United States · 1991–2020 normal
Groton in
September.
Typical September weather in Groton: 23°C by day, 14°C at night, 113 mm of rain over 7 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high23°C
Typical low14°C
Rain113 mm
Wet days7
Comfort score 80 this month (June leads the year at 87). Daylight is calculated as 12 h 25 from latitude 41.35°. Open-water sea temperature is 20.1°C (25 km from the place centre).
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4835461
- NOAA station
- USC00063207 · GROTON
- Station distance
- 3.4 km from the place centre
- Coverage
- Strong coverage · 26 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.