Monthly outlook for Harbor View, CT: average high 59.4°, average low 45.1°. That is 0.6° below the climate normal for October. Precipitation is expected on 4 days (about 2.5 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 14 October (77.8°), the coolest 19 October (35.3°).
59.4°/45.1°
Average high / low
−0.6°
Below normal
4 / 5
Wet days / normal
2.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
11 October – 20 October
60.8°
61.2°
-0.2°
21 October – 30 October
57°
58.2°
-0.7°
31 October – 9 November
at normal
55.5°
—
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 (12 mi).
Mon, 1271° / 47°0.38
71 °
Harbor View, Monday, 12 October
Rain. High 71°, low 47°.
Pressure29.77 inHg
Wind11.5 mph N
Humidity70%
Visibility6.2 mi
Dew point55°
Tue, 1365° / 50°0.01
65 °
Harbor View, Tuesday, 13 October
Light rain. High 65°, low 50°.
Pressure30.00 inHg
Wind9.8 mph SE
Humidity75%
Visibility6.2 mi
Dew point56°
Wed, 1478° / 63°0.01
78 °
Harbor View, Wednesday, 14 October
Light rain. High 78°, low 63°.
Pressure29.83 inHg
Wind5.2 mph SW
Humidity74%
Visibility6.2 mi
Dew point67°
Thu, 1562° / 46°0
62 °
Harbor View, Thursday, 15 October
Partly cloudy. High 62°, low 46°.
Pressure30.15 inHg
Wind10.2 mph N
Humidity54%
Visibility6.2 mi
Dew point44°
Fri, 1663° / 44°1.43
63 °
Harbor View, Friday, 16 October
Heavy rain. High 63°, low 44°.
Pressure29.77 inHg
Wind22.9 mph NW
Humidity98%
Visibility—
Dew point56°
Sat, 1753° / 39°0.01
53 °
Harbor View, Saturday, 17 October
Light rain. High 53°, low 39°.
Pressure29.68 inHg
Wind21.9 mph NW
Humidity61%
Visibility—
Dew point39°
Sun, 1846° / 37°0
46 °
Harbor View, Sunday, 18 October
Overcast. High 46°, low 37°.
Pressure30.21 inHg
Wind21.9 mph NW
Humidity55%
Visibility—
Dew point27°
Mon, 1951° / 35°0
51 °
Harbor View, Monday, 19 October
Mostly clear. High 51°, low 35°.
Pressure30.59 inHg
Wind11.8 mph SW
Humidity41%
Visibility—
Dew point21°
Tue, 2061° / 48°0
61 °
Harbor View, Tuesday, 20 October
Clear. High 61°, low 48°.
Pressure30.36 inHg
Wind14.5 mph W
Humidity54%
Visibility—
Dew point38°
Wed, 2158° / 46°0
58 °
Harbor View, Wednesday, 21 October
Clear. High 58°, low 46°.
Pressure30.45 inHg
Wind9.7 mph E
Humidity60%
Visibility—
Dew point40°
Thu, 2255° / 44°0
55 °
Harbor View, Thursday, 22 October
Overcast. High 55°, low 44°.
Pressure30.47 inHg
Wind10.1 mph E
Humidity60%
Visibility—
Dew point37°
Fri, 2357° / 43°0
57 °
Harbor View, Friday, 23 October
Clear. High 57°, low 43°.
Pressure30.39 inHg
Wind12.7 mph NE
Humidity63%
Visibility—
Dew point39°
Sat, 2457° / 46°0
57 °
Harbor View, Saturday, 24 October
Overcast. High 57°, low 46°.
Pressure30.15 inHg
Wind13 mph NE
Humidity73%
Visibility—
Dew point43°
Sun, 2558° / 44°0
58 °
Harbor View, Sunday, 25 October
Clear. High 58°, low 44°.
Pressure29.97 inHg
Wind16.9 mph N
Humidity66%
Visibility—
Dew point41°
Mon, 2657° / 41°0.1
57 °
Harbor View, Monday, 26 October
Light rain. High 57°, low 41°.
Pressure29.97 inHg
Wind16.4 mph S
Humidity67%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2758° / 47°0.15
58 °
Harbor View, 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°0.17
58 °
Harbor View, 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°0.17
56 °
Harbor View, 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°0.15
56 °
Harbor View, 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°0.07
56 °
Harbor View, 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°0.12
58 °
Harbor View, 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°0.08
57 °
Harbor View, 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°0.16
57 °
Harbor View, 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°0.04
56 °
Harbor View, 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°0.15
56 °
Harbor View, 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°0.11
55 °
Harbor View, 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)
Sat, 0755° / 44°0.07
55 °
Harbor View, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.07 in
Chance of precipitation25%
Record high72° (2022)
Record low32° (1962)
Sun, 0853° / 43°0.13
53 °
Harbor View, 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 °
Harbor View, 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)
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 Harbor View, 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 Harbor View, 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.