Forecast Details for Philadelphia, PA

Recent Locations: Falls Church, VA Boswell, PA Philadelphia, PA

Current Alerts for Philadelphia, PA: Air Quality Alert

Tonight: Widespread dense fog, mainly after 10pm. Otherwise, mostly cloudy, with a low around 36. Calm wind.

Wednesday: A chance of rain, mainly between 2pm and 5pm. Widespread dense fog, mainly before 11am. Otherwise, cloudy, with a high near 46. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

Wednesday Night: A slight chance of rain between 7pm and 1am. Patchy fog. Otherwise, mostly cloudy, with a low around 38. West wind around 5 mph becoming north after midnight. Chance of precipitation is 20%.

Thursday: A chance of rain after 1pm. Patchy fog before 10am. Otherwise, cloudy, with a high near 42. East wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 38. East wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

Friday: Rain. High near 48. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday Night: A chance of rain before 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 30%.

Saturday: Mostly cloudy, with a high near 50.

Saturday Night: A chance of rain after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 30%.

Sunday: Rain and snow likely, mainly after 1pm. Mostly cloudy, with a high near 40. Chance of precipitation is 60%.

Sunday Night: A chance of snow. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.

Monday: Mostly cloudy, with a high near 37.

Monday Night: Partly cloudy, with a low around 23.

Tuesday: Sunny, with a high near 33.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

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National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds