Our Proprietary 10-Day Forecast

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Current warnings over South San Francisco, 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.

Do not use our graphics for protection of life or property. Delays in image processing are possible.

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Current radar over South San Francisco, 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 South San Francisco, 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 South San Francisco, 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 South San Francisco, 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 South San Francisco, 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 South San Francisco, 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 South San Francisco, 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.
 
F5Weather Maps

Climate Summary
(made with AI, use with caution)
South San Francisco, CA Climate Summary

General Climate

    •   Mild Mediterranean climate

South San Francisco experiences a mild Mediterranean climate, characterized by warm, dry summers and cool, wet winters.

    •   Average annual temperature

57.8°F (14.3°C)

    •   Average annual precipitation

22.6 inches (574 mm)

Summer

    •   Average summer temperature

67.3°F (19.6°C)

    •   Average July high temperature

77.6°F (25.3°C)

    •   Average July low temperature

56.9°F (13.8°C)

    •   Average summer precipitation

0.3 inches (7.6 mm)

Winter

    •   Average winter temperature

48.3°F (9.1°C)

    •   Average January high temperature

55.1°F (12.8°C)

    •   Average January low temperature

41.5°F (5.3°C)

    •   Average winter precipitation

15.7 inches (399 mm)

Spring and Fall

    •   Spring and fall temperatures

Mild, with average temperatures ranging from 50°F to 65°F (10°C to 18°C)

    •   Spring and fall precipitation

Variable, but generally less than in winter

Other Climate Factors

    •   Fog

South San Francisco is located near the Pacific Ocean and is often affected by fog, especially during the summer months.

    •   Wind

The prevailing wind direction is from the northwest.

    •   Sunshine

South San Francisco receives an average of 260 sunny days per year.

Climate Change

    •   Rising temperatures

South San Francisco has experienced a gradual increase in average temperatures over the past century, consistent with global trends.

    •   Changing precipitation patterns

The region has also seen changes in precipitation patterns, with more intense storms and longer dry spells.

    •   Sea level rise

South San Francisco is vulnerable to sea level rise, which could lead to flooding and other coastal hazards.

Overall, South San Francisco has a mild and pleasant climate, with moderate temperatures and precipitation. However, the region is also facing the challenges of climate change, which could have significant impacts on the local environment and community.

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

    •   South San Francisco is home to the Bay Area's largest salt marsh, Bair Island, a vital habitat for over 200 bird species.

    •   The city's shoreline was once a thriving oyster industry, with over 1,000 oyster beds in the late 1800s.

Science

    •   The Genetech biotechnology company was founded in South San Francisco in 1976, pioneering the development of recombinant DNA technology.

    •   The city is a hub for biomedical research, with numerous biotech and pharmaceutical companies headquartered there.

Personalities

  • Herbert Hoover:

    The 31st President of the United States was born in West Branch, Iowa, but grew up in South San Francisco.

  • Lou Gehrig:

    The legendary baseball player spent his final years in South San Francisco, where he passed away from ALS in 1941.

  • Bruce Lee:

    The martial arts icon lived in South San Francisco for several years and established his first martial arts school there in 1964.

    • Tourist Attractions
    1. Sutro Baths: These historic public baths were built in the late 1800s and offer stunning views of the Pacific Ocean. Visitors can explore the ruins of the baths, swim in the heated pools, and enjoy the surrounding gardens.

    2. California Academy of Sciences: This world-renowned museum is home to a planetarium, an aquarium, a natural history museum, and a rainforest exhibit. Visitors can learn about the history of California, explore the wonders of the natural world, and see live animals from around the globe.

    3. Pier 39: This lively pier is home to a variety of shops, restaurants, and attractions. Visitors can watch the sea lions, take a boat tour, or simply enjoy the views of the San Francisco Bay.

    Nearby Cities:

    San Bruno, CA
    Brisbane, CAMillbrae, CA
    Colma, CABurlingame, CA
    Daly City, CABroadmoor, CA
    Hillsborough, CAPacifica, CA
    San Mateo, CAMission District, CA
    San Francisco, CAFoster City, CA
    Montara, CAChinatown, CA
    Moss Beach, CAEl Granada, CA
    San Jose, CA
    Sacramento, CAStockton, CA
    Fremont, CAModesto, CA
    Santa Rosa, CAElk Grove, CA
    Hayward, CASalinas, CA
    Sunnyvale, CARoseville, CA
    Concord, CA