Forecast Details for Fountain Hills, AZ

Recent Locations: East Petersburg, PA Hanover Park, IL Fountain Hills, AZ

Tonight: Mostly clear, with a low around 83. West southwest wind around 5 mph becoming calm after midnight.

Tuesday: Sunny and hot, with a high near 110. Calm wind becoming west around 5 mph in the afternoon.

Tuesday Night: A 20 percent chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 83. West wind around 5 mph becoming calm after midnight.

Wednesday: Sunny, with a high near 108. Calm wind becoming west southwest around 5 mph in the afternoon.

Wednesday Night: A 10 percent chance of showers and thunderstorms. Partly cloudy, with a low around 83. Northwest wind around 5 mph becoming calm in the evening.

Thursday: A chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 107. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 30%.

Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 11pm. Partly cloudy, with a low around 79. South wind around 5 mph becoming calm after midnight.

Friday: A 40 percent chance of showers and thunderstorms, mainly after 11am. Partly sunny, with a high near 103. Calm wind becoming south southwest around 5 mph in the afternoon.

Friday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 79. Southwest wind around 5 mph becoming calm after midnight.

Saturday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 102. Calm wind becoming southwest around 5 mph in the afternoon.

Saturday Night: A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 79. West southwest wind around 5 mph becoming calm.

Sunday: A 10 percent chance of showers and thunderstorms. Sunny, with a high near 103. Calm wind becoming west southwest around 5 mph in the afternoon.

Sunday Night: A 10 percent chance of showers and thunderstorms. Mostly clear, with a low around 79. West wind around 5 mph becoming calm in the evening.

Monday: A 10 percent chance of showers and thunderstorms. Sunny, with a high near 106. Calm wind becoming west southwest around 5 mph in the afternoon.

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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