Monthly outlook for Great River, NY: average high 58.7°, average low 48.3°. That is 1.5° above the climate normal for October. Precipitation is expected on 4 days (about 2.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (69.3°), the coolest 28 October (38.7°).
58.7°/48.3°
Average high / low
+1.5°
Above normal
4 / 5
Wet days / normal
2.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
28 October – 6 November
61.9°
57.1°
+2.6°
7 November – 16 November
53.4°
53.3°
+0.1°
17 November – 26 November
at normal
49.9°
—
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).
Thu, 2966° / 45°0
66 °
Great River, Thursday, 29 October
Clear. High 66°, low 45°.
Pressure30.27 inHg
Wind6.7 mph SW
Humidity63%
Visibility6.2 mi
Dew point50°
Fri, 3069° / 49°0
69 °
Great River, Friday, 30 October
Clear. High 69°, low 49°.
Pressure30.06 inHg
Wind9 mph NW
Humidity62%
Visibility6.2 mi
Dew point54°
Sat, 3157° / 47°0
57 °
Great River, Saturday, 31 October
Clear. High 57°, low 47°.
Pressure30.39 inHg
Wind7.4 mph N
Humidity53%
Visibility6.2 mi
Dew point37°
Sun, 0159° / 43°0
59 °
Great River, Sunday, 1 November
Overcast. High 59°, low 43°.
Pressure30.42 inHg
Wind2.7 mph S
Humidity51%
Visibility6.2 mi
Dew point38°
Mon, 0265° / 48°0
65 °
Great River, Monday, 2 November
Clear. High 65°, low 48°.
Pressure30.36 inHg
Wind5.2 mph W
Humidity62%
Visibility—
Dew point46°
Tue, 0359° / 54°0.04
59 °
Great River, Tuesday, 3 November
Light rain. High 59°, low 54°.
Pressure30.21 inHg
Wind16.8 mph E
Humidity71%
Visibility—
Dew point49°
Wed, 0456° / 51°0.03
56 °
Great River, Wednesday, 4 November
Light rain. High 56°, low 51°.
Pressure30.36 inHg
Wind16.3 mph E
Humidity57%
Visibility—
Dew point38°
Thu, 0563° / 57°0
63 °
Great River, Thursday, 5 November
Light rain. High 63°, low 57°.
Pressure30.09 inHg
Wind20.3 mph SE
Humidity92%
Visibility—
Dew point58°
Fri, 0664° / 55°0.49
64 °
Great River, Friday, 6 November
Rain. High 64°, low 55°.
Pressure29.47 inHg
Wind24 mph SE
Humidity79%
Visibility—
Dew point55°
Sat, 0753° / 48°0
53 °
Great River, Saturday, 7 November
Mostly clear. High 53°, low 48°.
Pressure30.03 inHg
Wind15.4 mph NW
Humidity48%
Visibility—
Dew point30°
Sun, 0850° / 45°0
50 °
Great River, Sunday, 8 November
Partly cloudy. High 50°, low 45°.
Pressure30.33 inHg
Wind8.3 mph N
Humidity48%
Visibility—
Dew point29°
Mon, 0951° / 43°0
51 °
Great River, Monday, 9 November
Clear. High 51°, low 43°.
Pressure30.42 inHg
Wind6.6 mph NE
Humidity43%
Visibility—
Dew point26°
Tue, 1052° / 44°0
52 °
Great River, Tuesday, 10 November
Clear. High 52°, low 44°.
Pressure30.36 inHg
Wind5.7 mph S
Humidity38%
Visibility—
Dew point25°
Wed, 1157° / 50°0.05
57 °
Great River, Wednesday, 11 November
Light rain. High 57°, low 50°.
Pressure30.18 inHg
Wind15.3 mph E
Humidity68%
Visibility—
Dew point44°
Thu, 1257° / 53°1.61
57 °
Great River, Thursday, 12 November
Rain. High 57°, low 53°.
Pressure29.85 inHg
Wind29.5 mph NE
Humidity90%
Visibility—
Dew point51°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 1351° / 42°0.23
51 °
Great River, Friday, 13 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.23 in
Chance of precipitation40%
Record high66° (1964)
Record low26° (2019)
Sat, 1451° / 42°0.11
51 °
Great River, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high51°
Average low42°
Average precipitation0.11 in
Chance of precipitation23%
Record high64° (1989)
Record low28° (1986)
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)
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.