Dangerous, Heat Wave Persists in the Eastern U.S.; Severe Weather Expected in the Central Plains and Mid-Atlantic

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Severe thunderstorms are expected to produce damaging wind gusts from the Upper Ohio Valley into the Mid Atlantic, and across the central Great Plains this afternoon and evening. Large hail and heavy rain is also possible across the Great Plains. Read More >

Current conditions at

Groton / New London, Groton / New London Airport (KGON)

Lat: 41.33°NLon: 72.05°WElev: 10ft.

Fair

74°F

23°C

Humidity 91%
Wind Speed Calm
Barometer 29.86 in (1011.0 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 4 Jul 12:56 am EDT
Extended Forecast for

Yantic CT

Extreme Heat Warning July 4, 01:37am until July 4, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 4, 01:37am until July 4, 09:00pm

    NOW until 9:00pm Sat

    Extreme Heat Warning

  • Overnight

    Low: 76 °F

    Mostly Clear

  • Independence Day

    Independence Day: Scattered showers and thunderstorms after 2pm.  Increasing clouds, with a high near 97. Heat index values as high as 102. Northwest wind 6 to 10 mph.  Chance of precipitation is 30%.

    High: 97 °F

    Sunny then
    Scattered
    T-storms

  • Saturday Night

    Saturday Night: Scattered showers and thunderstorms.  Partly cloudy, with a low around 68. Light and variable wind.  Chance of precipitation is 30%.

    Low: 68 °F

    Scattered
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers, mainly before 8am.  Partly sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.

    High: 88 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of showers after 8pm.  Mostly cloudy, with a low around 62. Light southeast wind.

    Low: 62 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 2pm.  Mostly cloudy, with a high near 77. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm, then showers after 8pm.  Low around 61. Chance of precipitation is 80%.

    Low: 61 °F

    Showers

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm.  High near 76. Chance of precipitation is 80%.

    High: 76 °F

    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 76. Calm wind.
Independence Day
Scattered showers and thunderstorms after 2pm. Increasing clouds, with a high near 97. Heat index values as high as 102. Northwest wind 6 to 10 mph. Chance of precipitation is 30%.
Saturday Night
Scattered showers and thunderstorms. Partly cloudy, with a low around 68. Light and variable wind. Chance of precipitation is 30%.
Sunday
A 30 percent chance of showers, mainly before 8am. Partly sunny, with a high near 88. Calm wind becoming south around 6 mph in the afternoon.
Sunday Night
A 50 percent chance of showers after 8pm. Mostly cloudy, with a low around 62. Light southeast wind.
Monday
Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers likely and possibly a thunderstorm, then showers after 8pm. Low around 61. Chance of precipitation is 80%.
Tuesday
Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. High near 76. Chance of precipitation is 80%.
Tuesday Night
A 40 percent chance of showers before 2am. Mostly cloudy, with a low around 63.
Wednesday
Partly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 66.
Thursday
Mostly sunny, with a high near 88.
Thursday Night
Partly cloudy, with a low around 68.
Friday
A 30 percent chance of showers. Mostly sunny, with a high near 90.
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ABOUT THIS FORECAST

 
Point Forecast:
Yantic CT
 41.52°N 72.07°W (Elev. 52 ft)
11:18 pm EDT Jul 3, 2026
1am EDT Jul 4, 2026-6pm EDT Jul 10, 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