Forecast Details for San Diego, CA

Recent Locations: San Diego, CA

Tonight: A slight chance of showers. Mostly cloudy, with a low around 54. Northwest wind around 5 mph. Chance of precipitation is 20%.

Monday: Mostly cloudy, then gradually becoming sunny, with a high near 64. West wind 5 to 10 mph, with gusts as high as 20 mph.

Monday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 54. West wind around 5 mph becoming calm in the evening.

Tuesday: Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 68. Light southwest wind becoming west 5 to 10 mph in the morning.

Tuesday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 54. South wind around 5 mph.

Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 66.

Wednesday Night: Increasing clouds, with a low around 55.

Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 67.

Thursday Night: Mostly cloudy, with a low around 55.

Friday: Partly sunny, with a high near 67.

Friday Night: Increasing clouds, with a low around 56.

Saturday: Mostly cloudy, with a high near 65.

Saturday Night: A slight chance of showers. Mostly cloudy, with a low around 54.

Sunday: A slight chance of showers. Partly sunny, with a high near 62.

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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

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

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