As of 12:46 EDT

Weather in Old Lyme, CT

57°

Old Lyme, Saturday, 24 October, 12:46

Clear. Feels like 55°. High 58°, low 33°.

Pressure30.53 inHg

Wind5.7 mph N

Humidity46%

Visibility6.2 mi

Dew point37°

See detailed hourly forecast

Monthly outlook for Old Lyme, CT: average high 56.7°, average low 42.3°. That is 0.1° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 26 October (65.7°), the coolest 24 October (33.1°).

56.7°/42.3°

Average high / low

+0.1°

Above normal

0 / 5

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
24 October – 2 November	59°	57.5°	+0.9°
3 November – 12 November	52.9°	54.2°	-0.7°
13 November – 22 November	at normal	49.9°	—

October records over 66 years

80.6°2 October 2019All-time high

29.1°31 October 2020All-time low

Sun, 2565° / 36°

65 °

Old Lyme, Sunday, 25 October

Clear. High 65°, low 36°.

Pressure30.53 inHg

Wind1.7 mph NW

Humidity36%

Visibility6.2 mi

Dew point35°

Mon, 2666° / 39°

66 °

Old Lyme, Monday, 26 October

Mostly clear. High 66°, low 39°.

Pressure30.21 inHg

Wind5.5 mph W

Humidity44%

Visibility6.2 mi

Dew point40°

Tue, 2755° / 39°

55 °

Old Lyme, Tuesday, 27 October

Clear. High 55°, low 39°.

Pressure30.36 inHg

Wind6.4 mph N

Humidity44%

Visibility6.2 mi

Dew point31°

Wed, 2853° / 35°

53 °

Old Lyme, Wednesday, 28 October

Clear. High 53°, low 35°.

Pressure30.53 inHg

Wind3.4 mph E

Humidity52%

Visibility6.2 mi

Dew point34°

Thu, 2963° / 43°

63 °

Old Lyme, Thursday, 29 October

Partly cloudy. High 63°, low 43°.

Pressure30.36 inHg

Wind9.9 mph SW

Humidity64%

Visibility—

Dew point45°

Fri, 3065° / 53°

65 °

Old Lyme, Friday, 30 October

Clear. High 65°, low 53°.

Pressure30.06 inHg

Wind15 mph N

Humidity70%

Visibility—

Dew point50°

Sat, 3156° / 44°

56 °

Old Lyme, Saturday, 31 October

Overcast. High 56°, low 44°.

Pressure30.42 inHg

Wind19.7 mph NE

Humidity53%

Visibility—

Dew point35°

Sun, 0156° / 42°

56 °

Old Lyme, Sunday, 1 November

Overcast. High 56°, low 42°.

Pressure30.50 inHg

Wind14.7 mph NE

Humidity63%

Visibility—

Dew point37°

Mon, 0254° / 42°

0.01

54 °

Old Lyme, Monday, 2 November

Light rain. High 54°, low 42°.

Pressure30.24 inHg

Wind13.8 mph NE

Humidity68%

Visibility—

Dew point40°

Tue, 0356° / 49°

56 °

Old Lyme, Tuesday, 3 November

Overcast. High 56°, low 49°.

Pressure29.77 inHg

Wind13.6 mph W

Humidity75%

Visibility—

Dew point45°

Wed, 0451° / 43°

0.01

51 °

Old Lyme, Wednesday, 4 November

Light rain. High 51°, low 43°.

Pressure29.85 inHg

Wind14.2 mph NW

Humidity56%

Visibility—

Dew point33°

Thu, 0548° / 37°

48 °

Old Lyme, Thursday, 5 November

Clear. High 48°, low 37°.

Pressure30.33 inHg

Wind16.1 mph NW

Humidity51%

Visibility—

Dew point26°

Fri, 0650° / 37°

50 °

Old Lyme, Friday, 6 November

Overcast. High 50°, low 37°.

Pressure30.53 inHg

Wind12 mph SW

Humidity49%

Visibility—

Dew point26°

Sat, 0756° / 49°

56 °

Old Lyme, Saturday, 7 November

Partly cloudy. High 56°, low 49°.

Pressure30.30 inHg

Wind17.5 mph W

Humidity57%

Visibility—

Dew point38°

Sun, 0858° / 54°

0.01

58 °

Old Lyme, Sunday, 8 November

Light rain. High 58°, low 54°.

Pressure30.06 inHg

Wind15.1 mph S

Humidity60%

Visibility—

Dew point42°

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

Mon, 0953° / 43°

0.09

53 °

Old Lyme, Monday, 9 November

Climate normal for this date — 60-year average.

Average high53°

Average low43°

Average precipitation0.09 in

Chance of precipitation22%

Record high67° (1975)

Record low26° (2019)

Tue, 1054° / 43°

0.18

54 °

Old Lyme, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high54°

Average low43°

Average precipitation0.18 in

Chance of precipitation40%

Record high65° (1999)

Record low27° (2017)

Wed, 1153° / 43°

0.16

53 °

Old Lyme, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high53°

Average low43°

Average precipitation0.16 in

Chance of precipitation35%

Record high67° (2022)

Record low23° (2017)

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)

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.