Monthly outlook for Stony Brook, NY: average high 59.2°, average low 49.8°. That is 1.3° above the climate normal for October. Precipitation is expected on 4 days (about 4.1 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (65.1°), the coolest 24 October (34.5°).
59.2°/49.8°
Average high / low
+1.3°
Above normal
4 / 5
Wet days / normal
4.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
61°
57.8°
+1.7°
3 November – 12 November
56.4°
54.6°
+1°
13 November – 22 November
at normal
50.1°
—
October records over 66 years
89.4°2 October 2019All-time high
32.7°27 October 1976All-time low
Climate normals and records are computed from the nearest reference point — Stony Brook University (0 mi).
Sun, 2565° / 38°0
65 °
Stony Brook, Sunday, 25 October
Clear. High 65°, low 38°.
Pressure30.56 inHg
Wind1.3 mph SW
Humidity61%
Visibility6.2 mi
Dew point41°
Mon, 2662° / 43°0
62 °
Stony Brook, Monday, 26 October
Clear. High 62°, low 43°.
Pressure30.24 inHg
Wind9.2 mph W
Humidity66%
Visibility6.2 mi
Dew point46°
Tue, 2760° / 50°0
60 °
Stony Brook, Tuesday, 27 October
Mostly clear. High 60°, low 50°.
Pressure30.36 inHg
Wind11.5 mph NE
Humidity56%
Visibility6.2 mi
Dew point36°
Wed, 2854° / 46°0
54 °
Stony Brook, Wednesday, 28 October
Mostly clear. High 54°, low 46°.
Pressure30.50 inHg
Wind8.7 mph NE
Humidity72%
Visibility6.2 mi
Dew point41°
Thu, 2963° / 53°0
63 °
Stony Brook, Thursday, 29 October
Clear. High 63°, low 53°.
Pressure30.30 inHg
Wind14.9 mph SW
Humidity76%
Visibility—
Dew point50°
Fri, 3065° / 57°0
65 °
Stony Brook, Friday, 30 October
Clear. High 65°, low 57°.
Pressure30.18 inHg
Wind12.4 mph W
Humidity70%
Visibility—
Dew point51°
Sat, 3160° / 54°0
60 °
Stony Brook, Saturday, 31 October
Partly cloudy. High 60°, low 54°.
Pressure30.36 inHg
Wind12 mph E
Humidity68%
Visibility—
Dew point46°
Sun, 0157° / 54°0.02
57 °
Stony Brook, Sunday, 1 November
Light rain. High 57°, low 54°.
Pressure30.36 inHg
Wind10.8 mph E
Humidity73%
Visibility—
Dew point48°
Mon, 0264° / 58°2.74
64 °
Stony Brook, Monday, 2 November
Heavy rain. High 64°, low 58°.
Pressure29.83 inHg
Wind17.9 mph E
Humidity97%
Visibility—
Dew point61°
Tue, 0363° / 57°1.07
63 °
Stony Brook, Tuesday, 3 November
Heavy rain. High 63°, low 57°.
Pressure29.53 inHg
Wind13.2 mph S
Humidity94%
Visibility—
Dew point59°
Wed, 0462° / 55°0.17
62 °
Stony Brook, Wednesday, 4 November
Rain. High 62°, low 55°.
Pressure29.71 inHg
Wind15.7 mph E
Humidity81%
Visibility—
Dew point51°
Thu, 0557° / 51°0.05
57 °
Stony Brook, Thursday, 5 November
Light rain. High 57°, low 51°.
Pressure29.85 inHg
Wind16.3 mph W
Humidity69%
Visibility—
Dew point43°
Fri, 0655° / 51°0.01
55 °
Stony Brook, Friday, 6 November
Light rain. High 55°, low 51°.
Pressure30.09 inHg
Wind14.2 mph E
Humidity69%
Visibility—
Dew point44°
Sat, 0750° / 48°0
50 °
Stony Brook, Saturday, 7 November
Overcast. High 50°, low 48°.
Pressure30.36 inHg
Wind17.4 mph E
Humidity73%
Visibility—
Dew point41°
Sun, 0851° / 47°0.02
51 °
Stony Brook, Sunday, 8 November
Light rain. High 51°, low 47°.
Pressure30.06 inHg
Wind19.5 mph N
Humidity85%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0954° / 44°0.1
54 °
Stony Brook, Monday, 9 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.1 in
Chance of precipitation25%
Record high72° (2020)
Record low28° (2019)
Tue, 1055° / 44°0.17
55 °
Stony Brook, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.17 in
Chance of precipitation42%
Record high69° (2020)
Record low28° (2017)
Wed, 1153° / 44°0.15
53 °
Stony Brook, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high53°
Average low44°
Average precipitation0.15 in
Chance of precipitation37%
Record high69° (2024)
Record low26° (2017)
Thu, 1252° / 42°0.16
52 °
Stony Brook, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.16 in
Chance of precipitation38%
Record high69° (2022)
Record low30° (2019)
Fri, 1351° / 41°0.22
51 °
Stony Brook, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.22 in
Chance of precipitation40%
Record high66° (1964)
Record low24° (2019)
Sat, 1451° / 41°0.11
51 °
Stony Brook, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.11 in
Chance of precipitation22%
Record high64° (1989)
Record low26° (2019)
Sun, 1552° / 41°0.12
52 °
Stony Brook, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.12 in
Chance of precipitation42%
Record high71° (1993)
Record low25° (1967)
Mon, 1651° / 41°0.14
51 °
Stony Brook, Monday, 16 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.14 in
Chance of precipitation38%
Record high65° (2006)
Record low24° (1967)
Tue, 1750° / 40°0.15
50 °
Stony Brook, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.15 in
Chance of precipitation33%
Record high65° (2006)
Record low31° (1967)
Wed, 1850° / 41°0.08
50 °
Stony Brook, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.08 in
Chance of precipitation27%
Record high63° (2024)
Record low29° (2014)
Thu, 1950° / 40°0.07
50 °
Stony Brook, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.07 in
Chance of precipitation25%
Record high61° (2021)
Record low25° (2014)
Fri, 2050° / 40°0.13
50 °
Stony Brook, Friday, 20 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.13 in
Chance of precipitation28%
Record high66° (1985)
Record low28° (1986)
Sat, 2149° / 39°0.11
49 °
Stony Brook, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high49°
Average low39°
Average precipitation0.11 in
Chance of precipitation33%
Record high61° (1991)
Record low21° (1987)
Sun, 2248° / 39°0.16
48 °
Stony Brook, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.16 in
Chance of precipitation40%
Record high61° (2007)
Record low20° (2018)
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 Stony Brook, NY 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 Stony Brook, NY 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.