Forecast Details for Grafton, MA

Recent Locations: Ballston Lake, NY Richmond, VA Grafton, MA

Overnight: Showers and possibly a thunderstorm. Patchy fog. Low around 58. North wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday: Showers and possibly a thunderstorm before noon, then showers likely. Some of the storms could produce heavy rainfall. Patchy fog. High near 66. North wind around 6 mph. Chance of precipitation is 90%. New precipitation amounts between 1 and 2 inches possible.

Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 48. West wind around 6 mph.

Monday: Sunny, with a high near 73. Northwest wind around 6 mph.

Monday Night: Mostly clear, with a low around 48. Light and variable wind.

Tuesday: Sunny, with a high near 73. East wind 5 to 7 mph.

Tuesday Night: Partly cloudy, with a low around 49. Northeast wind 3 to 5 mph.

Wednesday: Partly sunny, with a high near 71. Northeast wind around 7 mph.

Wednesday Night: Partly cloudy, with a low around 50. Light and variable wind.

Thursday: Sunny, with a high near 79. North wind 5 to 7 mph.

Thursday Night: Mostly clear, with a low around 50. North wind around 6 mph.

Friday: Sunny, with a high near 70. North wind around 7 mph.

Friday Night: Mostly clear, with a low around 45. East wind around 5 mph becoming light and variable in the evening.

Saturday: Sunny, with a high near 72. North wind 5 to 7 mph becoming east in the afternoon.

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Weather Topic: What are Altocumulus Clouds?

Home - Education - Cloud Types - Altocumulus Clouds

Next Topic: Altostratus Clouds

Similar to cirrocumulus clouds, altocumulus clouds are characterized by cloud patches. They are distinguished by larger cloudlets than cirrocumulus clouds but are still smaller than stratocumulus clouds.

Altocumulus clouds most commonly form in middle altitudes (between 2 and 5 km) and may resemble, at times, the shape of a flying saucer. These uncommon formations, called altocumulus lenticularis, are created by uplift in the atmosphere and are most often seen in close proximity to mountains.

Next Topic: Altostratus Clouds

Weather Topic: What are Cirrocumulus Clouds?

Home - Education - Cloud Types - Cirrocumulus Clouds

Next Topic: Cirrostratus Clouds

Cirrocumulus clouds form at high altitudes (usually around 5 km) and have distinguishing characteristics displayed in a fine layer of small cloud patches. These small cloud patches are sometimes referred to as "cloudlets" in relation to the whole cloud formation.

Cirrocumulus clouds are formed from ice crystals and water droplets. Often, the water droplets in the cloud freeze into ice crystals and the cloud becomes a cirrostratus cloud. Because of this common occurrence, cirrocumulus cloud formations generally pass rapidly.

Next Topic: Cirrostratus Clouds