National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorm and Excessive Rainfall Potential for the Central U.S. Today

Severe thunderstorms with a threat for large hail, isolated damaging winds and possibly a tornado are expected in parts of eastern Colorado today from mid afternoon to early evening. Several days of heavy rainfall will begin today over the western Gulf Coast where Flood Watches and excessive rainfall outlooks have been issued for today, Saturday, and Sunday. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

haze

66°F

19°C

Humidity 52%
Wind Speed NW 20 MPH
Barometer 29.84 in (1010.5 mb)
Dewpoint 48°F (9°C)
Visibility 5.00 mi
Last update 21 May 03:10 PM PDT
Extended Forecast for

Hillsborough CA

  • Tonight

    Tonight: Mostly clear, with a low around 50. West wind 5 to 7 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 72. Light south southwest wind becoming southwest 6 to 11 mph in the afternoon.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52. South southwest wind 5 to 8 mph.

    Low: 52 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 71. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52. Southwest wind 5 to 13 mph, with gusts as high as 21 mph.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Memorial Day

    Memorial Day: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 50. West wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 72. Light south southwest wind becoming southwest 6 to 11 mph in the afternoon.
Friday Night
Mostly clear, with a low around 52. South southwest wind 5 to 8 mph.
Saturday
Sunny, with a high near 71. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Saturday Night
Partly cloudy, with a low around 52. Southwest wind 5 to 13 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 51.
Memorial Day
Partly sunny, with a high near 65.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
Sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hillsborough CA
 37.55°N 122.35°W (Elev. 197 ft)
Last Update:
1:26 pm PDT May 21, 2026
Forecast Valid:
3pm PDT May 21, 2026-6pm PDT May 28, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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Chance of Precipitation