Our Proprietary 10-Day Forecast

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Current warnings over Foster City, 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 Foster City, 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 Foster City, 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 Mateo 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 Foster City, 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 Foster City, 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 Foster City, 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 Foster City, 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 Foster City, 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 Mateo 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)
Foster City, California Climate Summary

General Climate

Foster City, California experiences a Mediterranean climate, characterized by warm, dry summers and mild, wet winters. The city enjoys a moderate climate year-round, with average temperatures ranging from the mid-40s in the winter to the mid-70s in the summer.

Temperature

    •   Average Annual Temperature: 57.6°F (14.2°C)
    •   Average Summer Temperature (July): 75.3°F (24.1°C)
    •   Average Winter Temperature (January): 46.3°F (7.9°C)
    •   Record High Temperature: 106°F (41.1°C)
    •   Record Low Temperature: 19°F (-7.2°C)

Precipitation

    •   Average Annual Precipitation: 21.71 inches (551.5 mm)
    •   Average Number of Rainy Days: 64
    •   Wettest Month: February (3.56 inches or 90.4 mm)
    •   Driest Month: July (0.02 inches or 0.5 mm)

Humidity

    •   Average Annual Humidity: 73%
    •   Highest Humidity: January (80%)
    •   Lowest Humidity: August (65%)

Wind

    •   Average Wind Speed: 10 mph (16 km/h)
    •   Prevailing Wind Direction: Northwest

Sunshine

    •   Average Annual Sunshine: 2,918 hours
    •   Sunniest Month: July (340 hours)
    •   Cloudiest Month: December (168 hours)

Climate Highlights

    •   Foster City's Mediterranean climate makes it an ideal location for outdoor activities year-round.
    •   The city's mild winters and warm summers attract visitors from all over the world.
    •   The city's proximity to the Pacific Ocean provides a cooling breeze during the summer months.
    •   Foster City is also home to a number of parks and trails, which offer residents and visitors a chance to enjoy the outdoors.

Overall, Foster City, California enjoys a moderate and pleasant climate that is ideal for both living and visiting.

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

    •   Foster City is built on a former salt marsh, which was home to a diverse ecosystem of birds, fish, and plants.

    •   The city's lagoon system provides a habitat for numerous migratory waterfowl, including Canada geese, mallards, and egrets.

Science

    •   Foster City is a hub for biotechnology and life sciences companies, including Gilead Sciences and Illumina.

    •   The city's proximity to Stanford University and the University of California, Berkeley fosters collaboration and innovation in scientific research.

Personalities

  • William C. Foster:

    The city's namesake was a prominent lawyer and statesman who served as Secretary of Defense under President Dwight D. Eisenhower.

  • Dr. Jonas Salk:

    The developer of the polio vaccine lived and worked in Foster City during the 1960s and 1970s.

  • Steve Jobs:

    The co-founder of Apple lived in Foster City in the 1980s and 1990s.

    • Tourist Attractions
    1.Coyote Point Recreation Area:

    This waterfront park offers scenic views of the San Francisco Bay, hiking and biking trails, a fishing pier, and a marina.

    2.Foster City Lagoon:

    A picturesque body of water surrounded by lush greenery, the lagoon is perfect for kayaking, paddleboarding, or simply relaxing by the shore.

    3.Edgewood Park Natural Preserve:

    A 340-acre park featuring hiking trails, a redwood forest, and a historic barn. It's a great place to escape the hustle and bustle and immerse yourself in nature.

    Nearby Cities:

    Redwood Shores, CA
    Belmont, CASan Carlos, CA
    San Mateo, CARedwood City, CA
    Burlingame, CAHillsborough, CA
    North Fair Oaks, CAMillbrae, CA
    Atherton, CAMenlo Park, CA
    Woodside, CAEast Palo Alto, CA
    San Bruno, CAPalo Alto, CA
    Stanford, CASouth San Francisco, CA
    San Jose, CA
    Sacramento, CAOakland, CA
    Stockton, CAFremont, CA
    Modesto, CASanta Rosa, CA
    Elk Grove, CAHayward, CA
    Salinas, CASunnyvale, CA
    Roseville, CA