September weather forecast and climate
Greenwich, CT

What is the temperature in September in Greenwich?

The average high-temperature, in September, is 73°F (22.8°C), while the average low-temperature is 55.9°F (13.3°C).

How much does it rain in Greenwich in September?

Throughout September, in Greenwich, 4.7" (119.4mm) of precipitation is accumulated.
Average temperature in September - Greenwich, CT
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (83°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 56°F

The month with the highest average low temperature is July (65°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average rainfall in September - Greenwich, CT
  • Average rainfall in September: 4.7"

Wettest months (with the highest rainfall) are March and September (4.7").
The driest month (with the lowest rainfall) is February (3.2").

Average snowfall in September - Greenwich, CT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (8.3").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average sea temperature in September - Greenwich, CT
  • Average sea temperature in September: 68.9°F

The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).

Average daylight in September - Greenwich, CT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

deutscheenglishespañolрусский中文