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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

SEATTLE WEATHER FORECAST OFFICE (SEAW1)

Lat: 47.68528°NLon: 122.25111°WElev: 29.0ft.

NA

45°F

7°C

Humidity 69%
Wind Speed N 7 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 35°F (2°C)
Visibility NA
Wind Chill41°F (5°C)
Last update 21 Mar 09:30 AM PDT
Extended Forecast for

3 Miles WNW Sammamish WA

  • Today

    Today: Partly sunny, with a high near 49. Light north wind.

    High: 49 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 37. Calm wind becoming south southeast around 5 mph.

    Low: 37 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 53. Light and variable wind. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 53 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 35. Light north northeast wind.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 52. Light and variable wind.

    High: 52 °F

    Partly Sunny

  • Monday Night

    Monday Night: A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain. High near 53. Chance of precipitation is 100%.

    High: 53 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain. Mostly cloudy, with a low around 40.

    Low: 40 °F

    Rain

  • Wednesday

    Wednesday: Rain. Mostly cloudy, with a high near 52.

    High: 52 °F

    Rain

Detailed Forecast

Today
Partly sunny, with a high near 49. Light north wind.
Tonight
Partly cloudy, with a low around 37. Calm wind becoming south southeast around 5 mph.
Sunday
A chance of rain and snow before 11am, then a slight chance of rain. Partly sunny, with a high near 53. Light and variable wind. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday Night
Mostly cloudy, with a low around 35. Light north northeast wind.
Monday
Partly sunny, with a high near 52. Light and variable wind.
Monday Night
A 40 percent chance of rain after 11pm. Mostly cloudy, with a low around 40.
Tuesday
Rain. High near 53. Chance of precipitation is 100%.
Tuesday Night
Rain. Mostly cloudy, with a low around 40.
Wednesday
Rain. Mostly cloudy, with a high near 52.
Wednesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 38.
Thursday
A chance of rain. Partly sunny, with a high near 53.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 36.
Friday
A slight chance of rain. Partly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Sammamish WA
 47.62°N 122.1°W (Elev. 200 ft)
Last Update:
11:27 pm PDT Mar 20, 2026
Forecast Valid:
10am PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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