Monthly outlook for Stony Brook, NY: average high 60.9°, average low 51.2°. That is 0.2° above the climate normal for October. Precipitation is expected on 3 days (about 0.8 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 14 October (72°), the coolest 18 October (39.5°).
60.9°/51.2°
Average high / low
+0.2°
Above normal
3 / 5
Wet days / normal
0.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
12 October – 21 October
62.9°
61.5°
+0.8°
22 October – 31 October
57.7°
58.3°
-0.3°
1 November – 10 November
at normal
55.7°
—
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, 1368° / 53°0.01
68 °
Stony Brook, Tuesday, 13 October
Light rain. High 68°, low 53°.
Pressure29.97 inHg
Wind8.5 mph SE
Humidity79%
Visibility6.2 mi
Dew point60°
Wed, 1472° / 65°0
72 °
Stony Brook, Wednesday, 14 October
Mostly clear. High 72°, low 65°.
Pressure29.85 inHg
Wind12 mph W
Humidity81%
Visibility6.2 mi
Dew point64°
Thu, 1564° / 57°0
64 °
Stony Brook, Thursday, 15 October
Overcast. High 64°, low 57°.
Pressure30.21 inHg
Wind9.9 mph N
Humidity58%
Visibility6.2 mi
Dew point44°
Fri, 1664° / 55°0.34
64 °
Stony Brook, Friday, 16 October
Rain. High 64°, low 55°.
Pressure29.71 inHg
Wind28.9 mph W
Humidity90%
Visibility—
Dew point57°
Sat, 1754° / 46°0
54 °
Stony Brook, Saturday, 17 October
Clear. High 54°, low 46°.
Pressure30.09 inHg
Wind24.8 mph NW
Humidity53%
Visibility—
Dew point32°
Sun, 1852° / 40°0
52 °
Stony Brook, Sunday, 18 October
Clear. High 52°, low 40°.
Pressure30.56 inHg
Wind15.6 mph SW
Humidity35%
Visibility—
Dew point17°
Mon, 1962° / 51°0
62 °
Stony Brook, Monday, 19 October
Clear. High 62°, low 51°.
Pressure30.50 inHg
Wind16.2 mph SW
Humidity50%
Visibility—
Dew point37°
Tue, 2066° / 56°0
66 °
Stony Brook, Tuesday, 20 October
Overcast. High 66°, low 56°.
Pressure30.33 inHg
Wind13.1 mph W
Humidity52%
Visibility—
Dew point42°
Wed, 2159° / 53°0
59 °
Stony Brook, Wednesday, 21 October
Clear. High 59°, low 53°.
Pressure30.45 inHg
Wind15.1 mph NE
Humidity53%
Visibility—
Dew point38°
Thu, 2257° / 51°0
57 °
Stony Brook, Thursday, 22 October
Partly cloudy. High 57°, low 51°.
Pressure30.59 inHg
Wind9.2 mph S
Humidity58%
Visibility—
Dew point40°
Fri, 2363° / 55°0.01
63 °
Stony Brook, Friday, 23 October
Light rain. High 63°, low 55°.
Pressure30.33 inHg
Wind20.8 mph SW
Humidity63%
Visibility—
Dew point46°
Sat, 2456° / 45°0.24
56 °
Stony Brook, Saturday, 24 October
Rain. High 56°, low 45°.
Pressure30.15 inHg
Wind21.5 mph W
Humidity60%
Visibility—
Dew point41°
Sun, 2555° / 43°0
55 °
Stony Brook, Sunday, 25 October
Clear. High 55°, low 43°.
Pressure30.30 inHg
Wind13.7 mph N
Humidity42%
Visibility—
Dew point24°
Mon, 2659° / 50°0.19
59 °
Stony Brook, Monday, 26 October
Rain. High 59°, low 50°.
Pressure29.83 inHg
Wind15.2 mph W
Humidity62%
Visibility—
Dew point45°
Tue, 2757° / 46°0
57 °
Stony Brook, Tuesday, 27 October
Clear. High 57°, low 46°.
Pressure29.97 inHg
Wind11.8 mph N
Humidity62%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 2858° / 48°0.17
58 °
Stony Brook, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high58°
Average low48°
Average precipitation0.17 in
Chance of precipitation33%
Record high79° (2023)
Record low33° (1976)
Thu, 2956° / 47°0.19
56 °
Stony Brook, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low47°
Average precipitation0.19 in
Chance of precipitation25%
Record high72° (1984)
Record low34° (1965)
Fri, 3056° / 46°0.12
56 °
Stony Brook, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low46°
Average precipitation0.12 in
Chance of precipitation25%
Record high72° (2024)
Record low36° (2011)
Sat, 3157° / 47°0.06
57 °
Stony Brook, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high57°
Average low47°
Average precipitation0.06 in
Chance of precipitation23%
Record high78° (2024)
Record low35° (2020)
Sun, 0158° / 49°0.14
58 °
Stony Brook, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high58°
Average low49°
Average precipitation0.14 in
Chance of precipitation30%
Record high80° (2024)
Record low37° (1976)
Mon, 0257° / 48°0.08
57 °
Stony Brook, Monday, 2 November
Climate normal for this date — 60-year average.
Average high57°
Average low48°
Average precipitation0.08 in
Chance of precipitation32%
Record high70° (2017)
Record low32° (1965)
Tue, 0357° / 47°0.12
57 °
Stony Brook, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high57°
Average low47°
Average precipitation0.12 in
Chance of precipitation30%
Record high71° (2017)
Record low37° (1996)
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)
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.