Forecast Details for Boston, MA

Recent Locations: Boston, MA

Today: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 80. Southeast wind 9 to 11 mph becoming southwest in the afternoon.

Tonight: Partly cloudy, with a low around 59. Southwest wind around 9 mph.

Saturday: A chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 83. Southwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night: A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 58. Southwest wind 6 to 10 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers likely, mainly before 10am. Mostly cloudy, with a high near 64. South wind around 7 mph. Chance of precipitation is 60%.

Sunday Night: A chance of showers. Cloudy, with a low around 51. Calm wind becoming northeast around 5 mph after midnight. Chance of precipitation is 50%.

Monday: A chance of showers. Mostly cloudy, with a high near 57. Northeast wind 9 to 11 mph. Chance of precipitation is 50%.

Monday Night: A chance of showers after 1am. Cloudy, with a low around 49. Northeast wind around 6 mph. Chance of precipitation is 30%.

Tuesday: Showers likely, mainly after 2pm. Mostly cloudy, with a high near 64. East wind 6 to 10 mph. Chance of precipitation is 60%.

Tuesday Night: Showers. Low around 57. South wind around 7 mph. Chance of precipitation is 80%.

Wednesday: A chance of showers. Partly sunny, with a high near 70. Southwest wind 6 to 10 mph. Chance of precipitation is 50%.

Wednesday Night: A chance of showers. Mostly cloudy, with a low around 55. Southwest wind around 6 mph becoming northwest after midnight. Chance of precipitation is 30%.

Thursday: A chance of showers. Partly sunny, with a high near 66. North wind 7 to 9 mph. Chance of precipitation is 30%.

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

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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 Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds