Forecast Details for Sunnyvale, CA

Recent Locations: Killeen, TX Washington, DC Sunnyvale, CA

Tonight: Patchy fog after 3am. Otherwise, mostly clear, with a low around 44. Light and variable wind.

Sunday: Patchy fog before 9am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 67. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

Sunday Night: Patchy fog after 9pm. Otherwise, increasing clouds, with a low around 49. Light northwest wind.

Monday: Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming north around 6 mph in the morning.

Monday Night: A 20 percent chance of rain after 10pm. Mostly cloudy, with a low around 46. North northwest wind around 5 mph becoming calm in the evening.

Tuesday: A 50 percent chance of rain. Mostly cloudy, with a high near 58. New precipitation amounts between a tenth and quarter of an inch possible.

Tuesday Night: A 50 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 43.

Wednesday: A chance of rain, mainly between 10am and 4pm. Mostly sunny, with a high near 60.

Wednesday Night: A slight chance of rain before 10pm. Patchy fog after 1am. Otherwise, mostly clear, with a low around 40.

Thursday: Areas of fog before 8am. Otherwise, mostly sunny, with a high near 62.

Thursday Night: Patchy fog. Otherwise, mostly clear, with a low around 41.

Friday: A slight chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 60.

Friday Night: A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 42.

Saturday: A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 57.

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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 Fog?

Home - Education - Cloud Types - Fog

Fog Next Topic: Fractus Clouds

Fog is technically a type of stratus cloud, which lies along the ground and obscures visibility.

It is usually created when humidity in the air condenses into tiny water droplets. Because of this, some places are more prone to foggy weather, such as regions close to a body of water.

Fog is similar to mist; both are the appearance of water droplets suspended in the air, but fog is the term applied to the condition when visibility is less than 1 km.

Next Topic: Fractus Clouds

Weather Topic: What is Freezing Rain?

Home - Education - Precipitation - Freezing Rain

Next Topic: Graupel

Freezing rain is a condition where precipitation which has fallen in the form of water droplets reaches temperatures which are below freezing and freezes upon coming into contact with surface objects. The result of this precipitation is a glaze of ice which can be damaging to plants and man-made structures. A severe onset of freezing rain which results in a very thick glaze of ice is known as an ice storm.

Next Topic: Graupel