Greenwich
Connecticut, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and Climate
Greenwich, CT

  • The average high temperature in September: 22.8°C

The warmest month (with the highest average high temperature) is July (28.3°C).
The month with the lowest average high temperature is January (2.2°C).

  • The average low temperature in September: 13.3°C

The month with the highest average low temperature is July (18.3°C).
The coldest month (with the lowest average low temperature) is January (-6.1°C).

  • The average rainfall in September: 119.4mm

The wettest month (with the highest rainfall) is March (120.1mm).
The driest month (with the lowest rainfall) is February (82.3mm).

  • The average snowfall in September: 0mm

The month with the highest snowfall is February (210.8mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

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