Our Proprietary 10-Day Forecast

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Current warnings over Rancho Cucamonga, California
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<p>Warnings from F5Weather</a></div>

United States weather warnings are issued by various organizations under NOAA. Most from the National Weather Service, but also Storm Prediction Center and National Hurricane Center.

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Current radar over Rancho Cucamonga, California red dot
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<p>Live radar from F5Weather</a></div>

Our radar is based off of US NEXRAD and Canadian weather radar sites through the quality controlled MRMS system. It compiles various sources for radar data and filters out erroneous returns such as sun spikes and ground clutter. We then colorize the precipitation based on our methods for determining precipitation type. Rain is in shades of green, mixed precipitation and freezing rain in shades of pink and snow is in shades of blue.

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Current satellite over Rancho Cucamonga, California red dot
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<p>Live satellite from F5Weather</a></div>

Our satellite is from the GOES-16. It is color enhanced by using a geocolor terrain background during the day and black marble city lights at night. The daytime satellite data is Visible satellite imagery, and nighttime uses Infrared bands. The bluish clouds are fog and low cloud. The whiteest clouds are the coldest, highest cloud tops.

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Current surface weather map around San Bernardino County, CA

This surface map is from the HRRR computer model. It is a 1-hour forecast, updated hourly, which is a good estimate of the current surface conditions. This map shows the current high and low pressure centers, pressure isobar contours, wind streamlines and thickness contours. It also shows the currently depicted preciptiation estimates, although this should not be a substitute for actual live radar. The purple dashed contour is the 5400m thickness line, which is often a good proxy for the rain/snow line.

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Temperatures right now near Rancho Cucamonga, California

This is the latest surface temperatures as depicted by the HRRR computer model, updated hourly. Although these are not actual observations, this model is a very good representation of current conditions as it factors in observations, terrain and physics to give you more detailed temperatures in areas that do not have reporting weather stations. For the latest reports at specific locations, like in Rancho Cucamonga, CA please see our current conditions data on the left and right side of this page, or go to our current conditions page.

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Surface wind speed map over Rancho Cucamonga, CA

This map shows the latest HRRR computer model winds. This depiction of the current wind directions and speeds is an estimate from the computer model. For actual observations in Rancho Cucamonga, CA, see the current conditions data on the left and right side of this page, or go to our current conditions page.

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Regional 24 hour rainfall expected near Rancho Cucamonga, California

This is a forecast of the amount of precipitation expected over the next 24 hours from the HRRR weather forecast model. This is only one forecast depiction, and you should check other models to get a better idea of what may happen. You can view this and other models in more detail on our main weather forecast maps page. There, you will also be able to look at forecasts beyond just 24 hours and look at forecasts out to as far as 16 days.

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Area snowfall accumulation expected around San Bernardino County, California

This is snowfall forecast, with amounts anticipated in the next 24 hours. This guidance is from the HRRR weather model. For more model forecasts out to 16 days, visit our main weather forecast maps page.

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These are Convective Outlooks from the Storm Prediction Center. Click to see Days 1-3 broken down into Tornado, Wind and Hail threats, as well as days 5-8 outlooks.

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Atlantic Hurricane and Tropical Storm Tracking Map
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<p>Hurricane Tracking from F5Weather</a></div>

Our hurricane tracking map monitors for any current or forecast tropical disturbances in the Atlantic. (See our Pacific Hurricane Tracker) Various hurricane models will draw a 'spaghetti plot' in the Atlantic Basin when a disturbance is forecast or exists, showing the system's forecast track. Once a storm has developed, the National Hurricane Center will forecast their official track. This will show up on the map along with the storm's current intensity, track and name. We will also plot some of the storm's vitals and of course the spaghetti plots from the models along with the NHC forecast track will give you an idea of where it's heading, and its forecast intensity with time.

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To view the latest computer models, visit f5wx.com for access to the weather maps and guidance that meteorologists use to make their forecasts.
 
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  • 3-Ensemble Mean & more!
View Skew-T soundings, textual data tables for your location, and of course maps! Weather forecast maps of the basics like temperature, wind, pressure, humidity, dew point, cloud cover, simulated radar, travel weather, rainfall and snow are available. More advanced users can also get use out of our severe weather & tornado threat maps, as well as upper air & shear graphics.
 
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Climate Summary
(made with AI, use with caution)
Rancho Cucamonga, CA Climate Summary

Temperature

    •   Average annual temperature: 62.6°F (17°C)
    •   Average summer temperature: 80.5°F (26.9°C)
    •   Average winter temperature: 44.7°F (7.1°C)
    •   Highest recorded temperature: 117°F (47.2°C)
    •   Lowest recorded temperature: 18°F (-7.8°C)

Precipitation

    •   Average annual precipitation: 15.3 inches (38.9 cm)
    •   Average number of rainy days: 36
    •   Average snowfall: 0.2 inches (0.5 cm)
    •   Wettest month: February (2.9 inches)
    •   Driest month: July (0.0 inches)

Humidity

    •   Average annual relative humidity: 65%
    •   Highest average relative humidity: January (72%)
    •   Lowest average relative humidity: August (55%)

Wind

    •   Average annual wind speed: 6.5 mph (10.5 km/h)
    •   Highest average wind speed: March (7.2 mph)
    •   Lowest average wind speed: August (5.9 mph)

Sunshine

    •   Average annual sunshine: 284 days
    •   Highest average sunshine: July (31 days)
    •   Lowest average sunshine: December (21 days)

Climate Classification

    •   Köppen climate classification: Csa (Mediterranean climate)

Climate Summary

Rancho Cucamonga, California has a Mediterranean climate, with hot, dry summers and mild, wet winters. The average annual temperature is 62.6°F (17°C), with average summer temperatures in the mid-80s and average winter temperatures in the mid-40s. The average annual precipitation is 15.3 inches (38.9 cm), with most of the rain falling between November and April. The average annual sunshine is 284 days, with the sunniest months being July and August.

Rancho Cucamonga is located in the Inland Empire region of Southern California, which is known for its hot summers and mild winters. The climate is influenced by the Pacific Ocean, which helps to moderate the temperatures. However, the region is also subject to occasional heat waves and Santa Ana winds, which can bring hot, dry air from the desert.

Overall, Rancho Cucamonga has a pleasant climate, with mild temperatures and plenty of sunshine. The city is a popular destination for outdoor activities, such as hiking, biking, and swimming.

Facts & Historical Information
(made with AI, use with caution)
Natural History

    •   Rancho Cucamonga was once home to a vast ecosystem of wetlands, riparian forests, and oak woodlands.

    •   The Cucamonga Creek, a tributary of the Santa Ana River, played a crucial role in shaping the landscape.

    •   The area was a haven for wildlife, including coyotes, bobcats, and a variety of bird species.

Science

    •   In the early 20th century, Rancho Cucamonga became a center for citrus cultivation.

    •   The California Institute of Technology (Caltech) established the Jet Propulsion Laboratory (JPL) in Rancho Cucamonga in 1944.

    •   JPL has played a pivotal role in space exploration, including the Voyager and Cassini missions.

Personalities

    •   Tiburcio Tapia, a Mexican land grantee, established Rancho Cucamonga in 1839.

    •   Benjamin D. Wilson, a prominent citrus grower, founded the city of Rancho Cucamonga in 1887.

    •   Dr. Robert Goddard, the \

Tourist Attractions
1.Victoria Gardens

is an open-air shopping, dining, and entertainment complex located in the heart of Rancho Cucamonga. The center features over 170 stores and restaurants, as well as a 14-screen AMC movie theater.

2.The Rancho Cucamonga Epicenter

is a multi-purpose entertainment complex that includes a bowling alley, arcade, laser tag arena, and movie theater. The complex also has a variety of restaurants and bars.

3.The Cucamonga-Guasti Regional Park

is a 141-acre park that offers a variety of recreational opportunities, including hiking, biking, fishing, and picnicking. The park is also home to the Cucamonga-Guasti House, a historic adobe home that was built in 1839.

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