Greenwich (CT) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Greenwich.
Climate overview of Greenwich
Temperatures in Greenwich, Connecticut, United States of America, vary greatly throughout the year. July is the hottest month at 29°C (84°F), while February is the coldest at 4°C (39°F).
The city receives considerable rain/snowfall, with around 1221 mm (48 in) annually. June is the wettest month. July is the sunniest month, averaging 9.0 hours of sunshine per day.
Greenwich Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Greenwich — and find the best time to visit.
Monthly Temperature in Greenwich
The climate in Greenwich is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a comfortable 29°C (84°F) in July to a chilly 4°C (39°F) in the coolest month, February.
Nights vary from 20°C (68°F) in July to around -5°C (23°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Greenwich
Greenwich has a notably wet climate with abundant precipitation, recording 1221 mm (48 in) of rain/snowfall per year. Greenwich offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month June (130 mm (5.1 in)) and the driest month November (77 mm (3 in)) is not too significant. For more details, please visit our Greenwich Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Greenwich
For those who appreciate different seasons, Greenwich serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 9.0 hours of sunshine daily, and embrace the darker days in December, offering only 4.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Greenwich by Month
The relative humidity is high throughout the year in Greenwich.
The city experiences its highest humidity in September, reaching 68%. In April, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Greenwich
Frequently asked questions about the climate in Greenwich
What is the best time to visit Greenwich?
July typically offers the most optimal weather in Greenwich. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Greenwich?
Daytime highs range from 4°C (39°F) in February to 29°C (84°F) in July. Nighttime lows range from -5°C (23°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Greenwich get?
Annual rainfall is around 1221 mm (48 in). June is the wettest month with 130 mm (5.1 in), while November is the driest with 77 mm (3 in).
How sunny is Greenwich?
Greenwich receives around 2,544 hours of sunshine per year. July is the sunniest month with 271 hours, while December is the cloudiest with just 141 hours. Overall, Greenwich enjoys abundant sunshine.
Greenwich 3-Day Forecast
Greenwich (CT) 3-Day Forecast
Greenwich on the map
Greenwich is highlighted — select any city to see its climate.
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