Our Proprietary 10-Day Forecast

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Current warnings over San Marino, 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 San Marino, 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 San Marino, 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 Los Angeles 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 San Marino, 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 San Marino, 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 San Marino, 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 San Marino, 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 San Marino, 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 Los Angeles 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.
 
Get access to:
  • European ECMWF HRES
  • American GFS
  • Canadian GDPS GEM
  • German DWD ICON
  • British MetOffice's UKMET Unified Model
  • American NAM
  • American HRRR
  • American NBM - National Blend of Models
  • GEFS, GEPS, MOGREPS & European Ensembles
  • Probabilities & Averages
  • 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.
 
See the latest forecast data as the models update.
 
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Climate Summary
(made with AI, use with caution)
San Marino, CA Climate Summary

General Climate

    •   San Marino, California has a Mediterranean climate, characterized by warm, dry summers and mild, wet winters.
    •   The average annual temperature is 61.8°F (16.6°C).
    •   The average annual precipitation is 21.3 inches (541 mm).

Temperature

    •   The warmest month is August, with an average temperature of 77.8°F (25.4°C).
    •   The coldest month is January, with an average temperature of 46.2°F (7.9°C).
    •   The average daily temperature range is 20.3°F (11.3°C).

Precipitation

    •   The wettest month is February, with an average precipitation of 3.9 inches (99 mm).
    •   The driest month is July, with an average precipitation of 0.1 inches (3 mm).
    •   The average annual precipitation is 21.3 inches (541 mm).

Sunshine

    •   San Marino receives an average of 280 sunny days per year.
    •   The sunniest month is July, with an average of 11 hours of sunshine per day.
    •   The cloudiest month is December, with an average of 5 hours of sunshine per day.

Humidity

    •   The average annual relative humidity is 66%.
    •   The most humid month is January, with an average relative humidity of 72%.
    •   The least humid month is July, with an average relative humidity of 58%.

Wind

    •   The average annual wind speed is 6.4 mph (10.3 km/h).
    •   The windiest month is March, with an average wind speed of 7.2 mph (11.6 km/h).
    •   The calmest month is September, with an average wind speed of 5.7 mph (9.2 km/h).

Climate Change

    •   San Marino, California is experiencing the effects of climate change, including rising temperatures, more extreme weather events, and changes in precipitation patterns.
    •   The average annual temperature has increased by 1.8°F (1.0°C) since 1901.
    •   The number of days with temperatures above 90°F (32°C) has increased by 10 days since 1901.
    •   The average annual precipitation has decreased by 2 inches (51 mm) since 1901.
    •   The number of days with heavy rain (more than 1 inch) has decreased by 10 days since 1901.

Overall

San Marino, California has a Mediterranean climate with warm, dry summers and mild, wet winters. The average annual temperature is 61.8°F (16.6°C) and the average annual precipitation is 21.3 inches (541 mm). San Marino is experiencing the effects of climate change, including rising temperatures, more extreme weather events, and changes in precipitation patterns.

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

    •   San Marino is home to the Huntington Library, Art Museum, and Botanical Gardens, which boasts a vast collection of plants from around the world, including the largest collection of camellias in North America.

    •   The city is situated in the San Gabriel Valley, a region known for its biodiversity. The nearby San Gabriel Mountains are home to a variety of wildlife, including mountain lions, bobcats, and deer.

Science

    •   San Marino is the birthplace of the California Institute of Technology (Caltech), a world-renowned research and educational institution.

    •   Caltech's Jet Propulsion Laboratory (JPL) is responsible for managing NASA's robotic missions to explore the solar system.

    •   The city is also home to the Huntington Medical Research Institutes, a biomedical research center focused on cancer, cardiovascular disease, and neurological disorders.

Personalities

    •   Henry E. Huntington, a railroad tycoon and philanthropist, founded the Huntington Library, Art Museum, and Botanical Gardens.

    •   Charles Lindbergh, the aviator, lived in San Marino after his famous transatlantic flight.

    •   Ronald Reagan, the 40th President of the United States, was a resident of San Marino for over 30 years.

Tourist Attractions
1. Huntington Library, Art Museum, and Botanical Gardens

2. The Gamble House

3. Norton Simon Museum

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