Forecast Details for Acton, MA

Recent Locations: Acton, MA

Today: Mostly sunny and hot, with a high near 92. Heat index values as high as 95. Southwest wind 8 to 10 mph, with gusts as high as 20 mph.

Tonight: Mostly clear, with a low around 71. Southwest wind 6 to 8 mph.

Monday: A slight chance of showers and thunderstorms after 3pm. Partly sunny and hot, with a high near 92. Heat index values as high as 97. Southwest wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Monday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Southwest wind 6 to 8 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 88. West wind around 6 mph. Chance of precipitation is 60%.

Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 50%.

Wednesday: A chance of showers after 5pm. Partly sunny, with a high near 81. Light and variable wind. Chance of precipitation is 30%.

Wednesday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 66. Light east wind. Chance of precipitation is 30%.

Thursday: A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 78. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 30%.

Thursday Night: A chance of showers and thunderstorms. Cloudy, with a low around 64. Light east wind. Chance of precipitation is 40%.

Friday: A chance of showers. Mostly cloudy, with a high near 77. Northeast wind 3 to 5 mph. Chance of precipitation is 30%.

Friday Night: A chance of showers. Mostly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

Saturday: A chance of showers. Mostly cloudy, with a high near 78. East wind 3 to 6 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)

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Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds

Weather Topic: What are Stratus Clouds?

Home - Education - Cloud Types - Stratus Clouds

Next Topic: Wall Clouds

Stratus clouds are similar to altostratus clouds, but form at a lower altitude and are identified by their fog-like appearance, lacking the distinguishing features of most clouds.

Stratus clouds are wider than most clouds, and their base has a smooth, uniform look which is lighter in color than a nimbostratus cloud. The presence of a stratus cloud indicates the possibility of minor precipitation, such as drizzle, but heavier precipitation does not typically arrive in the form of a stratus cloud.

Next Topic: Wall Clouds