Forecast Details for Gilroy, CA

Recent Locations: Varnell, GA Hamilton, MT Gilroy, CA

This Afternoon: Sunny, with a high near 75. West wind 6 to 8 mph.

Tonight: Areas of fog after 4am. Otherwise, mostly cloudy, with a low around 46. West northwest wind 5 to 7 mph becoming calm in the evening.

Friday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 70. Light and variable wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

Friday Night: Patchy fog after 5am. Otherwise, increasing clouds, with a low around 45. West southwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 18 mph.

Saturday: Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 66. Light southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph.

Saturday Night: A 20 percent chance of rain after 11pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 48.

Sunday: A 20 percent chance of rain before 11am. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 68.

Sunday Night: Patchy fog after 2am. Otherwise, mostly clear, with a low around 43.

Monday: Areas of fog before 9am. Otherwise, mostly sunny, with a high near 73.

Monday Night: Patchy fog after 4am. Otherwise, mostly clear, with a low around 44.

Tuesday: Patchy fog. Otherwise, mostly sunny, with a high near 76.

Tuesday Night: Patchy fog. Otherwise, partly cloudy, with a low around 47.

Wednesday: Patchy fog. Otherwise, mostly sunny, with a high near 75.

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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 is Rain?

Home - Education - Precipitation - Rain

Rain Next Topic: Shelf Clouds

Precipitation in the form of water droplets is called rain. Rain generally has a tendency to fall with less intensity over a greater period of time, and when rainfall is more severe it is usually less sustained.

Rain is the most common form of precipitation and happens with greater frequency depending on the season and regional influences. Cities have been shown to have an observable effect on rainfall, due to an effect called the urban heat island. Compared to upwind, monthly rainfall between twenty and forty miles downwind of cities is 30% greater.

Next Topic: Shelf Clouds

Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow