 1272 mm (50 in) annually. August is the wettest month. It has very warm summers and cold winters. July is the sunniest month, averaging 9.2 hours of sunshine per day.
Philadelphia Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Philadelphia - and find the best time to visit.
Monthly Temperature in Philadelphia
Depending on the time of the year, temperatures range from very warm to chilly in Philadelphia. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in July to a chilly 5°C (41°F) in the coolest month, January.
Nights vary from 22°C (72°F) in July to around -3°C (27°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Philadelphia
Philadelphia has a relatively rain/snowy climate with high precipitation levels, averaging 1272 mm (50 in) of rain/snowfall annually. Philadelphia offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month August (132 mm (5.2 in)) and the driest month November (78 mm (3.1 in)) is not too significant. For more details, please visit our Philadelphia Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Philadelphia
For those who appreciate different seasons, Philadelphia serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.2 hours of sunshine daily, and embrace the darker days in December, offering only 4.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Philadelphia
The mean water temperature over the year ranges from 5°C (41°F) in February to 25°C (77°F) in August.
Water temperature over the year
Humidity in Philadelphia by Month
The relative humidity is high throughout the year in Philadelphia.
The city experiences its highest humidity in September, reaching 72%. In April, the humidity drops to its lowest level at 61%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Philadelphia
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May
- Warmest weather: July and August
- Most sunshine: June and July
- Best for swimming: July, August and September.
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -3°C (27°F).
Frequently asked questions about the climate in Philadelphia
What is the best time to visit Philadelphia?
May typically offers the most optimal weather in Philadelphia. In contrast, January, February and December tend to have less optimal conditions. Philadelphia has very warm summers and cold winters.
What temperatures can I expect in Philadelphia?
Daytime highs range from 5°C (41°F) in January to 31°C (88°F) in July. Nighttime lows range from -3°C (27°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Philadelphia get?
Annual rainfall is around 1272 mm (50 in). August is the wettest month with 132 mm (5.2 in), while November is the driest with 78 mm (3.1 in).
How sunny is Philadelphia?
Philadelphia receives around 2,500 hours of sunshine per year. July is the sunniest month with 275 hours, while December is the cloudiest with just 140 hours. Overall, Philadelphia enjoys abundant sunshine.
Philadelphia 3-Day Forecast
Philadelphia (PA) 3-Day Forecast
Philadelphia on the map
Philadelphia is highlighted - select any city to see its climate.
Popular this month
Where to go in July - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.