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Groton
FallPeak season ~73°F highs
Things to do in Groton in September
September is one of the best months to visit Groton, with average highs around 73°F. Crisp air and changing leaves make parks and viewpoints shine.
Best picks for September
What's famous here, weighted toward what shines in September.
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Holidays in September 2027
- Labour Day · Mon, Sep 6
Expect busier roads and pricier stays around these dates. See long weekends.
Also great in September in Connecticut
Groton in September: quick answers
Is September a good time to visit Groton?
September is one of the best months to visit Groton, with average highs around 73°F. Crisp air and changing leaves make parks and viewpoints shine.
What is the weather like in Groton in September?
Average daytime highs are around 73°F, compared with 80°F in the warmest month. Check the forecast a week out; our planner favors indoor stops on rainy days.
What are the best things to do in Groton in September?
Top picks for September: USS Nautilus, Connecticut College Arboretum, Gillette Castle State Park, Hammonasset Beach State Park, Harkness Memorial State Park.
