Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Clear

50°F

10°C

Humidity 87%
Wind Speed SSW 4 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 46°F (8°C)
Visibility 7.00 mi
Wind Chill49°F (9°C)
Last update 18 Apr 05:20 AM PDT
Extended Forecast for

Hillsborough CA

  • Today

    Today: Mostly sunny, with a high near 74. Calm wind becoming west northwest around 6 mph in the afternoon.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 50. Light west southwest wind.

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 69. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 69 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers after 11pm.  Partly cloudy, with a low around 51. South wind 6 to 9 mph.

    Low: 51 °F

    Slight Chance
    Showers

  • Monday

    Monday: A 50 percent chance of showers.  Partly sunny, with a high near 70. South wind 6 to 11 mph, with gusts as high as 20 mph.  New precipitation amounts between a tenth and quarter of an inch possible.

    High: 70 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm.  Low around 51. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: Showers, with thunderstorms also possible after 11am.  High near 64. Chance of precipitation is 90%.

    High: 64 °F

    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 11pm, then a chance of rain after 11pm.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of rain, mainly before 11am.  Mostly sunny, with a high near 65.

    High: 65 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 74. Calm wind becoming west northwest around 6 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 50. Light west southwest wind.
Sunday
Partly sunny, with a high near 69. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Sunday Night
A 20 percent chance of showers after 11pm. Partly cloudy, with a low around 51. South wind 6 to 9 mph.
Monday
A 50 percent chance of showers. Partly sunny, with a high near 70. South wind 6 to 11 mph, with gusts as high as 20 mph. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Showers and possibly a thunderstorm. Low around 51. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers, with thunderstorms also possible after 11am. High near 64. Chance of precipitation is 90%.
Tuesday Night
A chance of showers and thunderstorms before 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 50.
Wednesday
A chance of rain, mainly before 11am. Mostly sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Hillsborough CA
 37.55°N 122.35°W (Elev. 197 ft)
1:41 am PDT Apr 18, 2026
5am PDT Apr 18, 2026-6pm PDT Apr 24, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database