Philadelphia Weather Forecast

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Philadelphia Weather Forecast

Weather in Philadelphia is similar to Washington, New York, Pittsburgh and Boston is highlighted by the four seasons.

Residents and tourists enjoy a variety of activities year-round, from outdoor festivals in the summer to colorful fall foliage, winter sports, and springtime blossoms.

The city’s relatively mild climate, influenced by its proximity to the Delaware River and the Atlantic Ocean which keep temperatures relatively mild and prevents extreme temperature fluctuations. It also contributes to the city’s humidity levels.

Phily’s large urban area creates a heat island effect and summers in the city can be hot.

Philadelphia 7 Day Forecast:

PHILADELPHIA WEATHER

Seasonal Weather in Philadelphia

Here’s a detailed overview of the average weather conditions in Philadelphia, Pennsylvania, for each season, including temperature ranges, humidity, UV reports, precipitation, sunshine days, pollution, storms, winds, and the frequency of days with temperatures over 90 degrees Fahrenheit:

Winter (December to February):

  • Temperature Range: Winters in Philadelphia are cold. Highs typically range from 44°F (7°C) to 39°F (4°C), while nighttime lows range from 27°F (-3°C) to 22°F (-6°C).
  • Humidity: Humidity levels are lower in winter, resulting in drier and colder conditions.
  • UV Reports: UV levels are low in winter, but sun protection is still advisable on sunny days.
  • Precipitation: Winter is relatively dry in Philadelphia, with average monthly rainfall ranging from minimal to around 2 inches. Snowfall is common.
  • Sunshine Days: Philadelphia experiences a mix of sunny and cloudy days in winter, with occasional snowfall.
  • Air Quality/Pollution: Air quality is generally good in the winter, with minimal pollution.
  • Storms: Significant winter storms with heavy snowfall can occur, particularly in January and February.
  • Winds: Cold winds can make winter conditions feel colder, especially near the Delaware River.
  • Days Over 90 Degrees: Days over 90 degrees Fahrenheit are extremely rare in winter in Philadelphia.
  • Philadelphia’s weather offers residents and tourists a wide range of experiences throughout the year, from mild springs and hot summers to colorful autumns and chilly winters.

Spring (March to May):

  • Temperature Range: Spring in Philadelphia is mild and gradually warms up. Highs typically range from 53°F (12°C) in March to 72°F (22°C) in May, while nighttime lows range from 33°F (1°C) to 53°F (12°C).
  • Humidity: Humidity levels are moderate in spring, creating comfortable conditions.
  • UV Reports: UV levels are generally low in spring, but sun protection is advisable on sunny days.
  • Precipitation: Spring is moderately wet, with average monthly rainfall ranging from 3 to 4 inches.
  • Sunshine Days: Philadelphia experiences a mix of sunny and overcast days in spring.
  • Air Quality/Pollution: Air quality is generally good in spring, with minimal pollution.
  • Storms: Spring can bring occasional rain showers and, at times, thunderstorms, but severe storms are infrequent.
    Winds: Breezy conditions may occur.
  • Days Over 90 Degrees: Days over 90 degrees Fahrenheit are rare in spring, with mild and comfortable temperatures.

Summer (June to August):

  • Temperature Range: Summers in Philadelphia are warm to hot. Highs typically range from 82°F (28°C) to 87°F (31°C), with nighttime lows between 63°F (17°C) and 68°F (20°C).
  • Humidity: Humidity levels are moderate to high during the summer, contributing to warm and muggy conditions.
  • UV Reports: UV levels are high in summer, requiring sun protection.
  • Precipitation: Summer is the wettest season in Philadelphia, with average monthly rainfall ranging from 3 to 4 inches. Afternoon thunderstorms are common.
  • Sunshine Days: While there are sunny days, summer also brings a higher chance of overcast conditions due to afternoon thunderstorms.
  • Air Quality/Pollution: Air quality remains generally good in summer but may be impacted by localized pollution from urban areas.
  • Storms: Philadelphia experiences frequent afternoon thunderstorms in the summer, often producing heavy rainfall and lightning.
    Winds: Breezy conditions continue, especially near the Delaware River.
  • Days Over 90 Degrees: Days over 90 degrees Fahrenheit are common in summer in Philadelphia, making it a warm and occasionally hot season.

Fall (September to November):

  • Temperature Range: Fall in Philadelphia is crisp and comfortable. Highs range from 80°F (27°C) in September to 57°F (14°C) in November, while nighttime lows range from 62°F (17°C) to 36°F (2°C).
  • Humidity: Humidity levels decrease in the fall, creating pleasant weather.
  • UV Reports: UV levels decrease in the fall, but sun protection is still advisable on sunny days.
  • Precipitation: Fall is moderately wet, with average monthly rainfall ranging from 3 to 4 inches.
  • Sunshine Days: Fall offers a mix of sunny and overcast days, making it a pleasant time for outdoor activities.
  • Air Quality/Pollution: Air quality is generally good in the fall, with minimal pollution.
  • Storms: Fall can bring occasional rain showers, especially in October, but the frequency of severe storms decreases.
    Winds: Breezy conditions may occur.
  • Days Over 90 Degrees: Days over 90 degrees Fahrenheit are rare in fall, with mild and comfortable temperatures.

Enjoy your trip to Philadelphia!

 

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