Forecast Details for Rancho Cucamonga, CA

Recent Locations: Harrah, OK Hiwassee, VA Rancho Cucamonga, CA

Tonight: Clear, with a low around 55. Calm wind becoming north around 5 mph.

Monday: Sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.

Monday Night: Partly cloudy, with a low around 54. West wind around 5 mph becoming calm.

Tuesday: Mostly cloudy, with a high near 68. East wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

Tuesday Night: A chance of showers, mainly before 4am. Mostly cloudy, with a low around 51. West wind around 5 mph becoming calm. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

Wednesday: A chance of showers, mainly between 10am and 4pm. Mostly cloudy, with a high near 63. Chance of precipitation is 40%.

Wednesday Night: A slight chance of showers before 10pm. Partly cloudy, with a low around 46. Chance of precipitation is 20%.

Thursday: A slight chance of showers after 10am. Mostly sunny, with a high near 67.

Thursday Night: A slight chance of showers before 10pm. Partly cloudy, with a low around 48.

Friday: Sunny, with a high near 70.

Friday Night: Mostly clear, with a low around 47.

Saturday: Sunny, with a high near 69.

Saturday Night: A chance of showers. Mostly cloudy, with a low around 47.

Sunday: Showers likely. Cloudy, with a high near 62.

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

Current U.S. National Radar--Current

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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 are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds

Weather Topic: What are Cirrostratus Clouds?

Home - Education - Cloud Types - Cirrostratus Clouds

Next Topic: Cirrus Clouds

Cirrostratus clouds are high, thin clouds that form above 20,000 feet and are made mostly of ice crystals. They sometimes look like giant feathers, horse tails, or curls of hair in the sky. These clouds are pushed by the jet stream and can move at high speeds reaching 100 mph.

What do they indicate?
They indicate that a precipitation is likely within 24 hours.

Next Topic: Cirrus Clouds