Forecast Details for Butte, MT

Recent Locations: Butte, MT

Tonight: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 50. North northwest wind 5 to 8 mph becoming calm after midnight.

Monday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Light and variable wind becoming north northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday Night: A 40 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 48. Northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

Tuesday: A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 74. Light and variable wind becoming west northwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

Tuesday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 47. North northwest wind 5 to 10 mph becoming light north after midnight. Winds could gust as high as 18 mph.

Wednesday: A 30 percent chance of showers and thunderstorms after noon. Patchy fog before 7am. Otherwise, mostly sunny, with a high near 74.

Wednesday Night: Mostly clear, with a low around 46.

Thursday: Sunny, with a high near 80.

Thursday Night: Mostly clear, with a low around 49.

Friday: Sunny, with a high near 83.

Friday Night: Partly cloudy, with a low around 49.

Saturday: Sunny, with a high near 83.

Saturday Night: Partly cloudy, with a low around 50.

Sunday: Mostly sunny, with a high near 82.

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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 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