Monthly outlook for Darien, CT: average high 60.2°, average low 46.4°. That is 0.7° below the climate normal for October. Precipitation is expected on 5 days (about 1.8 inches), against a normal of 4 days and 2.0 inches. The warmest day looks like 14 October (76.7°), the coolest 20 October (36.7°).
60.2°/46.4°
Average high / low
−0.7°
Below normal
5 / 4
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
64.2°
62.4°
+1°
20 October – 29 October
53.5°
59.3°
-3.2°
30 October – 8 November
at normal
56.1°
—
October records over 66 years
89.2°2 October 2019All-time high
28.8°31 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Stamford (4 mi).
Sun, 1160° / 48°0.54
60 °
Darien, Sunday, 11 October
Rain. High 60°, low 48°.
Pressure30.30 inHg
Wind10 mph E
Humidity88%
Visibility3.6 mi
Dew point53°
Mon, 1271° / 51°0.17
71 °
Darien, Monday, 12 October
Rain. High 71°, low 51°.
Pressure29.74 inHg
Wind10.3 mph N
Humidity75%
Visibility6.2 mi
Dew point57°
Tue, 1371° / 53°0
71 °
Darien, Tuesday, 13 October
Clear. High 71°, low 53°.
Pressure29.91 inHg
Wind6 mph S
Humidity75%
Visibility6.2 mi
Dew point59°
Wed, 1477° / 63°0
77 °
Darien, Wednesday, 14 October
Partly cloudy. High 77°, low 63°.
Pressure29.83 inHg
Wind10 mph NW
Humidity65%
Visibility6.2 mi
Dew point63°
Thu, 1562° / 47°0
62 °
Darien, Thursday, 15 October
Mostly clear. High 62°, low 47°.
Pressure30.15 inHg
Wind13.2 mph N
Humidity58%
Visibility—
Dew point46°
Fri, 1665° / 45°0.87
65 °
Darien, Friday, 16 October
Rain. High 65°, low 45°.
Pressure30.06 inHg
Wind11.6 mph SW
Humidity83%
Visibility—
Dew point47°
Sat, 1765° / 50°0.09
65 °
Darien, Saturday, 17 October
Light rain. High 65°, low 50°.
Pressure29.88 inHg
Wind13.7 mph NW
Humidity83%
Visibility—
Dew point56°
Sun, 1854° / 42°0.11
54 °
Darien, Sunday, 18 October
Light rain. High 54°, low 42°.
Pressure29.97 inHg
Wind17.3 mph N
Humidity85%
Visibility—
Dew point45°
Mon, 1949° / 39°0
49 °
Darien, Monday, 19 October
Clear. High 49°, low 39°.
Pressure30.47 inHg
Wind15.5 mph N
Humidity54%
Visibility—
Dew point29°
Tue, 2050° / 37°0
50 °
Darien, Tuesday, 20 October
Mostly clear. High 50°, low 37°.
Pressure30.56 inHg
Wind9.5 mph N
Humidity40%
Visibility—
Dew point21°
Wed, 2151° / 41°0
51 °
Darien, Wednesday, 21 October
Overcast. High 51°, low 41°.
Pressure30.53 inHg
Wind5.6 mph N
Humidity41%
Visibility—
Dew point25°
Thu, 2253° / 46°0
53 °
Darien, Thursday, 22 October
Clear. High 53°, low 46°.
Pressure30.62 inHg
Wind7.9 mph E
Humidity60%
Visibility—
Dew point38°
Fri, 2353° / 44°0
53 °
Darien, Friday, 23 October
Clear. High 53°, low 44°.
Pressure30.47 inHg
Wind8.3 mph NE
Humidity54%
Visibility—
Dew point34°
Sat, 2458° / 45°0
58 °
Darien, Saturday, 24 October
Overcast. High 58°, low 45°.
Pressure30.33 inHg
Wind7.9 mph NE
Humidity54%
Visibility—
Dew point35°
Sun, 2556° / 47°0
56 °
Darien, Sunday, 25 October
Overcast. High 56°, low 47°.
Pressure30.27 inHg
Wind12.9 mph E
Humidity57%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2658° / 47°0.14
58 °
Darien, Monday, 26 October
Climate normal for this date — 60-year average.
Average high58°
Average low47°
Average precipitation0.14 in
Chance of precipitation32%
Record high76° (1963)
Record low34° (2018)
Tue, 2758° / 47°0.16
58 °
Darien, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high58°
Average low47°
Average precipitation0.16 in
Chance of precipitation25%
Record high79° (1963)
Record low31° (1976)
Wed, 2858° / 46°0.17
58 °
Darien, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.17 in
Chance of precipitation28%
Record high79° (2023)
Record low31° (1976)
Thu, 2956° / 44°0.22
56 °
Darien, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.22 in
Chance of precipitation22%
Record high72° (1984)
Record low32° (1965)
Fri, 3056° / 44°0.13
56 °
Darien, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.13 in
Chance of precipitation22%
Record high75° (2024)
Record low33° (2020)
Sat, 3157° / 45°0.06
57 °
Darien, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high57°
Average low45°
Average precipitation0.06 in
Chance of precipitation23%
Record high81° (2024)
Record low29° (2020)
Sun, 0158° / 46°0.11
58 °
Darien, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.11 in
Chance of precipitation28%
Record high79° (2024)
Record low36° (1976)
Mon, 0258° / 46°0.08
58 °
Darien, Monday, 2 November
Climate normal for this date — 60-year average.
Average high58°
Average low46°
Average precipitation0.08 in
Chance of precipitation32%
Record high72° (1982)
Record low29° (2023)
Tue, 0358° / 45°0.1
58 °
Darien, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high58°
Average low45°
Average precipitation0.1 in
Chance of precipitation25%
Record high74° (2003)
Record low34° (2023)
Wed, 0456° / 44°0.05
56 °
Darien, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.05 in
Chance of precipitation22%
Record high71° (1975)
Record low34° (2013)
Thu, 0556° / 44°0.13
56 °
Darien, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.13 in
Chance of precipitation33%
Record high72° (2024)
Record low34° (1965)
Fri, 0655° / 44°0.09
55 °
Darien, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.09 in
Chance of precipitation30%
Record high79° (2024)
Record low33° (2012)
Sat, 0755° / 43°0.09
55 °
Darien, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.09 in
Chance of precipitation27%
Record high74° (2022)
Record low32° (1962)
Sun, 0853° / 42°0.15
53 °
Darien, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.15 in
Chance of precipitation32%
Record high71° (2020)
Record low29° (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 Darien, 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 Darien, 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.