GROTON, CT 06340 Weather Forecast & Current Conditions

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GROTON, CT
Current Weather

2:56 AM EDT AUG 5, 2026
Clear
61°F
Feels Like: 61°F
Dewpoint: 61°F
Rel. Hum.: 100%
Visibility: 10 miles
Wind: Calm
Pressure: 30.12 inches
Last 72 hours

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GROTON, CT 06340
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly sunny. Highs in the lower 80s. West winds around 5 mph, becoming southwest around 5 mph this afternoon.
TONIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Humid with lows in the upper 60s. Southwest winds around 5 mph.
THURSDAY
Mostly cloudy in the morning, then mostly sunny with a slight chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. Southwest winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 20 percent. Heat index values up to 101.
THURSDAY NIGHT
Partly cloudy. A slight chance of showers in the evening. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Chance of rain 20 percent.
FRIDAY
Partly sunny. A slight chance of showers and thunderstorms in the afternoon. Humid with highs in the upper 80s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 103.
FRIDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the lower 70s. Chance of rain 40 percent.
SATURDAY
Mostly sunny. Highs in the mid 80s. Heat index values in the upper 90s.
SATURDAY NIGHT
Partly cloudy. Lows in the lower 70s.
SUNDAY
Sunny. Highs in the upper 80s. Heat index values in the mid 90s.
SUNDAY NIGHT
Mostly clear. Lows in the upper 60s.
MONDAY
Sunny. Highs in the mid 80s.
MONDAY NIGHT
Partly cloudy. Lows in the upper 60s.
TUESDAY
Partly sunny. A chance of showers in the afternoon. Highs in the mid 80s. 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  8/ 4/2026
Wednesday
5 AUG 2026
GROTON, CT 06340 weather forecast Day 1, 0 hours 2 AM 64° 66° Partly Cloudy 2%

0% Thunder
( 0% severe)
  CALM 93% 62°
Low 62° GROTON, CT 06340 weather forecast Day 1, 3 hours 5 AM 63° 64° Partly Cloudy   CALM 93% 61°
High 81° GROTON, CT 06340 weather forecast Day 1, 6 hours 8 AM 70° 70° Partly Cloudy 1%

0% Thunder
( 0% severe)
  CALM 81% 64°

Partly Cloudy



GROTON, CT 06340 weather forecast Day 1, 9 hours 11 AM 79° 81° Partly Cloudy SSW   5 64% 66°
GROTON, CT 06340 weather forecast Day 1, 12 hours 2 PM 81° 83° Partly Cloudy 3%

0% Thunder
( 3% severe)
SSW   8 60% 66°
GROTON, CT 06340 weather forecast Day 1, 15 hours 5 PM 80° 83° Partly Cloudy SSW   7 67% 68°
GROTON, CT 06340 weather forecast Day 1, 18 hours 8 PM 75° 75° Partly Cloudy 10%
RAIN
<.01 in
0% Thunder
( 5% severe)
SSW   5 82% 69°
GROTON, CT 06340 weather forecast Day 1, 21 hours 11 PM 73° 73° Mostly Cloudy SSW   5 93% 71°
Thursday
6 AUG 2026
GROTON, CT 06340 weather forecast Day 2, 0 hours 2 AM 73° 73° Mostly Cloudy 16%
RAIN
<.01 in
0% Thunder
( 3% severe)
SSW   5 97% 72°
Low 68° GROTON, CT 06340 weather forecast Day 2, 3 hours 5 AM 73° 73° Mostly Cloudy S   5 100% 73°
High 85° GROTON, CT 06340 weather forecast Day 2, 6 hours 8 AM 76° 76° Mostly Cloudy 4%

0% Thunder
( 8% severe)
SSW   6 94% 74°

Decreasing Clouds



GROTON, CT 06340 weather forecast Day 2, 9 hours 11 AM 82° 89° Mostly Cloudy SSW   9 79% 75°
GROTON, CT 06340 weather forecast Day 2, 12 hours 2 PM 85° 96° Partly Cloudy 3%

0% Thunder
( 17% severe)
SSW   10 77% 77°
GROTON, CT 06340 weather forecast Day 2, 15 hours 5 PM 84° 93° Clear SSW   12 77% 76°
GROTON, CT 06340 weather forecast Day 2, 18 hours 8 PM 79° 83° Partly Cloudy 9%

0% Thunder
( 11% severe)
SSW   8 85% 74°
GROTON, CT 06340 weather forecast Day 2, 21 hours 11 PM 76° 76° Partly Cloudy SW   7 94% 74°

GROTON, CT extended weather forecast

Friday
7 AUG 2026
Saturday
8 AUG 2026
Sunday
9 AUG 2026
Monday
10 AUG 2026
Tuesday
11 AUG 2026
Low 71° Low 72° Low 70° Low 70° Low 70°
High 87° High 84° High 86° High 84° High 83°
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
45% Rain
Mostly Cloudy
69% Rain
Partly Cloudy
18% Rain
Partly Cloudy
26% Rain
Partly Cloudy
33% Rain
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