As of 18:33 EDT

Weather in Old Lyme, CT

50°

Old Lyme, Tuesday, 27 October, 18:33

Clear. Feels like 50°. High 58°, low 44°.

Pressure30.36 inHg

Wind0 mph N

Humidity64%

Visibility6.2 mi

Dew point38°

See detailed hourly forecast

Monthly outlook for Old Lyme, CT: average high 58.2°, average low 44.5°. That is 1.4° above the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (69.9°), the coolest 1 November (33.9°).

58.2°/44.5°

Average high / low

+1.4°

Above normal

4 / 5

Wet days / normal

1.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
27 October – 5 November	60.4°	56.7°	+2.1°
6 November – 15 November	54.5°	52.6°	+1.1°
16 November – 25 November	at normal	49°	—

October records over 66 years

80.6°2 October 2019All-time high

29.1°31 October 2020All-time low

Wed, 2861° / 38°

61 °

Old Lyme, Wednesday, 28 October

Overcast. High 61°, low 38°.

Pressure30.47 inHg

Wind1.5 mph S

Humidity50%

Visibility6.2 mi

Dew point36°

Thu, 2965° / 46°

65 °

Old Lyme, Thursday, 29 October

Clear. High 65°, low 46°.

Pressure30.24 inHg

Wind8.5 mph SW

Humidity64%

Visibility6.2 mi

Dew point51°

Fri, 3070° / 49°

70 °

Old Lyme, Friday, 30 October

Clear. High 70°, low 49°.

Pressure30.03 inHg

Wind8.7 mph NW

Humidity55%

Visibility6.2 mi

Dew point52°

Sat, 3156° / 40°

56 °

Old Lyme, Saturday, 31 October

Partly cloudy. High 56°, low 40°.

Pressure30.36 inHg

Wind10.5 mph NW

Humidity44%

Visibility6.2 mi

Dew point32°

Sun, 0162° / 34°

62 °

Old Lyme, Sunday, 1 November

Clear. High 62°, low 34°.

Pressure30.42 inHg

Wind7.8 mph SW

Humidity55%

Visibility—

Dew point37°

Mon, 0257° / 46°

0.03

57 °

Old Lyme, Monday, 2 November

Light rain. High 57°, low 46°.

Pressure30.27 inHg

Wind6 mph SW

Humidity82%

Visibility—

Dew point46°

Tue, 0358° / 52°

0.07

58 °

Old Lyme, Tuesday, 3 November

Light rain. High 58°, low 52°.

Pressure30.24 inHg

Wind21.5 mph E

Humidity91%

Visibility—

Dew point54°

Wed, 0455° / 50°

0.08

55 °

Old Lyme, Wednesday, 4 November

Light rain. High 55°, low 50°.

Pressure30.45 inHg

Wind22.3 mph E

Humidity75%

Visibility—

Dew point45°

Thu, 0562° / 55°

0.69

62 °

Old Lyme, Thursday, 5 November

Rain. High 62°, low 55°.

Pressure30.00 inHg

Wind23 mph E

Humidity99%

Visibility—

Dew point60°

Fri, 0662° / 56°

0.11

62 °

Old Lyme, Friday, 6 November

Light rain. High 62°, low 56°.

Pressure29.56 inHg

Wind18.1 mph SW

Humidity94%

Visibility—

Dew point60°

Sat, 0756° / 46°

56 °

Old Lyme, Saturday, 7 November

Light rain. High 56°, low 46°.

Pressure29.80 inHg

Wind14.4 mph N

Humidity73%

Visibility—

Dew point47°

Sun, 0848° / 38°

48 °

Old Lyme, Sunday, 8 November

Clear. High 48°, low 38°.

Pressure30.24 inHg

Wind15.3 mph NE

Humidity55%

Visibility—

Dew point27°

Mon, 0950° / 37°

50 °

Old Lyme, Monday, 9 November

Partly cloudy. High 50°, low 37°.

Pressure30.27 inHg

Wind9.3 mph N

Humidity43%

Visibility—

Dew point22°

Tue, 1056° / 40°

56 °

Old Lyme, Tuesday, 10 November

Overcast. High 56°, low 40°.

Pressure30.18 inHg

Wind10.2 mph N

Humidity42%

Visibility—

Dew point25°

Wed, 1157° / 43°

57 °

Old Lyme, Wednesday, 11 November

Clear. High 57°, low 43°.

Pressure30.15 inHg

Wind12 mph NE

Humidity46%

Visibility—

Dew point30°

From day 17 onward the outlook is built from 60-year climate statistics

Thu, 1252° / 41°

0.16

52 °

Old Lyme, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high52°

Average low41°

Average precipitation0.16 in

Chance of precipitation38%

Record high71° (2022)

Record low28° (2019)

Fri, 1351° / 40°

0.21

51 °

Old Lyme, Friday, 13 November

Climate normal for this date — 60-year average.

Average high51°

Average low40°

Average precipitation0.21 in

Chance of precipitation40%

Record high65° (1964)

Record low22° (2019)

Sat, 1450° / 40°

0.09

50 °

Old Lyme, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high50°

Average low40°

Average precipitation0.09 in

Chance of precipitation22%

Record high62° (1989)

Record low25° (1986)

Sun, 1551° / 40°

0.13

51 °

Old Lyme, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high51°

Average low40°

Average precipitation0.13 in

Chance of precipitation42%

Record high67° (1993)

Record low24° (1967)

Mon, 1651° / 40°

0.15

51 °

Old Lyme, Monday, 16 November

Climate normal for this date — 60-year average.

Average high51°

Average low40°

Average precipitation0.15 in

Chance of precipitation35%

Record high64° (2001)

Record low23° (1967)

Tue, 1750° / 40°

0.15

50 °

Old Lyme, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high50°

Average low40°

Average precipitation0.15 in

Chance of precipitation28%

Record high65° (2024)

Record low26° (2019)

Wed, 1850° / 40°

0.08

50 °

Old Lyme, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high50°

Average low40°

Average precipitation0.08 in

Chance of precipitation23%

Record high63° (2024)

Record low27° (2020)

Thu, 1950° / 39°

0.06

50 °

Old Lyme, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high50°

Average low39°

Average precipitation0.06 in

Chance of precipitation23%

Record high62° (2021)

Record low24° (1986)

Fri, 2049° / 39°

0.13

49 °

Old Lyme, Friday, 20 November

Climate normal for this date — 60-year average.

Average high49°

Average low39°

Average precipitation0.13 in

Chance of precipitation32%

Record high64° (1985)

Record low20° (1986)

Sat, 2149° / 38°

0.11

49 °

Old Lyme, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high49°

Average low38°

Average precipitation0.11 in

Chance of precipitation30%

Record high60° (2020)

Record low20° (1987)

Sun, 2248° / 38°

0.15

48 °

Old Lyme, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high48°

Average low38°

Average precipitation0.15 in

Chance of precipitation37%

Record high60° (1994)

Record low15° (2018)

Mon, 2347° / 37°

0.13

47 °

Old Lyme, Monday, 23 November

Climate normal for this date — 60-year average.

Average high47°

Average low37°

Average precipitation0.13 in

Chance of precipitation25%

Record high60° (1992)

Record low15° (2018)

Tue, 2448° / 38°

0.1

48 °

Old Lyme, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high48°

Average low38°

Average precipitation0.1 in

Chance of precipitation30%

Record high62° (1979)

Record low19° (1989)

Wed, 2548° / 37°

0.15

48 °

Old Lyme, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high48°

Average low37°

Average precipitation0.15 in

Chance of precipitation27%

Record high62° (1979)

Record low22° (2013)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Old Lyme, CT are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Old Lyme, CT since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.