What is today's weather forecast for South Lyme, CT?

Today's forecast for South Lyme shows a high of 45 degrees and a low of 28 degrees Fahrenheit. Mostly sunny, with a high near 45.

What is the 7-day weather forecast for South Lyme, CT?

The 7-day forecast for South Lyme shows highs from 36 to 51 degrees and lows from 23 to 33 degrees Fahrenheit. Expect precipitation on 3 days with chances of 20% or higher.

Will it rain in South Lyme, CT this week?

Yes, rain is possible in South Lyme this week. Precipitation chances: Thursday (90% chance), Friday (90% chance), Tuesday (40% chance).

How accurate is the South Lyme weather forecast?

WeatherForYou provides highly accurate South Lyme forecasts using National Weather Service data and current conditions from the nearest available weather stations, often miles closer than regional airports, for the most precise local forecasts.

South Lyme, CT Weather Forecast and Current Conditions

Current Conditions From Nearby Local Station

Switch to Metric Units

41°F
Feels Like 38°F

Humidity 71% Dew Point 32°F Wind WSW 4 MPH Gusts 6 Barometer 30.03 in.

Solar Rad 75 w/m²

Report from a personal weather station 0.7 mi. N of central South Lyme
at 9:43 AM Wed, Dec 17, 2025

Point Forecast at a Glance

WedDec 17

ThuDec 18

FriDec 19

90%

SatDec 20

SunDec 21

MonDec 22

TueDec 23

40%

Jump to detailed forecast ↓

7-Day Temperature Trend

Week Ahead Summary

Variable high temperatures through the week, ranging from 36°F to 51°F. Some precipitation possible with wintry mix on at least one day.

Climate Context

Temperatures are expected to be near normal for this time of year, with highs around 44°F and lows around 28°F.

This Date in Weather History

1929 - An icestorm in western New York State resulted in much damage and hardship. A Buffalo report stated, "one was kept awake by the breaking limbs, which snapped off with a report much louder than a rifle shot."

South Lyme, CT 7 Day Weather Forecast Details

Wednesday Dec 17

Day: Mostly sunny, with a high near 45. Southwest wind 11 to 15 mph, with gusts as high as 25 mph.

Night: Mostly clear, with a low around 28. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 21 mph.

Thursday Dec 18

Day: Mostly sunny, with a high near 51. Calm wind becoming south 5 to 8 mph in the morning.

Night: Showers, mainly after 1am. Temperature rising to around 50 by 3am. South wind 7 to 17 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Friday Dec 19

Day: Showers and possibly a thunderstorm. Temperature rising to near 54 by 10am, then falling to around 45 during the remainder of the day. Breezy, with a south wind 17 to 25 mph becoming west in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

Night: Partly cloudy, with a low around 26. Breezy.

Saturday Dec 20

Day: Mostly sunny, with a high near 43.

Night: Mostly cloudy, with a low around 33.

Sunday Dec 21

Day: Partly sunny, with a high near 47.

Night: Partly cloudy, with a low around 26.

Monday Dec 22

Day: Mostly sunny, with a high near 36.

Night: Partly cloudy, with a low around 23.

Tuesday Dec 23

Day: A chance of rain and snow. Partly sunny, with a high near 41. Chance of precipitation is 40%.

How We Provide Better Local Weather

Current conditions: We use the nearest available station to your location - including professional MESONET/MADIS and local weather stations - often miles closer than regional airports.

Forecasts: National Weather Service point forecasts predict for your specific area, not broad regional zones, making them far more relevant to your location.

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