As of 01:04 EDT

Weather in Old Lyme, CT

52°

Old Lyme, Thursday, 29 October, 01:04

Clear. Feels like 51°. High 67°, low 46°.

Pressure30.33 inHg

Wind3.4 mph S

Humidity91%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Monthly outlook for Old Lyme, CT: average high 59.4°, average low 50°. That is 2.6° above the climate normal for October. Precipitation is expected on 6 days (about 3.0 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 30 October (68.5°), the coolest 1 November (36.4°).

59.4°/50°

Average high / low

+2.6°

Above normal

6 / 5

Wet days / normal

3.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
29 October – 7 November	61.5°	56°	+3°
8 November – 17 November	55.8°	51.8°	+2.2°
18 November – 27 November	at normal	48.8°	—

October records over 66 years

80.6°2 October 2019All-time high

29.1°31 October 2020All-time low

Fri, 3069° / 48°

69 °

Old Lyme, Friday, 30 October

Clear. High 69°, low 48°.

Pressure30.03 inHg

Wind9.8 mph NW

Humidity56%

Visibility6.2 mi

Dew point50°

Sat, 3154° / 39°

54 °

Old Lyme, Saturday, 31 October

Partly cloudy. High 54°, low 39°.

Pressure30.39 inHg

Wind8.1 mph N

Humidity48%

Visibility6.2 mi

Dew point33°

Sun, 0158° / 36°

58 °

Old Lyme, Sunday, 1 November

Clear. High 58°, low 36°.

Pressure30.47 inHg

Wind3.8 mph NW

Humidity44%

Visibility6.2 mi

Dew point32°

Mon, 0264° / 45°

64 °

Old Lyme, Monday, 2 November

Partly cloudy. High 64°, low 45°.

Pressure30.33 inHg

Wind10.9 mph SW

Humidity59%

Visibility—

Dew point43°

Tue, 0365° / 50°

65 °

Old Lyme, Tuesday, 3 November

Light rain. High 65°, low 50°.

Pressure30.21 inHg

Wind14.1 mph E

Humidity59%

Visibility—

Dew point46°

Wed, 0455° / 51°

0.04

55 °

Old Lyme, Wednesday, 4 November

Light rain. High 55°, low 51°.

Pressure30.42 inHg

Wind14.4 mph E

Humidity71%

Visibility—

Dew point44°

Thu, 0560° / 56°

0.02

60 °

Old Lyme, Thursday, 5 November

Light rain. High 60°, low 56°.

Pressure30.30 inHg

Wind16.6 mph SE

Humidity87%

Visibility—

Dew point55°

Fri, 0662° / 60°

0.79

62 °

Old Lyme, Friday, 6 November

Rain. High 62°, low 60°.

Pressure29.88 inHg

Wind24 mph SE

Humidity92%

Visibility—

Dew point59°

Sat, 0762° / 58°

0.03

62 °

Old Lyme, Saturday, 7 November

Light rain. High 62°, low 58°.

Pressure29.62 inHg

Wind8.2 mph NW

Humidity93%

Visibility—

Dew point58°

Sun, 0858° / 53°

0.53

58 °

Old Lyme, Sunday, 8 November

Rain. High 58°, low 53°.

Pressure29.71 inHg

Wind20 mph NW

Humidity88%

Visibility—

Dew point51°

Mon, 0958° / 53°

0.91

58 °

Old Lyme, Monday, 9 November

Rain. High 58°, low 53°.

Pressure29.50 inHg

Wind27.1 mph NE

Humidity87%

Visibility—

Dew point50°

Tue, 1056° / 53°

0.22

56 °

Old Lyme, Tuesday, 10 November

Rain. High 56°, low 53°.

Pressure29.56 inHg

Wind18.8 mph NW

Humidity87%

Visibility—

Dew point50°

Wed, 1154° / 51°

0.01

54 °

Old Lyme, Wednesday, 11 November

Light rain. High 54°, low 51°.

Pressure29.71 inHg

Wind20.4 mph SW

Humidity67%

Visibility—

Dew point43°

Thu, 1257° / 51°

0.03

57 °

Old Lyme, Thursday, 12 November

Light rain. High 57°, low 51°.

Pressure29.97 inHg

Wind18.9 mph SW

Humidity60%

Visibility—

Dew point41°

Fri, 1353° / 51°

0.38

53 °

Old Lyme, Friday, 13 November

Rain. High 53°, low 51°.

Pressure29.83 inHg

Wind16.1 mph W

Humidity71%

Visibility—

Dew point43°

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

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)

Thu, 2649° / 39°

0.2

49 °

Old Lyme, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high49°

Average low39°

Average precipitation0.2 in

Chance of precipitation43%

Record high62° (1979)

Record low25° (1978)

Fri, 2749° / 39°

0.13

49 °

Old Lyme, Friday, 27 November

Climate normal for this date — 60-year average.

Average high49°

Average low39°

Average precipitation0.13 in

Chance of precipitation35%

Record high61° (1986)

Record low23° (1978)

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.