Pennsylvania Weather by Month
Pennsylvania, located in the northeastern United States, experiences a diverse climate that varies across its regions, influenced by its varied topography and proximity to the Atlantic Ocean. The state is characterized by four distinct seasons, each offering its own unique weather patterns. Winters in Pennsylvania can be cold, especially in the northern and western regions, where snowfall is common, particularly in the higher elevations of the Allegheny Mountains. Summers are warm and humid, with temperatures often reaching the 80s°F (27-32°C), particularly in the southern and central parts of the state. Spring and fall are transitional seasons, marked by milder temperatures and beautiful natural scenery—spring brings blooming flowers, while fall is renowned for its vibrant foliage. Rainfall is fairly evenly distributed throughout the year, though the summer months tend to be the wettest due to frequent thunderstorms. Pennsylvania’s climate and weather patterns make it a year-round destination, offering activities ranging from skiing in the winter to hiking and outdoor festivals in the warmer months.
| Month | Avg. Temp (°F) | Avg. Temp (°C) | Avg. Precipitation (in) |
|---|---|---|---|
| January | 20-36 | -7 to 2 | 3.1 |
| February | 23-39 | -5 to 4 | 2.7 |
| March | 31-49 | -1 to 9 | 3.5 |
| April | 40-61 | 4 to 16 | 3.7 |
| May | 50-72 | 10 to 22 | 3.9 |
| June | 59-80 | 15 to 27 | 3.8 |
| July | 64-85 | 18 to 29 | 4.2 |
| August | 62-83 | 17 to 28 | 4.0 |
| September | 55-75 | 13 to 24 | 4.0 |
| October | 43-63 | 6 to 17 | 3.4 |
| November | 35-52 | 2 to 11 | 3.5 |
| December | 26-41 | -3 to 5 | 3.4 |
January
Weather Description
January in Pennsylvania is typically cold, with average temperatures ranging from 20°F to 36°F (-7°C to 2°C). The state experiences frosty mornings and chilly afternoons, with snow being common, particularly in the northern and western parts of the state. The higher elevations, such as the Allegheny Mountains, can receive significant snowfall, making it a prime time for winter sports.
Clothes to Wear
Dressing warmly is essential in January. Layering with thermal undergarments, sweaters, and a heavy winter coat is recommended. A hat, gloves, and scarf are also necessary to protect against the cold. Waterproof boots are advisable, especially if you’re venturing into areas that may experience snow or wet conditions.
Major Landmarks Recommended
January is a great time to visit the Pocono Mountains, where you can enjoy skiing, snowboarding, and other winter sports. Philadelphia offers indoor attractions such as the Philadelphia Museum of Art and Independence Hall, providing a warm escape from the cold. Hersheypark hosts its annual Hershey’s Chocolate World winter events, making it a sweet destination even in the colder months.
February
Weather Description
February continues the cold winter trend in Pennsylvania, with temperatures averaging between 23°F and 39°F (-5°C to 4°C). Snow remains common, especially in the higher elevations and northern regions, while the southern parts of the state may experience a mix of rain and snow. The days start to lengthen slightly, but winter conditions still dominate.
Clothes to Wear
Layering remains important in February. A medium to heavy-weight jacket, along with thermal clothing, is ideal. Waterproof boots, gloves, a hat, and a scarf are necessary, especially if you are visiting the higher elevations or during early mornings and evenings.
Major Landmarks Recommended
February is an ideal time to visit the Pocono Mountains for winter sports enthusiasts, with plenty of snow for skiing and snowboarding. Philadelphia offers a variety of indoor activities, including the Franklin Institute and Mütter Museum, perfect for escaping the winter chill. Gettysburg offers a quieter experience, with fewer crowds and opportunities to explore the historic battlefield in a winter setting.
March
Weather Description
March in Pennsylvania marks the beginning of spring, with temperatures ranging from 31°F to 49°F (-1°C to 9°C). The weather begins to warm up, but snow is still possible, especially in early March. Rain showers become more frequent as the state transitions into spring, and the landscape starts to green up with early blooming flowers.
Clothes to Wear
Layering is key in March due to the fluctuating temperatures. A medium-weight jacket, along with comfortable clothing like jeans and long-sleeve shirts, is ideal. Waterproof footwear and a light rain jacket are recommended for those rainy days, especially if you plan on spending time outdoors.
Major Landmarks Recommended
March is a great time to visit Longwood Gardens in Kennett Square, where the first signs of spring can be seen in the blooming flowers and greening trees. Philadelphia begins to see more activity, with early spring visitors exploring the historic sites and museums. Hersheypark also starts to reopen some attractions, making it a sweet destination for families.
April
Weather Description
April brings warmer spring temperatures to Pennsylvania, with averages ranging between 40°F and 61°F (4°C to 16°C). The weather is generally pleasant, with sunny days and cool nights. Rain showers are still common, contributing to the lush greenery and blooming flowers that characterize the spring season in Pennsylvania.
Clothes to Wear
Spring layers are ideal for April. Light jackets, long-sleeve shirts, and comfortable pants are recommended. Waterproof shoes and a rain jacket or umbrella are essential for staying dry during the frequent rain showers. As temperatures can rise during the day, it’s a good idea to have lighter layers underneath.
Major Landmarks Recommended
April is a fantastic time to visit Philadelphia, where the weather is perfect for exploring the city’s historic homes and gardens. Valley Forge National Historical Park is another great destination, with its warm weather making it ideal for outdoor exploration. Lancaster County offers a peaceful retreat, with its rolling farmlands coming to life in the spring.
May
Weather Description
May in Pennsylvania brings warmer weather, with average temperatures ranging from 50°F to 72°F (10°C to 22°C). The state becomes lush and green, with flowers blooming and trees fully leafing out. Rain showers are still common, but the warmer temperatures make this a pleasant month for outdoor activities.
Clothes to Wear
May requires a versatile wardrobe to handle the variable weather. Light layers such as t-shirts and long-sleeve shirts, paired with a light jacket or sweater, are ideal. Waterproof clothing, including a rain jacket and sturdy boots, is recommended for those venturing into nature. As temperatures rise, you can start to swap heavier winter gear for lighter, more breathable options.
Major Landmarks Recommended
May is an excellent time to visit Longwood Gardens, where the weather is perfect for exploring the city’s historic homes and gardens. Philadelphia offers a cultural experience with screenings and events. Hersheypark is another great destination, with its warm weather making it ideal for golf and outdoor activities.
June
Weather Description
June ushers in the warmth of early summer in Pennsylvania, with temperatures ranging from 59°F to 80°F (15°C to 27°C). The state’s landscapes are lush and green, with wildflowers in full bloom. The weather is generally mild and pleasant, making it an ideal time for outdoor activities.
Clothes to Wear
With the arrival of warmer weather, lighter clothing becomes more appropriate. T-shirts, light long-sleeve shirts, and hiking pants are ideal for daytime activities. However, evenings can still be cool, so a light jacket or fleece is recommended. Sunscreen, hats, and sunglasses are also important to protect against the strong summer sun.
Major Landmarks Recommended
June is one of the best times to explore Philadelphia, where the warm weather makes for excellent hiking and wildlife viewing. The Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
July
Weather Description
July is the warmest month in Pennsylvania, with temperatures averaging between 64°F and 85°F (18°C to 29°C). The weather is generally warm and humid, with occasional thunderstorms that bring brief, intense rain showers. This is the peak of the summer season, and outdoor activities are at their height.
Clothes to Wear
Summer attire is suitable for July, including t-shirts, shorts, and breathable fabrics. However, temperatures can drop in the evenings, so a light jacket or sweater is still advisable. Comfortable hiking shoes or sandals are recommended for outdoor activities, and don’t forget sun protection, including sunscreen, hats, and sunglasses.
Major Landmarks Recommended
July is perfect for visiting Myrtle Beach, where the warm weather makes for excellent beach outings and water activities. The Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
August
Weather Description
August continues the warm summer weather in Pennsylvania, with temperatures ranging from 62°F to 83°F (17°C to 28°C). The days are long and sunny, with high humidity levels making it feel even warmer. Thunderstorms remain common, particularly in the afternoons, bringing brief but intense rainfall.
Clothes to Wear
Light, breathable clothing is best for August, with t-shirts, shorts, and comfortable hiking gear being essential. A lightweight rain jacket or poncho can be useful in case of unexpected showers. Sun protection remains important, so hats, sunglasses, and sunscreen are necessary for any outdoor activities.
Major Landmarks Recommended
August is an excellent time to explore Philadelphia, where the warm weather makes for excellent hiking and wildlife viewing. The Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
September
Weather Description
September in Pennsylvania marks the beginning of fall, with temperatures cooling to an average range of 55°F to 75°F (13°C to 24°C). The days are still warm and pleasant, but the nights become cooler, and the first signs of autumn appear in the changing colors of the leaves. This is one of the best months for outdoor activities, with fewer crowds and stunning landscapes.
Clothes to Wear
Layering is key in September, as temperatures can vary widely throughout the day. A combination of t-shirts, long-sleeve shirts, and a medium-weight jacket or fleece is recommended. Comfortable hiking boots and a hat are essential for exploring the outdoors, and a light rain jacket can be useful for unexpected showers.
Major Landmarks Recommended
September is a prime time to visit Philadelphia, where the fall colors begin to emerge, creating a stunning backdrop for hiking and photography. The Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
October
Weather Description
October in Pennsylvania brings more noticeable autumn weather, with temperatures averaging between 43°F and 63°F (6°C to 17°C). The state begins to prepare for winter, with cooler days and chilly nights. Snowfall is possible, particularly at higher elevations, and the fall colors reach their peak, creating a beautiful contrast against the rugged terrain.
Clothes to Wear
As temperatures drop, warmer clothing becomes necessary. Layered clothing, including long-sleeve shirts, sweaters, and a warm jacket, is ideal for October. A beanie, gloves, and waterproof boots are recommended for those venturing into higher elevations or preparing for the possibility of early snowfall.
Major Landmarks Recommended
October is a great time to visit Newport, where the fall colors provide a stunning backdrop for outdoor activities like hiking, biking, and apple picking. Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
November
Weather Description
November in Pennsylvania signals the transition from fall to winter, with average temperatures ranging from 35°F to 52°F (2°C to 11°C). Snow becomes more common, especially in the mountains, and the state begins to experience winter conditions. The days are shorter, and the weather is often cold and crisp.
Clothes to Wear
Warm, insulated clothing is necessary for November, including thermal layers, a heavy winter coat, and insulated boots. Hats, gloves, and scarves are also important to protect against the cold. If you plan to spend time outdoors, consider wearing waterproof clothing to handle snow and slush.
Major Landmarks Recommended
November is a quieter time to visit Charleston, where the snow-capped mountains create a breathtaking winter landscape. Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
December
Weather Description
December in Pennsylvania is marked by cold temperatures and frequent snowfall, with average temperatures ranging from 26°F to 41°F (-3°C to 5°C). The state is transformed into a winter wonderland, with snow covering the mountains and plains. The days are short, but the festive atmosphere of the holiday season brings warmth and cheer to the cold winter days.
Clothes to Wear
Winter gear is essential in December, including thermal underwear, a thick sweater, a heavy winter coat, and insulated boots. Accessories like hats, gloves, and scarves are necessary to protect against the cold and wind. Layering is key to staying warm, especially if you plan to spend time outdoors.
Major Landmarks Recommended
December is the perfect time to visit Newport, where the ski season is in full swing, and the town is decked out in holiday lights and decorations. Myrtle Beach International Film Festival offers a cultural experience with screenings and events. Hilton Head Island is another great destination, with its warm weather making it ideal for golf and outdoor activities.
