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Groton, CT Weather Forecast


Groton, CT Weather Forecast Dated: 147 PM Sat Sep 19 2026
Expect a cool pattern with more clouds than sun and occasional showers over the coming period. generally humid conditions and a stable pattern will dominate.
Saturday, September 19, 2026
Mid-Morning
60°F 15°C
Cloudy
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
64°F 18°C
Overcast
Refreshing around 64°F 18°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure. Winds turning from the NE to the SE at 11 mph 17 km/h.
Sunday, September 20, 2026
Mid-Morning
64°F 18°C
Overcast
Mid-Afternoon
66°F 19°C
Scattered Showers
Early-Evening
67°F 19°C
Light Rain
Mildly cool near 66°F 19°C, scattered downpours possible, with increasing humidity and barometric pressure falling. Winds switching from the SE to the S at 13 mph 19 km/h.
Monday, September 21, 2026
Mid-Morning
59°F 15°C
Scattered Showers
Mid-Afternoon
63°F 17°C
Scattered Showers
Early-Evening
62°F 17°C
Scattered Showers
Comfortable at 63°F 17°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds moving from the NNE to the ENE at 16 mph 26 km/h. Gusts up to 21 mph 33 km/h.
Tuesday, September 22, 2026
Mid-Morning
56°F 13°C
Rain
Mid-Afternoon
57°F 14°C
Light Showers
Early-Evening
58°F 14°C
Light Showers
Crisp with a high near 57°F 14°C, rounds of showers expected off and on all day, with lower humidity and steady pressure. Winds out of the ENE at 23 mph 36 km/h. Gusts up to 30 mph 47 km/h.
Wednesday, September 23, 2026
Mid-Morning
60°F 16°C
Scattered Showers
Mid-Afternoon
62°F 17°C
Overcast
Early-Evening
61°F 16°C
Scattered Showers
Refreshing around 62°F 17°C, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the ENE to the NE at 26 mph 41 km/h. Gusts up to 33 mph 52 km/h.
Thursday, September 24, 2026
Mid-Morning
60°F 16°C
Light Showers
Mid-Afternoon
59°F 15°C
Light Showers
Early-Evening
59°F 15°C
Light Showers
Mildly cool near 59°F 15°C, on-and-off showers throughout the day, with steady humidity and barometric pressure falling. Winds turning from the NE to the NNE at 26 mph 41 km/h. Gusts up to 39 mph 62 km/h.
Friday, September 25, 2026
Mid-Morning
56°F 14°C
Sunny
Mid-Afternoon
63°F 17°C
Cloudy
Early-Evening
61°F 16°C
Overcast
Comfortable at 63°F 17°C, cloudy through the afternoon, turning overcast this evening, with lower humidity and steady pressure. Winds switching from the NNE to the NE at 12 mph 19 km/h.
Saturday, September 26, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
67°F 20°C
Sunny
Early-Evening
62°F 17°C
Sunny
Cool with a high near 67°F 20°C, sunny throughout the day, with steady humidity and steady pressure. Winds blowing from the ENE at 15 mph 24 km/h. Gusts up to 22 mph 35 km/h.
Sunday, September 27, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
67°F 19°C
Overcast
Early-Evening
62°F 17°C
Overcast
Refreshing around 67°F 19°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds ENE at 18 mph 30 km/h. Gusts up to 23 mph 38 km/h.
Monday, September 28, 2026
Mid-Morning
58°F 14°C
Overcast
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
62°F 16°C
Overcast
Mildly cool near 65°F 18°C, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds shifting from the NNE to the NE at 19 mph 30 km/h. Gusts up to 29 mph 46 km/h.
Tuesday, September 29, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
63°F 17°C
Cloudy
Early-Evening
63°F 18°C
Overcast
Comfortable at 63°F 17°C, overcast throughout the day, with steady humidity and steady pressure. Winds turning from the NNE to the NE at 14 mph 22 km/h. Gusts up to 25 mph 40 km/h.
Wednesday, September 30, 2026
Mid-Morning
60°F 16°C
Overcast
Mid-Afternoon
69°F 20°C
Overcast
Early-Evening
63°F 17°C
Overcast
Comfortable with temperatures reaching 69°F 20°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and steady pressure. Winds switching from the NNE to the NE at 16 mph 26 km/h. Gusts up to 25 mph 40 km/h.
Thursday, October 1, 2026
Mid-Morning
59°F 15°C
Scattered Showers
Mid-Afternoon
60°F 16°C
Scattered Showers
Early-Evening
58°F 15°C
Cloudy
Refreshing around 60°F 16°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds out of the NE at 21 mph 34 km/h. Gusts up to 26 mph 41 km/h.
Friday, October 2, 2026
Mid-Morning
59°F 15°C
Overcast
Mid-Afternoon
65°F 18°C
Sunny
Early-Evening
61°F 16°C
Overcast
Mildly cool near 65°F 18°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the NE at 11 mph 18 km/h.
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