As of 14:21 EDT

Weather in Old Lyme, CT

56°

Old Lyme, Wednesday, 28 October, 14:21

Overcast. Feels like 55°. High 56°, low 35°.

Pressure30.42 inHg

Wind3.9 mph S

Humidity66%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

Monthly outlook for Old Lyme, CT: average high 57.3°, average low 44.3°. That is 1.2° above the climate normal for October. Precipitation is expected on 2 days (about 1.8 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (68.8°), the coolest 28 October (35.2°).

57.3°/44.3°

Average high / low

+1.2°

Above normal

2 / 5

Wet days / normal

1.8 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
28 October – 6 November	61.2°	56.4°	+2.7°
7 November – 16 November	50.9°	52.2°	-0.7°
17 November – 26 November	at normal	48.9°	—

October records over 66 years

80.6°2 October 2019All-time high

29.1°31 October 2020All-time low

Thu, 2967° / 44°

67 °

Old Lyme, Thursday, 29 October

Clear. High 67°, low 44°.

Pressure30.24 inHg

Wind9.1 mph SW

Humidity61%

Visibility6.2 mi

Dew point49°

Fri, 3069° / 47°

69 °

Old Lyme, Friday, 30 October

Clear. High 69°, low 47°.

Pressure30.03 inHg

Wind9.5 mph NW

Humidity58%

Visibility6.2 mi

Dew point52°

Sat, 3155° / 40°

55 °

Old Lyme, Saturday, 31 October

Clear. High 55°, low 40°.

Pressure30.39 inHg

Wind8.9 mph NW

Humidity47%

Visibility6.2 mi

Dew point33°

Sun, 0158° / 37°

58 °

Old Lyme, Sunday, 1 November

Clear. High 58°, low 37°.

Pressure30.42 inHg

Wind4.5 mph W

Humidity47%

Visibility6.2 mi

Dew point35°

Mon, 0266° / 41°

66 °

Old Lyme, Monday, 2 November

Clear. High 66°, low 41°.

Pressure30.33 inHg

Wind4.7 mph W

Humidity59%

Visibility—

Dew point43°

Tue, 0362° / 49°

62 °

Old Lyme, Tuesday, 3 November

Overcast. High 62°, low 49°.

Pressure30.24 inHg

Wind18.8 mph NE

Humidity66%

Visibility—

Dew point46°

Wed, 0454° / 45°

54 °

Old Lyme, Wednesday, 4 November

Overcast. High 54°, low 45°.

Pressure30.42 inHg

Wind18 mph E

Humidity58%

Visibility—

Dew point36°

Thu, 0562° / 53°

0.02

62 °

Old Lyme, Thursday, 5 November

Light rain. High 62°, low 53°.

Pressure30.15 inHg

Wind21.2 mph SE

Humidity91%

Visibility—

Dew point56°

Fri, 0663° / 57°

0.81

63 °

Old Lyme, Friday, 6 November

Heavy rain. High 63°, low 57°.

Pressure29.47 inHg

Wind27.5 mph SE

Humidity79%

Visibility—

Dew point55°

Sat, 0750° / 43°

50 °

Old Lyme, Saturday, 7 November

Clear. High 50°, low 43°.

Pressure30.03 inHg

Wind20.9 mph NW

Humidity53%

Visibility—

Dew point31°

Sun, 0848° / 41°

48 °

Old Lyme, Sunday, 8 November

Overcast. High 48°, low 41°.

Pressure30.33 inHg

Wind11.3 mph N

Humidity48%

Visibility—

Dew point26°

Mon, 0949° / 37°

49 °

Old Lyme, Monday, 9 November

Clear. High 49°, low 37°.

Pressure30.42 inHg

Wind8.3 mph N

Humidity44%

Visibility—

Dew point23°

Tue, 1048° / 39°

48 °

Old Lyme, Tuesday, 10 November

Clear. High 48°, low 39°.

Pressure30.36 inHg

Wind7.5 mph SW

Humidity50%

Visibility—

Dew point27°

Wed, 1155° / 48°

55 °

Old Lyme, Wednesday, 11 November

Overcast. High 55°, low 48°.

Pressure30.21 inHg

Wind15.3 mph E

Humidity66%

Visibility—

Dew point42°

Thu, 1256° / 51°

56 °

Old Lyme, Thursday, 12 November

Rain. High 56°, low 51°.

Pressure29.97 inHg

Wind36.1 mph NE

Humidity88%

Visibility—

Dew point49°

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

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)

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)

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.