Greenwich Weather in May

What's the weather like in Greenwich (Connecticut) in May 2025?

The climate in Greenwich during May can be summarized as mild and wet.

May is in the spring in Greenwich and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 21°C (70°F), whilst at night 8°C (46°F) is normal.

Greenwich weather averages (imperial / metric)
Daytime temperature 21°C 69.7°F
Nightly temperature 7.9°C 46.1°F
Average temperature 14.4°C 57.9°F
Daily sunshine 8.9 hrs
Avg rainfall 126 mm 5 ins
Rainy days 11 days
Sea temperature 10.5°C 51°F
Humidity 67%
Windspeed 18kph 11 mph

On average May is the wettest month of the year in Greenwich with around 126mm 5 inches of rain making it a wet time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.9 hours of sunshine per day.

May temperatures in Greenwich

Greenwich average temperature in May

May rainfall

Greenwich average rain in May

May hourly sunshine

Greenwich average rain in May

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Greenwich in May 2025.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Greenwich weather stats

Greenwich weather statistics
Hottest month: July 28.4°C 83.1°F
Driest month: February 90mm 3.5ins
Sunniest month: August 9.1hrs
Coldest month: January 2.3°C 36.1°F
Wettest month: May 126mm 5ins
Map showing location of Greenwich (41.02649, -73.62846) Greenwich map pin © Google

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