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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Hazardous Weather Conditions

Current conditions at

SAN FRANCISCO DOWNTOWN (SFOC1)

Lat: 37.77056°NLon: 122.42694°WElev: 150.0ft.

NA

61°F

16°C

Humidity 62%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 17 Mar 07:43 AM PDT
Extended Forecast for

Colma CA

Heat Advisory March 17, 08:07am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 17, 08:07am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. West northwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 86. Light and variable wind becoming north northwest 5 to 7 mph in the morning.
Tonight
Mostly clear, with a low around 57. West northwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 85. Calm wind becoming northwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 58. West northwest wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 86. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 60.
Friday
Sunny, with a high near 87.
Friday Night
Partly cloudy, with a low around 59.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Mostly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 51.
Monday
Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Colma CA
 37.68°N 122.44°W (Elev. 338 ft)
Last Update:
1:54 am PDT Mar 17, 2026
Forecast Valid:
8am PDT Mar 17, 2026-6pm PDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation