Monthly outlook for Great River, NY: average high 63.5°, average low 53.1°. That is 4.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (69.4°), the coolest 1 November (38.3°).
63.5°/53.1°
Average high / low
+4.6°
Above normal
2 / 5
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
30 October – 8 November
64.4°
56.5°
+4.4°
9 November – 18 November
62.2°
52.5°
+5.4°
19 November – 28 November
at normal
49.8°
—
October records over 66 years
82.9°8 October 2007All-time high
33.6°27 October 1976All-time low
Climate normals and records are computed from the nearest reference point — Islip (2 mi).
Sat, 3156° / 42°0
56 °
Great River, Saturday, 31 October
Clear. High 56°, low 42°.
Pressure30.42 inHg
Wind7.6 mph N
Humidity49%
Visibility6.2 mi
Dew point33°
Sun, 0157° / 38°0
57 °
Great River, Sunday, 1 November
Overcast. High 57°, low 38°.
Pressure30.53 inHg
Wind2.3 mph NW
Humidity47%
Visibility6.2 mi
Dew point34°
Mon, 0264° / 48°0
64 °
Great River, Monday, 2 November
Partly cloudy. High 64°, low 48°.
Pressure30.39 inHg
Wind7 mph SW
Humidity50%
Visibility6.2 mi
Dew point44°
Tue, 0367° / 50°0
67 °
Great River, Tuesday, 3 November
Overcast. High 67°, low 50°.
Pressure30.33 inHg
Wind2.1 mph S
Humidity54%
Visibility6.2 mi
Dew point47°
Wed, 0467° / 52°0
67 °
Great River, Wednesday, 4 November
Partly cloudy. High 67°, low 52°.
Pressure30.27 inHg
Wind5.6 mph S
Humidity68%
Visibility—
Dew point53°
Thu, 0566° / 59°0
66 °
Great River, Thursday, 5 November
Overcast. High 66°, low 59°.
Pressure30.15 inHg
Wind9.7 mph S
Humidity80%
Visibility—
Dew point58°
Fri, 0667° / 60°0.02
67 °
Great River, Friday, 6 November
Light rain. High 67°, low 60°.
Pressure30.12 inHg
Wind5.3 mph W
Humidity69%
Visibility—
Dew point53°
Sat, 0762° / 57°0
62 °
Great River, Saturday, 7 November
Mostly clear. High 62°, low 57°.
Pressure30.24 inHg
Wind7.9 mph E
Humidity68%
Visibility—
Dew point51°
Sun, 0867° / 58°0
67 °
Great River, Sunday, 8 November
Overcast. High 67°, low 58°.
Pressure30.24 inHg
Wind4 mph W
Humidity71%
Visibility—
Dew point53°
Mon, 0965° / 59°0
65 °
Great River, Monday, 9 November
Partly cloudy. High 65°, low 59°.
Pressure30.30 inHg
Wind6.7 mph N
Humidity62%
Visibility—
Dew point49°
Tue, 1063° / 55°0
63 °
Great River, Tuesday, 10 November
Clear. High 63°, low 55°.
Pressure30.24 inHg
Wind8.9 mph N
Humidity49%
Visibility—
Dew point40°
Wed, 1162° / 54°0
62 °
Great River, Wednesday, 11 November
Overcast. High 62°, low 54°.
Pressure30.06 inHg
Wind8.5 mph SW
Humidity56%
Visibility—
Dew point43°
Thu, 1259° / 55°0.05
59 °
Great River, Thursday, 12 November
Light rain. High 59°, low 55°.
Pressure30.00 inHg
Wind8.6 mph E
Humidity82%
Visibility—
Dew point52°
Fri, 1362° / 53°0
62 °
Great River, Friday, 13 November
Overcast. High 62°, low 53°.
Pressure30.09 inHg
Wind8.2 mph S
Humidity80%
Visibility—
Dew point52°
Sat, 1462° / 58°0.16
62 °
Great River, Saturday, 14 November
Light rain. High 62°, low 58°.
Pressure29.91 inHg
Wind15.5 mph S
Humidity86%
Visibility—
Dew point57°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 1552° / 43°0.12
52 °
Great River, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high52°
Average low43°
Average precipitation0.12 in
Chance of precipitation43%
Record high70° (1993)
Record low26° (1967)
Mon, 1652° / 42°0.15
52 °
Great River, Monday, 16 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.15 in
Chance of precipitation37%
Record high65° (2006)
Record low25° (1967)
Tue, 1751° / 42°0.14
51 °
Great River, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.14 in
Chance of precipitation37%
Record high65° (2006)
Record low31° (1967)
Wed, 1851° / 42°0.08
51 °
Great River, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.08 in
Chance of precipitation23%
Record high64° (2024)
Record low30° (2014)
Thu, 1951° / 42°0.07
51 °
Great River, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.07 in
Chance of precipitation28%
Record high62° (2021)
Record low26° (2014)
Fri, 2051° / 41°0.12
51 °
Great River, Friday, 20 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.12 in
Chance of precipitation32%
Record high66° (1985)
Record low29° (1984)
Sat, 2150° / 40°0.1
50 °
Great River, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high50°
Average low40°
Average precipitation0.1 in
Chance of precipitation30%
Record high62° (2020)
Record low22° (1987)
Sun, 2249° / 40°0.16
49 °
Great River, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.16 in
Chance of precipitation37%
Record high61° (2007)
Record low21° (2018)
Mon, 2348° / 39°0.13
48 °
Great River, Monday, 23 November
Climate normal for this date — 60-year average.
Average high48°
Average low39°
Average precipitation0.13 in
Chance of precipitation23%
Record high64° (1992)
Record low20° (2018)
Tue, 2449° / 40°0.09
49 °
Great River, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.09 in
Chance of precipitation28%
Record high62° (1979)
Record low26° (2013)
Wed, 2549° / 40°0.14
49 °
Great River, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high49°
Average low40°
Average precipitation0.14 in
Chance of precipitation33%
Record high63° (1979)
Record low25° (2005)
Thu, 2651° / 41°0.21
51 °
Great River, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.21 in
Chance of precipitation43%
Record high63° (1979)
Record low29° (1978)
Fri, 2750° / 41°0.13
50 °
Great River, Friday, 27 November
Climate normal for this date — 60-year average.
Average high50°
Average low41°
Average precipitation0.13 in
Chance of precipitation35%
Record high61° (1986)
Record low29° (1978)
Sat, 2851° / 41°0.16
51 °
Great River, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.16 in
Chance of precipitation40%
Record high62° (1990)
Record low26° (2002)
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 Great River, 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 Great River, 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.