As of 06:17 EST

Weather in Old Lyme, CT

48°

Old Lyme, Thursday, 12 November, 06:17

Overcast. Feels like 45°. High 57°, low 45°.

Pressure29.71 inHg

Wind7 mph NE

Humidity84%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

Monthly outlook for Old Lyme, CT: average high 52.5°, average low 42.1°. That is 1.7° above the climate normal for November. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 25 November (61.8°), the coolest 17 November (31.3°).

52.5°/42.1°

Average high / low

+1.7°

Above normal

4 / 5

Wet days / normal

1.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
12 November – 21 November	52.2°	50.2°	+1.1°
22 November – 1 December	53.1°	47.9°	+2.8°
2 December – 11 December	at normal	44.1°	—

November records over 66 years

74.3°1 November 2024All-time high

14.5°23 November 2018All-time low

Fri, 1346° / 37°

0.2

46 °

Old Lyme, Friday, 13 November

Light rain. High 46°, low 37°.

Pressure29.56 inHg

Wind10.2 mph N

Humidity92%

Visibility4.4 mi

Dew point37°

Sat, 1445° / 33°

45 °

Old Lyme, Saturday, 14 November

Overcast. High 45°, low 33°.

Pressure29.74 inHg

Wind9.4 mph NW

Humidity56%

Visibility6.2 mi

Dew point25°

Sun, 1547° / 36°

47 °

Old Lyme, Sunday, 15 November

Partly cloudy. High 47°, low 36°.

Pressure30.00 inHg

Wind12.9 mph NW

Humidity53%

Visibility6.2 mi

Dew point27°

Mon, 1649° / 33°

49 °

Old Lyme, Monday, 16 November

Partly cloudy. High 49°, low 33°.

Pressure30.36 inHg

Wind9.5 mph NW

Humidity60%

Visibility—

Dew point30°

Tue, 1754° / 31°

54 °

Old Lyme, Tuesday, 17 November

Mostly clear. High 54°, low 31°.

Pressure30.39 inHg

Wind8.5 mph NW

Humidity63%

Visibility—

Dew point33°

Wed, 1854° / 42°

54 °

Old Lyme, Wednesday, 18 November

Clear. High 54°, low 42°.

Pressure30.39 inHg

Wind11.1 mph W

Humidity64%

Visibility—

Dew point36°

Thu, 1956° / 45°

56 °

Old Lyme, Thursday, 19 November

Clear. High 56°, low 45°.

Pressure30.36 inHg

Wind8.2 mph SW

Humidity60%

Visibility—

Dew point37°

Fri, 2055° / 49°

55 °

Old Lyme, Friday, 20 November

Overcast. High 55°, low 49°.

Pressure30.30 inHg

Wind14 mph SW

Humidity63%

Visibility—

Dew point40°

Sat, 2158° / 50°

58 °

Old Lyme, Saturday, 21 November

Overcast. High 58°, low 50°.

Pressure30.12 inHg

Wind11.7 mph W

Humidity62%

Visibility—

Dew point41°

Sun, 2255° / 48°

55 °

Old Lyme, Sunday, 22 November

Clear. High 55°, low 48°.

Pressure30.18 inHg

Wind9.4 mph E

Humidity76%

Visibility—

Dew point45°

Mon, 2357° / 52°

57 °

Old Lyme, Monday, 23 November

Overcast. High 57°, low 52°.

Pressure29.97 inHg

Wind7.8 mph S

Humidity91%

Visibility—

Dew point52°

Tue, 2456° / 53°

56 °

Old Lyme, Tuesday, 24 November

Overcast. High 56°, low 53°.

Pressure29.97 inHg

Wind6.6 mph SW

Humidity87%

Visibility—

Dew point51°

Wed, 2562° / 48°

0.14

62 °

Old Lyme, Wednesday, 25 November

Light rain. High 62°, low 48°.

Pressure29.85 inHg

Wind19.2 mph NW

Humidity95%

Visibility—

Dew point55°

Thu, 2645° / 36°

0.48

45 °

Old Lyme, Thursday, 26 November

Rain. High 45°, low 36°.

Pressure30.03 inHg

Wind21.3 mph W

Humidity61%

Visibility—

Dew point29°

Fri, 2743° / 34°

43 °

Old Lyme, Friday, 27 November

Overcast. High 43°, low 34°.

Pressure30.50 inHg

Wind15.7 mph SW

Humidity50%

Visibility—

Dew point21°

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

Sat, 2849° / 39°

0.19

49 °

Old Lyme, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high49°

Average low39°

Average precipitation0.19 in

Chance of precipitation35%

Record high61° (1990)

Record low19° (2002)

Sun, 2948° / 38°

0.08

48 °

Old Lyme, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high48°

Average low38°

Average precipitation0.08 in

Chance of precipitation27%

Record high62° (2011)

Record low26° (1989)

Mon, 3046° / 37°

0.14

46 °

Old Lyme, Monday, 30 November

Climate normal for this date — 60-year average.

Average high46°

Average low37°

Average precipitation0.14 in

Chance of precipitation35%

Record high63° (2020)

Record low24° (2013)

Tue, 0146° / 36°

0.13

46 °

Old Lyme, Tuesday, 1 December

Climate normal for this date — 60-year average.

Average high46°

Average low36°

Average precipitation0.13 in

Chance of precipitation40%

Record high63° (2001)

Record low21° (1967)

Wed, 0246° / 36°

0.14

46 °

Old Lyme, Wednesday, 2 December

Climate normal for this date — 60-year average.

Average high46°

Average low36°

Average precipitation0.14 in

Chance of precipitation28%

Record high60° (2006)

Record low17° (1989)

Thu, 0346° / 35°

0.16

46 °

Old Lyme, Thursday, 3 December

Climate normal for this date — 60-year average.

Average high46°

Average low35°

Average precipitation0.16 in

Chance of precipitation28%

Record high60° (2009)

Record low15° (1976)

Fri, 0445° / 34°

0.11

45 °

Old Lyme, Friday, 4 December

Climate normal for this date — 60-year average.

Average high45°

Average low34°

Average precipitation0.11 in

Chance of precipitation27%

Record high63° (1998)

Record low14° (1989)

Sat, 0544° / 34°

0.17

44 °

Old Lyme, Saturday, 5 December

Climate normal for this date — 60-year average.

Average high44°

Average low34°

Average precipitation0.17 in

Chance of precipitation32%

Record high62° (2001)

Record low16° (2025)

Sun, 0645° / 35°

0.16

45 °

Old Lyme, Sunday, 6 December

Climate normal for this date — 60-year average.

Average high45°

Average low35°

Average precipitation0.16 in

Chance of precipitation47%

Record high62° (2001)

Record low22° (2007)

Mon, 0744° / 34°

0.15

44 °

Old Lyme, Monday, 7 December

Climate normal for this date — 60-year average.

Average high44°

Average low34°

Average precipitation0.15 in

Chance of precipitation32%

Record high66° (1998)

Record low15° (1964)

Tue, 0842° / 32°

0.1

42 °

Old Lyme, Tuesday, 8 December

Climate normal for this date — 60-year average.

Average high42°

Average low32°

Average precipitation0.1 in

Chance of precipitation30%

Record high56° (1974)

Record low17° (1964)

Wed, 0943° / 32°

0.19

43 °

Old Lyme, Wednesday, 9 December

Climate normal for this date — 60-year average.

Average high43°

Average low32°

Average precipitation0.19 in

Chance of precipitation38%

Record high58° (1991)

Record low13° (1968)

Thu, 1044° / 34°

0.13

44 °

Old Lyme, Thursday, 10 December

Climate normal for this date — 60-year average.

Average high44°

Average low34°

Average precipitation0.13 in

Chance of precipitation37%

Record high58° (2023)

Record low9° (1968)

Fri, 1143° / 33°

0.26

43 °

Old Lyme, Friday, 11 December

Climate normal for this date — 60-year average.

Average high43°

Average low33°

Average precipitation0.26 in

Chance of precipitation37%

Record high60° (2021)

Record low12° (1977)

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.