Monthly outlook for Harrisons, CT: average high 61.3°, average low 44.8°. That is 0.1° below the climate normal for October. Precipitation is expected on 7 days (about 1.6 inches), against a normal of 4 days and 2.1 inches. The warmest day looks like 14 October (76.9°), the coolest 20 October (33.4°).
61.3°/44.8°
Average high / low
−0.1°
Below normal
7 / 4
Wet days / normal
1.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
64.4°
62.3°
+1.2°
20 October – 29 October
56.2°
59.3°
-1.7°
30 October – 8 November
at normal
56.3°
—
October records over 66 years
82°8 October 2007All-time high
28.9°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Fishers Island (10 mi).
Sun, 1160° / 44°0.3
60 °
Harrisons, Sunday, 11 October
Rain. High 60°, low 44°.
Pressure30.36 inHg
Wind7.1 mph SE
Humidity54%
Visibility6.2 mi
Dew point43°
Mon, 1271° / 48°0.26
71 °
Harrisons, Monday, 12 October
Rain. High 71°, low 48°.
Pressure29.71 inHg
Wind13.4 mph NE
Humidity81%
Visibility6.2 mi
Dew point57°
Tue, 1369° / 54°0.05
69 °
Harrisons, Tuesday, 13 October
Light rain. High 69°, low 54°.
Pressure29.94 inHg
Wind6.4 mph SE
Humidity71%
Visibility6.2 mi
Dew point58°
Wed, 1477° / 61°0.16
77 °
Harrisons, Wednesday, 14 October
Light rain. High 77°, low 61°.
Pressure29.83 inHg
Wind8.8 mph NW
Humidity67%
Visibility6.2 mi
Dew point63°
Thu, 1563° / 47°0
63 °
Harrisons, Thursday, 15 October
Overcast. High 63°, low 47°.
Pressure30.12 inHg
Wind12.4 mph NW
Humidity57%
Visibility—
Dew point46°
Fri, 1666° / 45°0.72
66 °
Harrisons, Friday, 16 October
Rain. High 66°, low 45°.
Pressure30.09 inHg
Wind13.3 mph SW
Humidity100%
Visibility—
Dew point50°
Sat, 1766° / 53°0.05
66 °
Harrisons, Saturday, 17 October
Light rain. High 66°, low 53°.
Pressure29.85 inHg
Wind11.3 mph SW
Humidity94%
Visibility—
Dew point64°
Sun, 1858° / 47°0.09
58 °
Harrisons, Sunday, 18 October
Light rain. High 58°, low 47°.
Pressure29.94 inHg
Wind13.7 mph NW
Humidity68%
Visibility—
Dew point44°
Mon, 1951° / 38°0
51 °
Harrisons, Monday, 19 October
Clear. High 51°, low 38°.
Pressure30.42 inHg
Wind14.4 mph N
Humidity48%
Visibility—
Dew point28°
Tue, 2051° / 33°0
51 °
Harrisons, Tuesday, 20 October
Clear. High 51°, low 33°.
Pressure30.56 inHg
Wind10.4 mph N
Humidity32%
Visibility—
Dew point16°
Wed, 2154° / 40°0
54 °
Harrisons, Wednesday, 21 October
Overcast. High 54°, low 40°.
Pressure30.53 inHg
Wind5.7 mph N
Humidity40%
Visibility—
Dew point25°
Thu, 2256° / 40°0
56 °
Harrisons, Thursday, 22 October
Clear. High 56°, low 40°.
Pressure30.62 inHg
Wind6.8 mph NE
Humidity48%
Visibility—
Dew point31°
Fri, 2357° / 39°0
57 °
Harrisons, Friday, 23 October
Clear. High 57°, low 39°.
Pressure30.47 inHg
Wind7.8 mph NE
Humidity57%
Visibility—
Dew point35°
Sat, 2461° / 41°0
61 °
Harrisons, Saturday, 24 October
Clear. High 61°, low 41°.
Pressure30.30 inHg
Wind9.9 mph N
Humidity49%
Visibility—
Dew point34°
Sun, 2559° / 43°0
59 °
Harrisons, Sunday, 25 October
Overcast. High 59°, low 43°.
Pressure30.27 inHg
Wind10.1 mph NE
Humidity57%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2658° / 47°0.14
58 °
Harrisons, Monday, 26 October
Climate normal for this date — 60-year average.
Average high58°
Average low47°
Average precipitation0.14 in
Chance of precipitation28%
Record high74° (1963)
Record low34° (2018)
Tue, 2758° / 47°0.15
58 °
Harrisons, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high58°
Average low47°
Average precipitation0.15 in
Chance of precipitation25%
Record high75° (1963)
Record low31° (1976)
Wed, 2858° / 46°0.16
58 °
Harrisons, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.16 in
Chance of precipitation32%
Record high74° (2023)
Record low31° (1976)
Thu, 2957° / 45°0.17
57 °
Harrisons, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high57°
Average low45°
Average precipitation0.17 in
Chance of precipitation23%
Record high73° (1971)
Record low32° (1965)
Fri, 3056° / 44°0.17
56 °
Harrisons, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.17 in
Chance of precipitation25%
Record high69° (1971)
Record low33° (2020)
Sat, 3157° / 45°0.08
57 °
Harrisons, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high57°
Average low45°
Average precipitation0.08 in
Chance of precipitation23%
Record high72° (2024)
Record low29° (2020)
Sun, 0158° / 46°0.11
58 °
Harrisons, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.11 in
Chance of precipitation32%
Record high74° (2024)
Record low36° (1968)
Mon, 0258° / 46°0.09
58 °
Harrisons, Monday, 2 November
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.09 in
Chance of precipitation30%
Record high68° (2022)
Record low30° (1965)
Tue, 0358° / 45°0.17
58 °
Harrisons, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high58°
Average low45°
Average precipitation0.17 in
Chance of precipitation30%
Record high70° (1990)
Record low32° (2002)
Wed, 0456° / 45°0.04
56 °
Harrisons, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.04 in
Chance of precipitation23%
Record high70° (1975)
Record low33° (2013)
Thu, 0556° / 45°0.15
56 °
Harrisons, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.15 in
Chance of precipitation38%
Record high69° (2022)
Record low33° (1965)
Fri, 0655° / 44°0.13
55 °
Harrisons, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.13 in
Chance of precipitation35%
Record high71° (2024)
Record low32° (2012)
Sat, 0755° / 43°0.08
55 °
Harrisons, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.08 in
Chance of precipitation25%
Record high73° (2022)
Record low30° (1962)
Sun, 0854° / 42°0.12
54 °
Harrisons, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation30%
Record high71° (2020)
Record low30° (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 Harrisons, 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 Harrisons, 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.