Monthly outlook for Stonington, CT: average high 56.5°, average low 40.4°. That is 1.1° below the climate normal for October. Precipitation is expected on 2 days (about 0.1 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 20 October (65°), the coolest 24 October (34.1°).
56.5°/40.4°
Average high / low
−1.1°
Below normal
2 / 4
Wet days / normal
0.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
20 October – 29 October
58.5°
59.3°
-0.5°
30 October – 8 November
53.1°
56.3°
-1.7°
9 November – 18 November
at normal
51.9°
—
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 (8 mi).
Wed, 2159° / 38°0
59 °
Stonington, Wednesday, 21 October
Partly cloudy. High 59°, low 38°.
Pressure30.15 inHg
Wind14.4 mph NE
Humidity61%
Visibility6.2 mi
Dew point40°
Thu, 2264° / 40°0
64 °
Stonington, Thursday, 22 October
Clear. High 64°, low 40°.
Pressure29.88 inHg
Wind10 mph N
Humidity36%
Visibility6.2 mi
Dew point33°
Fri, 2352° / 39°0
52 °
Stonington, Friday, 23 October
Clear. High 52°, low 39°.
Pressure30.27 inHg
Wind10.9 mph N
Humidity49%
Visibility6.2 mi
Dew point26°
Sat, 2456° / 34°0
56 °
Stonington, Saturday, 24 October
Clear. High 56°, low 34°.
Pressure30.53 inHg
Wind7.2 mph N
Humidity48%
Visibility—
Dew point29°
Sun, 2559° / 35°0
59 °
Stonington, Sunday, 25 October
Clear. High 59°, low 35°.
Pressure30.50 inHg
Wind6.5 mph SW
Humidity51%
Visibility—
Dew point35°
Mon, 2663° / 47°0
63 °
Stonington, Monday, 26 October
Partly cloudy. High 63°, low 47°.
Pressure30.30 inHg
Wind11.4 mph W
Humidity62%
Visibility—
Dew point45°
Tue, 2763° / 55°0
63 °
Stonington, Tuesday, 27 October
Overcast. High 63°, low 55°.
Pressure30.09 inHg
Wind12.2 mph SW
Humidity67%
Visibility—
Dew point50°
Wed, 2855° / 38°0.07
55 °
Stonington, Wednesday, 28 October
Light rain. High 55°, low 38°.
Pressure30.15 inHg
Wind19.8 mph NW
Humidity44%
Visibility—
Dew point24°
Thu, 2950° / 35°0
50 °
Stonington, Thursday, 29 October
Mostly clear. High 50°, low 35°.
Pressure30.30 inHg
Wind11.5 mph SW
Humidity52%
Visibility—
Dew point28°
Fri, 3058° / 44°0.04
58 °
Stonington, Friday, 30 October
Light rain. High 58°, low 44°.
Pressure30.03 inHg
Wind17.4 mph SW
Humidity57%
Visibility—
Dew point41°
Sat, 3146° / 36°0
46 °
Stonington, Saturday, 31 October
Clear. High 46°, low 36°.
Pressure30.09 inHg
Wind18.1 mph NW
Humidity48%
Visibility—
Dew point23°
Sun, 0155° / 43°0
55 °
Stonington, Sunday, 1 November
Overcast. High 55°, low 43°.
Pressure30.12 inHg
Wind18 mph SW
Humidity53%
Visibility—
Dew point34°
Mon, 0256° / 41°0
56 °
Stonington, Monday, 2 November
Clear. High 56°, low 41°.
Pressure30.24 inHg
Wind12.6 mph W
Humidity52%
Visibility—
Dew point35°
Tue, 0351° / 38°0
51 °
Stonington, Tuesday, 3 November
Clear. High 51°, low 38°.
Pressure30.62 inHg
Wind7 mph N
Humidity47%
Visibility—
Dew point27°
Wed, 0453° / 44°0
53 °
Stonington, Wednesday, 4 November
Overcast. High 53°, low 44°.
Pressure30.59 inHg
Wind12.5 mph E
Humidity61%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 0556° / 45°0.15
56 °
Stonington, 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 °
Stonington, 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 °
Stonington, 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 °
Stonington, 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)
Mon, 0954° / 42°0.09
54 °
Stonington, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.09 in
Chance of precipitation20%
Record high71° (1975)
Record low26° (2019)
Tue, 1055° / 42°0.18
55 °
Stonington, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.18 in
Chance of precipitation38%
Record high67° (1999)
Record low27° (2017)
Wed, 1153° / 42°0.15
53 °
Stonington, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.15 in
Chance of precipitation35%
Record high67° (2022)
Record low24° (2017)
Thu, 1252° / 41°0.16
52 °
Stonington, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.16 in
Chance of precipitation37%
Record high71° (2022)
Record low28° (2019)
Fri, 1351° / 39°0.22
51 °
Stonington, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.22 in
Chance of precipitation40%
Record high67° (1964)
Record low21° (2019)
Sat, 1451° / 39°0.09
51 °
Stonington, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.09 in
Chance of precipitation22%
Record high64° (2008)
Record low24° (1986)
Sun, 1552° / 39°0.13
52 °
Stonington, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.13 in
Chance of precipitation35%
Record high70° (1993)
Record low24° (1967)
Mon, 1651° / 39°0.15
51 °
Stonington, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.15 in
Chance of precipitation37%
Record high66° (2001)
Record low21° (1967)
Tue, 1751° / 38°0.16
51 °
Stonington, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.16 in
Chance of precipitation27%
Record high65° (2024)
Record low25° (1967)
Wed, 1851° / 39°0.08
51 °
Stonington, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.08 in
Chance of precipitation23%
Record high64° (1987)
Record low27° (2020)
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 Stonington, 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 Stonington, 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.