As of 05:44 EDT

Weather in Deep River, CT

58°Current weather

Deep River, Thursday, 8 October, 05:44

Mostly clear. Feels like 58°. High 73°, low 49°.

Pressure29.80 inHg
Wind6.9 mph N
Humidity91%
Visibility6.2 mi
Dew point56°

Monthly outlook for Deep River, CT: average high 62.2°, average low 48.1°. That is 0.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 13 October (73.1°), the coolest 18 October (38.4°).

62.2°/48.1°
Average high / low
+0.5°
Above normal
3 / 4
Wet days / normal
0.6 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
8 October – 17 October64.9°62.3°+1.4°
18 October – 27 October57.5°59°-0.8°
28 October – 6 Novemberat normal56.4°—

October records over 66 years

80.6°2 October 2019All-time high
29.1°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Old Lyme (9 mi).

Fri, 0969° / 43°0Clear
69 °Clear

Deep River, Friday, 9 October

Clear. High 69°, low 43°.

Pressure30.09 inHg
Wind11 mph W
Humidity46%
Visibility6.2 mi
Dew point44°
Sat, 1063° / 47°0Overcast
63 °Overcast

Deep River, Saturday, 10 October

Overcast. High 63°, low 47°.

Pressure30.47 inHg
Wind5.6 mph NW
Humidity49%
Visibility6.2 mi
Dew point42°
Sun, 1165° / 46°0.05Light rain
65 °Light rain

Deep River, Sunday, 11 October

Light rain. High 65°, low 46°.

Pressure30.42 inHg
Wind7.3 mph S
Humidity59%
Visibility2.3 mi
Dew point49°
Mon, 1264° / 56°0.48Rain
64 °Rain

Deep River, Monday, 12 October

Rain. High 64°, low 56°.

Pressure29.85 inHg
Wind8.4 mph E
Humidity98%
Visibility—
Dew point60°
Tue, 1373° / 54°0.08Light rain
73 °Light rain

Deep River, Tuesday, 13 October

Light rain. High 73°, low 54°.

Pressure29.74 inHg
Wind15 mph NW
Humidity77%
Visibility—
Dew point60°
Wed, 1456° / 44°0Clear
56 °Clear

Deep River, Wednesday, 14 October

Clear. High 56°, low 44°.

Pressure29.88 inHg
Wind19.1 mph NW
Humidity49%
Visibility—
Dew point32°
Thu, 1556° / 40°0Overcast
56 °Overcast

Deep River, Thursday, 15 October

Overcast. High 56°, low 40°.

Pressure30.33 inHg
Wind8.1 mph SW
Humidity54%
Visibility—
Dew point34°
Fri, 1667° / 55°0Overcast
67 °Overcast

Deep River, Friday, 16 October

Overcast. High 67°, low 55°.

Pressure30.18 inHg
Wind15.7 mph SW
Humidity70%
Visibility—
Dew point53°
Sat, 1764° / 45°0Partly cloudy
64 °Partly cloudy

Deep River, Saturday, 17 October

Partly cloudy. High 64°, low 45°.

Pressure30.09 inHg
Wind17.3 mph NW
Humidity56%
Visibility—
Dew point47°
Sun, 1852° / 38°0Overcast
52 °Overcast

Deep River, Sunday, 18 October

Overcast. High 52°, low 38°.

Pressure30.50 inHg
Wind9.1 mph N
Humidity49%
Visibility—
Dew point29°
Mon, 1962° / 54°0Overcast
62 °Overcast

Deep River, Monday, 19 October

Overcast. High 62°, low 54°.

Pressure30.24 inHg
Wind11.4 mph SW
Humidity78%
Visibility—
Dew point52°
Tue, 2053° / 50°0.03Light rain
53 °Light rain

Deep River, Tuesday, 20 October

Light rain. High 53°, low 50°.

Pressure30.15 inHg
Wind5.9 mph W
Humidity80%
Visibility—
Dew point47°
Wed, 2156° / 48°0Overcast
56 °Overcast

Deep River, Wednesday, 21 October

Overcast. High 56°, low 48°.

Pressure30.03 inHg
Wind4.5 mph NE
Humidity74%
Visibility—
Dew point44°
Thu, 2260° / 46°0Clear
60 °Clear

Deep River, Thursday, 22 October

Clear. High 60°, low 46°.

Pressure30.06 inHg
Wind6.4 mph SE
Humidity59%
Visibility—
Dew point42°
Fri, 2362° / 51°0Clear
62 °Clear

Deep River, Friday, 23 October

Clear. High 62°, low 51°.

Pressure30.30 inHg
Wind9.7 mph SE
Humidity61%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2459° / 49°0.13Climate normal
59 °Climate normal

Deep River, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high59°
Average low49°
Average precipitation0.13 in
Chance of precipitation33%
Record high72° (2024)
Record low32° (1969)
Sun, 2559° / 49°0.14Climate normal
59 °Climate normal

Deep River, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high59°
Average low49°
Average precipitation0.14 in
Chance of precipitation32%
Record high71° (2021)
Record low39° (1962)
Mon, 2658° / 48°0.15Climate normal
58 °Climate normal

Deep River, Monday, 26 October

Climate normal for this date — 60-year average.

Average high58°
Average low48°
Average precipitation0.15 in
Chance of precipitation32%
Record high70° (1971)
Record low35° (2018)
Tue, 2758° / 47°0.15Climate normal
58 °Climate normal

Deep River, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high58°
Average low47°
Average precipitation0.15 in
Chance of precipitation23%
Record high71° (1963)
Record low32° (1976)
Wed, 2858° / 47°0.17Climate normal
58 °Climate normal

Deep River, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high58°
Average low47°
Average precipitation0.17 in
Chance of precipitation33%
Record high74° (2023)
Record low32° (1976)
Thu, 2956° / 46°0.17Climate normal
56 °Climate normal

Deep River, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high56°
Average low46°
Average precipitation0.17 in
Chance of precipitation25%
Record high71° (1984)
Record low33° (1965)
Fri, 3056° / 45°0.15Climate normal
56 °Climate normal

Deep River, Friday, 30 October

Climate normal for this date — 60-year average.

Average high56°
Average low45°
Average precipitation0.15 in
Chance of precipitation23%
Record high66° (1971)
Record low35° (2020)
Sat, 3156° / 46°0.07Climate normal
56 °Climate normal

Deep River, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high56°
Average low46°
Average precipitation0.07 in
Chance of precipitation23%
Record high72° (2024)
Record low29° (2020)
Sun, 0158° / 47°0.12Climate normal
58 °Climate normal

Deep River, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high58°
Average low47°
Average precipitation0.12 in
Chance of precipitation28%
Record high74° (2024)
Record low37° (2010)
Mon, 0257° / 47°0.08Climate normal
57 °Climate normal

Deep River, Monday, 2 November

Climate normal for this date — 60-year average.

Average high57°
Average low47°
Average precipitation0.08 in
Chance of precipitation30%
Record high69° (2022)
Record low31° (1965)
Tue, 0357° / 46°0.16Climate normal
57 °Climate normal

Deep River, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high57°
Average low46°
Average precipitation0.16 in
Chance of precipitation30%
Record high69° (2017)
Record low35° (1980)
Wed, 0456° / 46°0.04Climate normal
56 °Climate normal

Deep River, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high56°
Average low46°
Average precipitation0.04 in
Chance of precipitation27%
Record high68° (1975)
Record low34° (2013)
Thu, 0556° / 46°0.15Climate normal
56 °Climate normal

Deep River, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high56°
Average low46°
Average precipitation0.15 in
Chance of precipitation40%
Record high70° (2022)
Record low34° (1965)
Fri, 0655° / 45°0.11Climate normal
55 °Climate normal

Deep River, Friday, 6 November

Climate normal for this date — 60-year average.

Average high55°
Average low45°
Average precipitation0.11 in
Chance of precipitation35%
Record high71° (2024)
Record low33° (2012)

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 Deep River, 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 Deep River, 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.