Monthly outlook for Stony Brook, NY: average high 59°, average low 48.3°. That is 0.2° above the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 20 October (66.3°), the coolest 19 October (36.8°).
59°/48.3°
Average high / low
+0.2°
Above normal
4 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
19 October – 28 October
60.3°
59.5°
+0.5°
29 October – 7 November
56.7°
56.3°
+0.2°
8 November – 17 November
at normal
52.2°
—
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).
Tue, 2066° / 42°0
66 °
Stony Brook, Tuesday, 20 October
Clear. High 66°, low 42°.
Pressure30.24 inHg
Wind15.1 mph NE
Humidity63%
Visibility6.2 mi
Dew point47°
Wed, 2156° / 42°0
56 °
Stony Brook, Wednesday, 21 October
Partly cloudy. High 56°, low 42°.
Pressure30.27 inHg
Wind15.4 mph NE
Humidity72%
Visibility6.2 mi
Dew point43°
Thu, 2261° / 48°0
61 °
Stony Brook, Thursday, 22 October
Clear. High 61°, low 48°.
Pressure29.97 inHg
Wind10.8 mph NW
Humidity59%
Visibility6.2 mi
Dew point41°
Fri, 2352° / 45°0
52 °
Stony Brook, Friday, 23 October
Clear. High 52°, low 45°.
Pressure30.21 inHg
Wind18.7 mph NW
Humidity62%
Visibility—
Dew point34°
Sat, 2456° / 45°0
56 °
Stony Brook, Saturday, 24 October
Clear. High 56°, low 45°.
Pressure30.45 inHg
Wind15.8 mph N
Humidity65%
Visibility—
Dew point36°
Sun, 2559° / 50°0
59 °
Stony Brook, Sunday, 25 October
Clear. High 59°, low 50°.
Pressure30.53 inHg
Wind11.4 mph SW
Humidity44%
Visibility—
Dew point32°
Mon, 2662° / 54°0
62 °
Stony Brook, Monday, 26 October
Overcast. High 62°, low 54°.
Pressure30.33 inHg
Wind13.8 mph SW
Humidity62%
Visibility—
Dew point44°
Tue, 2764° / 58°0
64 °
Stony Brook, Tuesday, 27 October
Overcast. High 64°, low 58°.
Pressure30.27 inHg
Wind12 mph SW
Humidity63%
Visibility—
Dew point49°
Wed, 2864° / 49°0.15
64 °
Stony Brook, Wednesday, 28 October
Light rain. High 64°, low 49°.
Pressure29.88 inHg
Wind26.3 mph NW
Humidity76%
Visibility—
Dew point56°
Thu, 2947° / 40°0
47 °
Stony Brook, Thursday, 29 October
Clear. High 47°, low 40°.
Pressure29.97 inHg
Wind23.1 mph NW
Humidity53%
Visibility—
Dew point26°
Fri, 3055° / 45°0
55 °
Stony Brook, Friday, 30 October
Clear. High 55°, low 45°.
Pressure30.18 inHg
Wind17.4 mph SW
Humidity47%
Visibility—
Dew point29°
Sat, 3159° / 52°0
59 °
Stony Brook, Saturday, 31 October
Overcast. High 59°, low 52°.
Pressure30.27 inHg
Wind14.2 mph SW
Humidity49%
Visibility—
Dew point36°
Sun, 0162° / 56°0.13
62 °
Stony Brook, Sunday, 1 November
Light rain. High 62°, low 56°.
Pressure30.30 inHg
Wind12.2 mph E
Humidity69%
Visibility—
Dew point49°
Mon, 0261° / 58°0.17
61 °
Stony Brook, Monday, 2 November
Light rain. High 61°, low 58°.
Pressure29.83 inHg
Wind18 mph NE
Humidity87%
Visibility—
Dew point55°
Tue, 0357° / 52°0.76
57 °
Stony Brook, Tuesday, 3 November
Rain. High 57°, low 52°.
Pressure29.29 inHg
Wind23.4 mph NE
Humidity84%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0456° / 46°0.05
56 °
Stony Brook, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high56°
Average low46°
Average precipitation0.05 in
Chance of precipitation27%
Record high70° (2022)
Record low36° (2013)
Thu, 0556° / 46°0.15
56 °
Stony Brook, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high56°
Average low46°
Average precipitation0.15 in
Chance of precipitation28%
Record high73° (2022)
Record low37° (1965)
Fri, 0655° / 46°0.11
55 °
Stony Brook, Friday, 6 November
Climate normal for this date — 60-year average.
Average high55°
Average low46°
Average precipitation0.11 in
Chance of precipitation30%
Record high75° (2024)
Record low35° (1962)
Sat, 0755° / 45°0.1
55 °
Stony Brook, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high55°
Average low45°
Average precipitation0.1 in
Chance of precipitation25%
Record high75° (2022)
Record low34° (2025)
Sun, 0854° / 44°0.17
54 °
Stony Brook, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high54°
Average low44°
Average precipitation0.17 in
Chance of precipitation30%
Record high72° (2020)
Record low32° (2019)
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)
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.