GROTON, CT 06340 Weather Forecast & Current Conditions

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GROTON, CT
Current Weather

1:56 AM EDT JUL 15, 2026
Clear
75°F
Feels Like: 75°F
Dewpoint: 70°F
Rel. Hum.: 84%
Visibility: 10 miles
Wind: W at 13 mph, gusts to 21
Pressure: 29.81 inches
Last 72 hours

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GROTON, CT 06340
Weather Forecast

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TONIGHT
Clear. Lows in the mid 70s. Southwest winds 10 to 15 mph. Gusts up to 30 mph, decreasing to 20 mph after midnight.
WEDNESDAY
Sunny. Patchy smoke. Humid with highs in the lower 90s. West winds 5 to 10 mph with gusts up to 20 mph. Heat index values up to 101.
WEDNESDAY NIGHT
Partly cloudy. Smoke in the evening, then patchy smoke after midnight. Lows around 70. Northwest winds 5 to 10 mph. Gusts up to 20 mph in the evening.
THURSDAY
Patchy smoke in the morning. Mostly sunny. Highs in the upper 80s. West winds 5 to 10 mph. Gusts up to 20 mph in the afternoon.
THURSDAY NIGHT
Partly cloudy. Lows in the upper 60s. West winds 5 to 10 mph with gusts up to 20 mph, becoming northwest after midnight.
FRIDAY
Sunny. Highs in the upper 80s.
FRIDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the mid 60s. Chance of rain 30 percent.
SATURDAY
Partly sunny. A chance of showers in the morning, then a chance of showers and thunderstorms in the afternoon. Highs around 80. Chance of rain 50 percent.
SATURDAY NIGHT
Showers likely with a chance of thunderstorms. Lows in the upper 60s. Chance of rain 70 percent.
SUNDAY
Partly sunny. Showers likely, mainly in the morning. Highs in the mid 80s. Chance of rain 60 percent.
SUNDAY NIGHT
Mostly cloudy with a chance of showers in the evening, then partly cloudy after midnight. Lows in the mid 60s. Chance of rain 50 percent.
MONDAY
Mostly sunny. Highs in the mid 80s.
MONDAY NIGHT
Partly cloudy in the evening, then mostly cloudy with a chance of showers after midnight. Lows in the upper 60s. Chance of rain 40 percent.

Visible Weather Satellite
GROTON, CT 06340
Infrared Weather Satellite
GROTON, CT 06340
NEXRAD Weather Radar
GROTON, CT 06340

GROTON, CT 3 hourly weather forecast

weather forecast created  7:00 PM CDT  7/14/2026
Wednesday
15 JUL 2026
GROTON, CT 06340 weather forecast Day 1, 0 hours 2 AM 81° 84° Clear 0%

0% Thunder
( 1% severe)
WSW   9 65% 68°
Low 78° GROTON, CT 06340 weather forecast Day 1, 3 hours 5 AM 79° 81° Clear W   10 69% 68°
High 96° GROTON, CT 06340 weather forecast Day 1, 6 hours 8 AM 84° 88° Clear 1%

0% Thunder
( 2% severe)
W   10 63% 70°

Partly Cloudy



GROTON, CT 06340 weather forecast Day 1, 9 hours 11 AM 91° 97° Clear W   13 50% 70°
GROTON, CT 06340 weather forecast Day 1, 12 hours 2 PM 95° 99° Partly Cloudy 8%

0% Thunder
( 6% severe)
WNW   13 40% 67°
GROTON, CT 06340 weather forecast Day 1, 15 hours 5 PM 95° 96° Partly Cloudy WNW   12 35% 63°
GROTON, CT 06340 weather forecast Day 1, 18 hours 8 PM 86° 86° Partly Cloudy 4%

0% Thunder
( 1% severe)
NW   9 43% 61°
GROTON, CT 06340 weather forecast Day 1, 21 hours 11 PM 80° 81° Partly Cloudy NNW   8 47% 58°
Thursday
16 JUL 2026
GROTON, CT 06340 weather forecast Day 2, 0 hours 2 AM 75° 75° Partly Cloudy 1%

0% Thunder
( 1% severe)
N   3 55% 58°
Low 70° GROTON, CT 06340 weather forecast Day 2, 3 hours 5 AM 71° 71° Partly Cloudy   CALM 63% 58°
High 91° GROTON, CT 06340 weather forecast Day 2, 6 hours 8 AM 77° 79° Partly Cloudy 0%

0% Thunder
( 1% severe)
W   2 60% 62°

Partly Cloudy



GROTON, CT 06340 weather forecast Day 2, 9 hours 11 AM 86° 87° Partly Cloudy WSW   10 45% 62°
GROTON, CT 06340 weather forecast Day 2, 12 hours 2 PM 90° 90° Partly Cloudy 0%

0% Thunder
( 3% severe)
WSW   14 38% 61°
GROTON, CT 06340 weather forecast Day 2, 15 hours 5 PM 91° 91° Partly Cloudy WSW   13 37% 61°
GROTON, CT 06340 weather forecast Day 2, 18 hours 8 PM 84° 84° Partly Cloudy 2%

0% Thunder
( 1% severe)
W   9 46% 61°
GROTON, CT 06340 weather forecast Day 2, 21 hours 11 PM 78° 79° Partly Cloudy NW   7 50% 58°

GROTON, CT extended weather forecast

Friday
17 JUL 2026
Saturday
18 JUL 2026
Sunday
19 JUL 2026
Monday
20 JUL 2026
Tuesday
21 JUL 2026
Low 66° Low 66° Low 66° Low 67° Low 69°
High 82° High 73° High 82° High 80° High 78°
GROTON, CT 06340 weather forecast Day 3 GROTON, CT 06340 weather forecast Day 4 GROTON, CT 06340 weather forecast Day 5 GROTON, CT 06340 weather forecast Day 6 GROTON, CT 06340 weather forecast Day 7
Partly Cloudy
2% Rain
Mostly Cloudy
59% Rain
Overcast
66% Rain
Partly Cloudy
23% Rain
Overcast
51% Rain
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