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

Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Laurence G Hanscom Field Airport (KBED)

Lat: 42.47°NLon: 71.29°WElev: 132ft.

Fair

6°F

-14°C

Humidity 76%
Wind Speed Calm
Barometer 30.22 in (1025.1 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Last update 9 Dec 4:51 am EST
Extended Forecast for

Lexington MA

  • Today

    Today: Increasing clouds, with a high near 29. Calm wind.

    High: 29 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of snow showers, mainly before midnight. Mostly cloudy, with a temperature rising to around 30 by 3am. South wind 8 to 13 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 22 °F⇑

    Chance Snow
    Showers

  • Wednesday

    Wednesday: Rain, mainly after 1pm. High near 44. South wind 9 to 17 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Mostly Cloudy
    then Rain

  • Wednesday Night

    Wednesday Night: Rain before 10pm, then a chance of showers between 10pm and 4am. Low around 31. Southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 31 °F

    Rain then
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of rain and snow showers before 7am, then a slight chance of snow showers. Mostly sunny, with a high near 34. Breezy, with a west wind 15 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.

    High: 34 °F

    Slight Chance
    Rain/Snow and
    Breezy

  • Thursday Night

    Thursday Night: A slight chance of snow showers before 3am. Partly cloudy, with a low around 21. Breezy, with a west wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Chance of precipitation is 20%.

    Low: 21 °F

    Slight Chance
    Snow Showers
    and Breezy

  • Friday

    Friday: Sunny, with a high near 32. West wind around 11 mph, with gusts as high as 28 mph.

    High: 32 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 22. Southwest wind around 7 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 36. Southwest wind 5 to 9 mph, with gusts as high as 21 mph.

    High: 36 °F

    Partly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 29. Calm wind.
Tonight
A chance of snow showers, mainly before midnight. Mostly cloudy, with a temperature rising to around 30 by 3am. South wind 8 to 13 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Wednesday
Rain, mainly after 1pm. High near 44. South wind 9 to 17 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain before 10pm, then a chance of showers between 10pm and 4am. Low around 31. Southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A slight chance of rain and snow showers before 7am, then a slight chance of snow showers. Mostly sunny, with a high near 34. Breezy, with a west wind 15 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of snow showers before 3am. Partly cloudy, with a low around 21. Breezy, with a west wind 15 to 20 mph decreasing to 8 to 13 mph after midnight. Chance of precipitation is 20%.
Friday
Sunny, with a high near 32. West wind around 11 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 22. Southwest wind around 7 mph.
Saturday
Partly sunny, with a high near 36. Southwest wind 5 to 9 mph, with gusts as high as 21 mph.
Saturday Night
A chance of snow after 9pm. Mostly cloudy, with a low around 23. West wind around 7 mph. Chance of precipitation is 40%.
Sunday
A chance of snow. Mostly cloudy, with a high near 31. Northwest wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 14. Northwest wind around 9 mph.
Monday
Sunny, with a high near 25. Northwest wind 7 to 9 mph, with gusts as high as 21 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lexington MA
 42.47°N 71.22°W (Elev. 197 ft)
Last Update:
5:02 am EST Dec 9, 2025
Forecast Valid:
5am EST Dec 9, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation