GROTON, CT 06340 Weather Forecast & Current Conditions

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GROTON, CT
Current Weather

2:56 AM EDT SEP 18, 2025
Overcast
NA
Feels Like: NA
Dewpoint: NA
Rel. Hum.: NA%
Visibility: 10 miles
Wind: N at 9 mph
Pressure: 29.97 inches
Last 72 hours

Local Area Snow Depth

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GROTON, CT 06340
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
OVERNIGHT
Cloudy with a 40 percent chance of showers. Patchy fog. Near steady temperature in the mid 60s. North winds around 5 mph.
THURSDAY
Patchy fog in the morning. Mostly cloudy with a slight chance of showers in the morning, then mostly sunny in the afternoon. Highs in the upper 70s. North winds around 5 mph, becoming west in the afternoon. Chance of rain 20 percent.
THURSDAY NIGHT
Mostly clear. Lows in the upper 50s. West winds around 5 mph.
FRIDAY
Sunny. Highs around 80. Northwest winds 5 to 10 mph.
FRIDAY NIGHT
Mostly clear. Less humid with lows in the lower 50s. North winds 5 to 10 mph.
SATURDAY
Sunny. Highs in the lower 70s.
SATURDAY NIGHT
Mostly clear. Lows around 50.
SUNDAY
Mostly sunny. Highs in the upper 60s.
SUNDAY NIGHT
Partly cloudy. Lows in the lower 50s.
MONDAY
Mostly sunny. Highs in the lower 70s.
MONDAY NIGHT
Partly cloudy. Lows in the upper 50s.
TUESDAY
Mostly sunny. Highs in the upper 70s.
TUESDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the lower 60s.

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  9/17/2025
Thursday
18 SEP 2025
GROTON, CT 06340 weather forecast Day 1, 0 hours 2 AM 62° 62° Mostly Cloudy 31%
RAIN
.01–.1 in
0% Thunder
( 11% severe)
NNE   6 100% 62°
Low 60° GROTON, CT 06340 weather forecast Day 1, 3 hours 5 AM 61° 61° Mostly Cloudy N   6 100% 61°
High 75° GROTON, CT 06340 weather forecast Day 1, 6 hours 8 AM 63° 63° Mostly Cloudy 5%

0% Thunder
( 1% severe)
N   6 100% 63°

Mostly Cloudy



GROTON, CT 06340 weather forecast Day 1, 9 hours 11 AM 68° 68° Mostly Cloudy N   6 87% 64°
GROTON, CT 06340 weather forecast Day 1, 12 hours 2 PM 73° 73° Partly Cloudy 4%

0% Thunder
( 3% severe)
SW   5 79% 66°
GROTON, CT 06340 weather forecast Day 1, 15 hours 5 PM 72° 72° Partly Cloudy SW   6 79% 65°
GROTON, CT 06340 weather forecast Day 1, 18 hours 8 PM 66° 66° Clear 0%

0% Thunder
( 1% severe)
SW   5 97% 65°
GROTON, CT 06340 weather forecast Day 1, 21 hours 11 PM 64° 65° Clear W   5 100% 64°
Friday
19 SEP 2025
GROTON, CT 06340 weather forecast Day 2, 0 hours 2 AM 61° 61° Clear 0%

0% Thunder
( 0% severe)
W   5 100% 61°
Low 58° GROTON, CT 06340 weather forecast Day 2, 3 hours 5 AM 59° 58° Clear NW   6 96% 58°
High 78° GROTON, CT 06340 weather forecast Day 2, 6 hours 8 AM 64° 64° Clear 0%

0% Thunder
( 1% severe)
NNW   7 87% 60°

Partly Cloudy



GROTON, CT 06340 weather forecast Day 2, 9 hours 11 AM 74° 74° Clear NW   9 66% 62°
GROTON, CT 06340 weather forecast Day 2, 12 hours 2 PM 78° 80° Partly Cloudy 1%

0% Thunder
( 1% severe)
WNW   9 60% 63°
GROTON, CT 06340 weather forecast Day 2, 15 hours 5 PM 75° 75° Partly Cloudy NW   8 62% 61°
GROTON, CT 06340 weather forecast Day 2, 18 hours 8 PM 68° 68° Clear 1%

0% Thunder
( 0% severe)
N   6 73% 59°
GROTON, CT 06340 weather forecast Day 2, 21 hours 11 PM 62° 61° Partly Cloudy NNE   8 72% 53°

GROTON, CT extended weather forecast

Saturday
20 SEP 2025
Sunday
21 SEP 2025
Monday
22 SEP 2025
Tuesday
23 SEP 2025
Wednesday
24 SEP 2025
Low 55° Low 51° Low 50° Low 57° Low 62°
High 68° High 68° High 70° High 79° High 74°
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
Clear
5% Rain
Clear
9% Rain
Clear
14% Rain
Partly Cloudy
24% Rain
Partly Cloudy
30% Rain
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