Forecast Details for San Jose, CA

Recent Locations: San Jose, CA  
Overnight: Mostly cloudy, with a steady temperature around 46. Southeast wind 6 to 8 mph.
Thursday: Patchy fog between 8am and 9am. Otherwise, mostly cloudy, with a high near 63. Southeast wind 5 to 7 mph becoming calm in the afternoon.
Thursday Night: Rain, mainly after 10pm. Patchy fog before 9pm. Low around 51. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Friday: Rain likely, mainly before 7am. Patchy fog before noon. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming north northwest around 6 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night: A 30 percent chance of rain after 10pm. Patchy fog. Otherwise, mostly cloudy, with a low around 51. Light and variable wind.
Saturday: Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 66.
Saturday Night: A 20 percent chance of rain after 10pm. Areas of fog. Otherwise, mostly cloudy, with a low around 50.
Sunday: Rain. Mostly cloudy, with a high near 62.
Sunday Night: Patchy fog after 10pm. Otherwise, partly cloudy, with a low around 39.
Monday: Patchy fog before 9am. Otherwise, sunny, with a high near 58.
Monday Night: Patchy fog. Patchy frost. Otherwise, mostly clear, with a low around 36.
Tuesday: Patchy fog. Patchy frost. Otherwise, mostly sunny, with a high near 58.
Tuesday Night: Partly cloudy, with a low around 39.
New Year's Day: Partly sunny, with a high near 62.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Want to Receive our Free Daily Forecast Emails in your inbox by 5 a.m.?
There are no ads! Learn More
We respect your privacy and will not share or sell your email with anyone.

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

Today's National Weather Map

National Weather Forecast for Tomorrow

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

Tomorrows National Weather Map

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.

North American Water Vapor Map

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