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

Hazardous Weather Conditions

Current conditions at

Boston, Logan International Airport (KBOS)

Lat: 42.36°NLon: 71.01°WElev: 20ft.

Overcast

36°F

2°C

Humidity 82%
Wind Speed E 9 mph
Barometer 29.90 in (1012.4 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 20 Feb 12:54 pm EST
Extended Forecast for

Charlestown MA

Winter Weather Advisory February 20, 01:26pm until February 21, 07:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory February 20, 01:26pm until February 21, 07:00am

    NOW until 7:00am Sat

    Winter Weather Advisory

  • This Afternoon

    High: 38 °F

    Wintry Mix

  • Tonight

    Tonight: Snow and sleet, becoming all snow after 9pm. Low around 29. East wind around 7 mph becoming north after midnight. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 2 inches possible.

    Low: 29 °F

    Snow/Sleet
    then Snow

  • Saturday

    Saturday: A chance of snow. Mostly cloudy, with a high near 34. Northeast wind around 7 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    High: 34 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A slight chance of snow before 3am. Partly cloudy, with a low around 25. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: A slight chance of snow after noon. Mostly cloudy, with a high near 37. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 37 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly after 3am. Cloudy, with a low around 29. Northeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Low: 29 °F

    Snow Likely

  • Monday

    Monday: A chance of snow. Cloudy, with a high near 33. North wind 11 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    High: 33 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 23. Northwest wind around 7 mph.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
A slight chance of rain before 2pm, then snow likely between 2pm and 4pm, then snow and sleet after 4pm. High near 38. East wind 6 to 8 mph. Chance of precipitation is 90%. Little or no snow and sleet accumulation expected.
Tonight
Snow and sleet, becoming all snow after 9pm. Low around 29. East wind around 7 mph becoming north after midnight. Chance of precipitation is 100%. New snow and sleet accumulation of 1 to 2 inches possible.
Saturday
A chance of snow. Mostly cloudy, with a high near 34. Northeast wind around 7 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
Saturday Night
A slight chance of snow before 3am. Partly cloudy, with a low around 25. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 20%.
Sunday
A slight chance of snow after noon. Mostly cloudy, with a high near 37. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.
Sunday Night
Snow likely, mainly after 3am. Cloudy, with a low around 29. Northeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of around an inch possible.
Monday
A chance of snow. Cloudy, with a high near 33. North wind 11 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 23. Northwest wind around 7 mph.
Tuesday
Mostly sunny, with a high near 36. Northwest wind around 7 mph.
Tuesday Night
Mostly cloudy, with a low around 17. West wind 3 to 6 mph.
Wednesday
A chance of rain and snow. Mostly cloudy, with a high near 38. South wind 5 to 9 mph. Chance of precipitation is 30%.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 33. Southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Thursday
A chance of rain. Mostly cloudy, with a high near 43. Southwest wind 7 to 9 mph. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Charlestown MA
 42.36°N 71.07°W (Elev. 13 ft)
Last Update:
7:35 am EST Feb 20, 2026
Forecast Valid:
1pm EST Feb 20, 2026-6pm EST Feb 26, 2026
 
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