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Old Greenwich, Connecticut Weather Forecast
Old Greenwich, Connecticut Weather
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Weather Forecast for Old Greenwich, Connecticut : Fairfield County
Issued: 1:01 am EST Dec 15, 2025 Latitude: 41.022875 Longitude: -73.564846 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Partly Sunny on This Afternoon Mostly Cloudy on Tonight Sunny on Tuesday Mostly Sunny on Wednesday Partly Sunny on Thursday 30% chance of rain on Friday Partly Sunny on Saturday 30% chance of rain on Sunday
High: 29°F Low: 21°F High: 32°F High: 42°F High: 52°F High: 51°F High: 40°F High: 46°F
Low: 28°F Low: 29°F Low: 45°F Low: 24°F Low: 35°F  
Partly Sunny Mostly Cloudy Sunny Mostly Sunny Partly Sunny Rain Partly Sunny Rain
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Partly Sunny on This Afternoon This Afternoon... Partly sunny, with a high near 29. Wind chill values between 15 and 20. West wind 11 to 14 mph.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 21. Wind chill values between 15 and 20. West wind around 10 mph.

Sunny on Tuesday Tuesday... Sunny, with a high near 32. Wind chill values between 10 and 20. West wind around 7 mph.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a steady temperature around 28. Wind chill values between 15 and 20. Southwest wind 8 to 10 mph.

Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 42. Southwest wind 10 to 13 mph.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 29.

Partly Sunny on Thursday Thursday... Partly sunny, with a high near 52.

90% chance of rain Thursday Night Thursday Night... Rain. Low around 45. Breezy. Chance of precipitation is 90%.

30% chance of rain Friday Friday... A 30 percent chance of rain before 1pm. Partly sunny, with a high near 51. Breezy.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 24.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 40.

30% chance of rain Saturday Night Saturday Night... A 30 percent chance of rain. Mostly cloudy, with a low around 35.

30% chance of rain Sunday Sunday... A 30 percent chance of rain. Mostly cloudy, with a high near 46.

Sun Almanac for Old Greenwich, Connecticut
Sunrise: 07:12 AM
Sunset: 4:27 PM
Civil Sunrise:06:41 AM
Civil Sunset: 4:58 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 5:32 PM
Astro Sunrise: 05:33 AM
Astro Sunset: 6:06 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.