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Shaded-relief atlas plate of Old Lyme, Connecticut: rivers, roads, the city limits and where the water drains.
CONNECTICUT · LOWER CONNECTICUT RIVER VALLEY PLANNING REGION

Old Lyme

7,721 people, 50 ft above sea level in Lower Connecticut River Valley Planning Region.

50 ftElevation, city center
7,721People, 2024 estimate
23 sq miLand area
Sunny 70°
Sunny now Dew point 59° · WNW 6 mph · high 68°
City of Old Lyme River Interstate 2 miles
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The Old Lyme plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Old Lyme

NWS forecast and National Blend of Models · updated 2:00 PM EDT
RIGHT NOW Chester Airport (KSNC) · 2:55 PM
Sunny
70° Sunny Feels like 70° · high of 68° near 3 PM
WindWNW 6 mphno gusts
Humidity69%rising to 100% by morning
Pressure29.96 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 59° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Showers
Friday40% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINSept. 281 in · 1 dry day
ALERTS & OUTLOOKS
No watches or warnings for Lower Connecticut River Valley Planning Region
NWS Upton and the Storm Prediction Center · checked 3:16 PM
SUN & MOON
↑ 6:43 AM6:35 PM ↓
11 h 51 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
17
GOODAir quality index · ozone
Tomorrow: 44, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
partly cloudy day
partly cloudy night
partly cloudy night
mostly clear night
mostly clear night
mostly sunny
mostly sunny
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
mostly cloudy night
mostly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
TEMPERATURE °F
68°
55°
70°
61°
73°
64°
CHANCE OF RAIN
50%
WIND, MPH
0
0
0
0
0
0
0
0
0
0
0
0
0
0
4
7
7
5
3
4
5
5
5
7
HOW IT FEELS · DEW POINT
Sticky: dew points 55 to 66°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
TUE Sept. 29 Partly cloudy Partly cloudy
68° 55°
0% rain — NW 1 A
WED Sept. 30 Mostly sunny Mostly sunny
73° 59°
0% rain — NNW 0 A
THU Oct. 1 Partly cloudy Partly cloudy
76° 64°
0% rain — SW 5 B
FRI Oct. 2 Chance of showers Chance of showers
80° 60°
40% rain up to 0.1″ W 6 A
SAT Oct. 3 Partly cloudy; cooler Partly cloudy; cooler
70° 51°
20% rain — E 5 C
SUN Oct. 4 Chance of showers Chance of showers
64° 52°
40% rain up to 1.1″ ESE 5 C
MON Oct. 5 Mostly sunny Mostly sunny
64° 45°
10% rain — NW 6 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Old Lyme about 5,000 feet above the ground was over the Atlantic off the Carolinas three days ago, and over the western Atlantic a day ago, about 1,390 miles back along its path. The nine paths traced from around the city fan out, so treat that as a best guess. It rose from near the ground on the way. Near the ground the air came from Canada; at 10,000 feet, from the Great Lakes. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE7
ON THE NETWORK

Around Old Lyme on the Forecast Network

Neighboring plates

New Haven CT · 32 MI 32 miles west Hartford CT · 37 MI 37 miles northwest Brookhaven NY · 46 MI 46 miles southwest Hempstead NY · 83 MI 83 miles southwest New York NY · 96 MI 96 miles southwest Boston MA · 97 MI 97 miles northeast
FORECASTCITY
Atlas plate of Old Lyme, Connecticut. Explore the plate
CONNECTICUT · LOWER CONNECTICUT RIVER VALLEY

Old Lyme

7,721 people, 50 ft above sea level in Lower Connecticut River Valley Planning Region.

50 ftElevation
7,721People
23 sq miLand
Sunny 70°
SunnyDew point 59°
1

Today in Old Lyme

NEXT 15 HOURS
Now partly cloudy day 68° 1%
6p partly cloudy day 66° 1%
9p partly cloudy night 61° 1%
12a mostly clear night 58° 0%
3a mostly clear night 56° 0%
6a mostly clear night 55° 0%
Showers
NEXT RAINFriday · 40%
→
Tue0%
Partly cloudy Partly cloudy
55
68
A
Wed0%
Mostly sunny Mostly sunny
59
73
A
Thu0%
Partly cloudy Partly cloudy
64
76
B
Fri40%
Chance of showers Chance of showers
60
80
A
Sat20%
Partly cloudy; cooler Partly cloudy; cooler
51
70
C
Sun40%
Chance of showers Chance of showers
52
64
C
Mon10%
Mostly sunny Mostly sunny
45
64
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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