Forecast Details for Castine, ME

Recent Locations: Merrifield, MN Goodells, MI Castine, ME

Today: Mostly sunny, with a high near 43. Breezy, with a northwest wind 10 to 20 mph becoming northeast in the afternoon. Winds could gust as high as 33 mph.

Tonight: A chance of rain before 4am, then a chance of rain and sleet between 4am and 5am, then rain likely after 5am. Mostly cloudy, with a low around 35. Southeast wind 13 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. Little or no sleet accumulation expected.

Sunday: Rain. High near 43. Breezy, with a southeast wind 11 to 20 mph becoming southwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

Sunday Night: Rain likely before 8pm, then a slight chance of showers between 8pm and 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 38. West wind around 9 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Monday: Mostly sunny, with a high near 44. West wind 14 to 17 mph, with gusts as high as 30 mph.

Monday Night: Partly cloudy, with a low around 30. West wind 6 to 10 mph, with gusts as high as 20 mph.

Tuesday: A slight chance of snow between 9am and 2pm, then a chance of rain and snow. Partly sunny, with a high near 40. Northwest wind 7 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 30%.

Tuesday Night: A chance of rain and snow before 7pm, then a slight chance of snow between 7pm and 9pm. Partly cloudy, with a low around 24. Chance of precipitation is 30%.

Wednesday: Sunny, with a high near 39.

Wednesday Night: Mostly clear, with a low around 33.

Thursday: Mostly sunny, with a high near 46. Breezy.

Thursday Night: A slight chance of rain. Mostly cloudy, with a low around 40. Breezy. Chance of precipitation is 20%.

Friday: Partly sunny, with a high near 50.

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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 are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle