As of 08:17 EDT

Weather in Old Lyme, CT

45°

Old Lyme, Friday, 23 October, 08:17

Clear. Feels like 43°. High 59°, low 44°.

Pressure30.30 inHg

Wind3.4 mph W

Humidity71%

Visibility6.2 mi

Dew point36°

See detailed hourly forecast

Monthly outlook for Old Lyme, CT: average high 58.8°, average low 46.6°. That is 1.1° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 26 October (64.5°), the coolest 28 October (35.7°).

58.8°/46.6°

Average high / low

+1.1°

Above normal

2 / 5

Wet days / normal

0.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
23 October – 1 November	60°	57.6°	+1.3°
2 November – 11 November	56.9°	54.8°	+1.2°
12 November – 21 November	at normal	50.2°	—

October records over 66 years

80.6°2 October 2019All-time high

29.1°31 October 2020All-time low

Sat, 2461° / 38°

61 °

Old Lyme, Saturday, 24 October

Partly cloudy. High 61°, low 38°.

Pressure30.50 inHg

Wind3.9 mph NW

Humidity39%

Visibility6.2 mi

Dew point32°

Sun, 2562° / 36°

62 °

Old Lyme, Sunday, 25 October

Clear. High 62°, low 36°.

Pressure30.53 inHg

Wind2.3 mph S

Humidity44%

Visibility6.2 mi

Dew point39°

Mon, 2665° / 40°

65 °

Old Lyme, Monday, 26 October

Clear. High 65°, low 40°.

Pressure30.24 inHg

Wind4.5 mph W

Humidity44%

Visibility6.2 mi

Dew point40°

Tue, 2756° / 41°

56 °

Old Lyme, Tuesday, 27 October

Clear. High 56°, low 41°.

Pressure30.33 inHg

Wind8.6 mph N

Humidity46%

Visibility—

Dew point32°

Wed, 2854° / 36°

54 °

Old Lyme, Wednesday, 28 October

Clear. High 54°, low 36°.

Pressure30.47 inHg

Wind6.9 mph NE

Humidity49%

Visibility—

Dew point30°

Thu, 2957° / 51°

57 °

Old Lyme, Thursday, 29 October

Clear. High 57°, low 51°.

Pressure30.47 inHg

Wind9.2 mph S

Humidity65%

Visibility—

Dew point44°

Fri, 3061° / 55°

61 °

Old Lyme, Friday, 30 October

Overcast. High 61°, low 55°.

Pressure30.39 inHg

Wind12.5 mph SW

Humidity81%

Visibility—

Dew point53°

Sat, 3162° / 57°

62 °

Old Lyme, Saturday, 31 October

Overcast. High 62°, low 57°.

Pressure30.24 inHg

Wind10.1 mph SW

Humidity82%

Visibility—

Dew point55°

Sun, 0163° / 60°

0.11

63 °

Old Lyme, Sunday, 1 November

Light rain. High 63°, low 60°.

Pressure30.12 inHg

Wind20.5 mph S

Humidity92%

Visibility—

Dew point60°

Mon, 0264° / 59°

0.07

64 °

Old Lyme, Monday, 2 November

Light rain. High 64°, low 59°.

Pressure29.83 inHg

Wind19.2 mph SW

Humidity94%

Visibility—

Dew point60°

Tue, 0358° / 48°

58 °

Old Lyme, Tuesday, 3 November

Clear. High 58°, low 48°.

Pressure29.85 inHg

Wind16.9 mph NW

Humidity63%

Visibility—

Dew point42°

Wed, 0456° / 44°

56 °

Old Lyme, Wednesday, 4 November

Clear. High 56°, low 44°.

Pressure30.00 inHg

Wind15.1 mph W

Humidity59%

Visibility—

Dew point36°

Thu, 0551° / 42°

51 °

Old Lyme, Thursday, 5 November

Clear. High 51°, low 42°.

Pressure30.27 inHg

Wind16.4 mph NW

Humidity44%

Visibility—

Dew point25°

Fri, 0657° / 48°

57 °

Old Lyme, Friday, 6 November

Clear. High 57°, low 48°.

Pressure30.39 inHg

Wind16.3 mph SW

Humidity61%

Visibility—

Dew point40°

Sat, 0755° / 46°

0.01

55 °

Old Lyme, Saturday, 7 November

Light rain. High 55°, low 46°.

Pressure30.27 inHg

Wind24 mph NE

Humidity68%

Visibility—

Dew point43°

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

Sun, 0853° / 43°

0.13

53 °

Old Lyme, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high53°

Average low43°

Average precipitation0.13 in

Chance of precipitation32%

Record high71° (2020)

Record low30° (2019)

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)

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.