Best time to visit Groton, CT
A month-by-month travel weather guide based on NOAA 30-year climate normals.
The most comfortable travel window in Groton runs from April through October — 7 months of pleasant temperatures and modest rainfall.
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 20m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 10h 24m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 11h 43m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 13h 7m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 14h 19m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 14h 56m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 14h 42m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 13h 40m
Sweet spot — comfortable highs in the 65-80°F range, mild nights, low rain. Ideal for nearly any outdoor plan.
Daylight ≈ 12h 16m
Comfortable for most activities. Bring layers; nights can be cool.
Daylight ≈ 10h 52m
Mild but on the chilly side. Pack a jacket; great for hiking and city walks.
Daylight ≈ 9h 38m
Winter weather. Plan around weather; good for snow sports if applicable.
Daylight ≈ 9h 2m
Looking for similar climates? See Groton's climate twins. Or jump straight to the full climate profile.