Forecast Details for Vallejo, CA

Recent Locations: Clarksville, TN Huntington Beach, CA Vallejo, CA

Overnight: Partly cloudy, with a low around 45. West wind around 5 mph.

Friday: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 61. West southwest wind 3 to 8 mph.

Friday Night: Increasing clouds, with a low around 46. Southwest wind 3 to 6 mph.

Saturday: Mostly cloudy, with a high near 58. Light south southwest wind becoming southwest 5 to 9 mph in the morning.

Saturday Night: Rain likely, mainly after 4am. Mostly cloudy, with a low around 49. South southeast wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

Sunday: Rain. High near 58. Chance of precipitation is 80%.

Sunday Night: Rain. Low around 48. Chance of precipitation is 90%.

Washington's Birthday: Rain. Cloudy, with a high near 54.

Monday Night: Rain. Cloudy, with a low around 44.

Tuesday: Rain. Cloudy, with a high near 52.

Tuesday Night: Rain likely. Mostly cloudy, with a low around 41.

Wednesday: Rain likely. Mostly cloudy, with a high near 53.

Wednesday Night: Rain likely. Mostly cloudy, with a low around 41.

Thursday: Rain likely. Mostly cloudy, with a high near 54.

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

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).

National Weather Forecast--Current

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

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 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