Your Trip to Philadelphia: The Complete Guide SEE FULL GUIDE prev next Philadelphia International Airport Guide Hotels in Philadelphia Neighborhoods to Know Where to Stay Public Transportation 48-Hour Itinerary Day Trips From Philly Best Tours Top Things to Do Historic Attactions to Visit Free Things to Do Things to Do With Kids Hiking Near Philadelphia Camping Near Philadelphia Parks & Gardens Reading Terminal Market Museums in Philly The Best Live Music Venues The Best Food to Try Best Cheesesteaks Philly's Top Restaurants The Best Bars Nightlife Guide Breweries in Philadelphia Best Time to Visit Weather & Climate Your Trip to Philadelphia: The Complete Guide close Overview United States Pennsylvania Philadelphia Weather in Philadelphia: Climate, Seasons, and Average Monthly Temperature By Marla Cimini Marla Cimini Facebook Instagram LinkedIn Twitter La Salle University Marla Cimini is an award-winning writer who was born and raised in Philadelphia. She writes about travel, hotels, food, music, luxury and more. TripSavvy's editorial guidelines Fact checked by Jillian Dara Fact checked by Jillian Dara on 12/07/20 Instagram Emerson College Jillian Dara is a freelance travel writer and fact checker. Her work has appeared in Travel + Leisure, USA Today 10Best, Michelin Guide, Hemispheres, DuJour, and Jetsetter. TripSavvy's fact-checking on 12/07/20 Share Pin Email TripSavvy / Ellen Lindner Located in the northeastern United States, Philadelphia is a city that truly experiences the four seasons, with drastic differences in temperatures from summer to winter. Philadelphia is located in an area known as the Delaware Valley and is bordered by three rivers—the Delaware, the Schuylkill, and the Wissahickon—which all contribute to the city's high humidity, most noticeably in the warmer months. Throughout the year, temperatures can vary considerably. It’s common for winter to be very cold with January through March hovering between 20 and 40 degrees F (-7 to 4 degrees C) with snow and ice storms occurring fairly regularly. In summer temperatures usually reach the high 80s to the high 90s F (31 to 37 degrees C). Fast Climate Facts Hottest Month: July (avg. high 88 degrees F / 31.5 degrees C)Coldest Month: January (avg. high of 41 degrees F / 5 degrees C)Wettest Month: July (4.5 inches)Best Month for Swimming: August Most Humid Month: August (avg. 70 percent humidity) Summer in Philadelphia Muggy, hot, and humid are three words that you will hear often when you’re in Philadelphia during the summer months. It can be tough to deal with the high humidity. In fact, from June through August, many Philadelphia-area residents flock to the nearby New Jersey shore to escape the heat. It also rains a lot in the summer and the city tends to get late afternoon thunderstorms with heavy downpours, especially in July. Be sure to bring an umbrella and carry it with you if the forecast calls for precipitation. During the warmer months, many Philadelphia restaurants open their outdoor terraces and rooftop bars come alive. There are also a number of areas throughout the city where you can stroll around outside and enjoy the sunshine, such as Fairmount Park, Penn’s Landing and Spruce Street Harbor Park. What to pack: Philadelphia is very casual, especially in summer, so plan to be as comfortable as possible, especially if you are walking around outdoors. In addition to the umbrella, you may want to bring a light jacket as most restaurants, museums, and businesses are air-conditioned so you actually may be a bit chilly indoors. Average Temperatures by Month June: 74 degrees F / 23.3 degrees CJuly: 79 degrees F / 26.1 degrees CAugust: 77 degrees F / 25 degrees C Fall in Philadelphia In early September there’s a shift in temperature as the fall season brings a slight chill in the air. The leaves on the many trees around the city start changing colors and the temperature starts dropping. The air is usually noticeably less humid than the summer months, but the city still experiences several days of sudden heat (called “Indian Summer”) that usually occurs in mid-October. It’s ideal to explore the city in the fall, as the temperature is mild and it rains much less than the summertime. What to pack: Be sure to pack layers, a light jacket and perhaps include a medium-weight sweater or two (or perhaps a light scarf) in the mix. Average Temperatures by Month September: 70 degrees F / 21 degrees COctober: 58 degrees F / 14.4 degrees CNovember: 48 degrees F / 8.8 degrees C Winter in Philadelphia Philadelphia gets cold in the winter but brings a mix of sun and clouds, so even if the mercury drops and you need your heavy coat, there is still a chance of a sunny day. However, there are usually long stretches of grey, cloudy, windy days as well. What to pack: Think warmth! Bring all your winter layers and don’t expect to be outside very much. It’s recommended to wear a hat, scarf, gloves, and low boots or warm shoes. If snow is in the forecast, definitely bring your snow boots. Average Temperatures by Month December: 38 degrees F / 3.3 degrees CJanuary: 34 degrees F / 1.1 degree CFebruary: 35 degrees F / 1.6 degrees C Spring in Philadelphia Spring usually arrives slowly in Philadelphia and the city really doesn’t start to warm up until late April. In fact, the area is known to get heavy snowstorms in March. Although you will start to see flowers begin to bloom and buds start forming on the trees (adding some color to the barren landscape), locals treat spring like a milder winter… and expect lower temperatures for much of the season. What to pack: Spring is changeable! Be sure to pack carefully for the springtime, as anything can happen. Keep an eye on the weather forecast as you get nearer to your visit because this season can bring an unexpected snowstorm as well as higher than normal temperatures. To be on the safe side, pack layers, a heavy jacket, and a hat. It’s always a good idea to bring a raincoat or umbrella and rain boots during this time of year. Average Temperatures by Month March: 44 degrees F / 6.6 degrees CApril: 54 degrees F / 12.2 degrees CMay: 64 degrees F / 17.7 degrees C Average Monthly Temperature, Rainfall, and Daylight Hours Avg. Temp. Rainfall Daylight Hours January 34 F / -1 C 3.5 inches 9 hours February 35 F / -2 C 2.7 inches 10 hours March 44 F / 7 C 3.8 inches 11.5 hours April 54 F / 12 C 3.5 inches 13 hours May 64 F / 18 C 3.9 inches 14 hours June 74 F / 23 C 3.3 inches 14 hours July 79 F / 26 C 4.4 inches 14 hours August 77 F / 25 C 3.8 inches 13 hours September 70 F / 21 C 3.9 inches 12 hours October 58 F / 14 C 2.8 inches 11 hours November 48 F / 9 C 3.2 inches 9.5 hours December 38 F / 3 C 3.3 inches 9 hours Article Sources TripSavvy uses only high-quality, trusted sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial policy to learn more about how we keep our content accurate, reliable and trustworthy. Time and Date. "Climate & Weather Averages in Philadelphia." December 2020. Was this page helpful? Thanks for letting us know! Share Pin Email Tell us why! 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