Weather in Great River, NY
Great River, Tuesday, 20 October, 02:40
Clear. Feels like 49°. High 68°, low 46°.
Monthly outlook for Great River, NY: average high 59.4°, average low 47.9°. That is 0.4° above the climate normal for October. Precipitation is expected on 1 day (about 0.8 inches), against a normal of 4 days and 1.9 inches. The warmest day looks like 20 October (67.9°), the coolest 21 October (40°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 59.8° | 59.4° | +0.2° |
| 30 October – 8 November | 58.8° | 56.5° | +1.2° |
| 9 November – 18 November | at normal | 52.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Islip (2 mi).
0
Great River, Wednesday, 21 October
Overcast. High 61°, low 40°.
0
Great River, Thursday, 22 October
Clear. High 61°, low 46°.
0Great River, Friday, 23 October
Clear. High 52°, low 43°.
0Great River, Saturday, 24 October
Clear. High 55°, low 41°.
0Great River, Sunday, 25 October
Clear. High 60°, low 44°.
0Great River, Monday, 26 October
Overcast. High 64°, low 54°.
0Great River, Tuesday, 27 October
Overcast. High 65°, low 59°.
0.01
Great River, Wednesday, 28 October
Light rain. High 60°, low 46°.
0Great River, Thursday, 29 October
Clear. High 52°, low 41°.
0Great River, Friday, 30 October
Clear. High 52°, low 43°.
0Great River, Saturday, 31 October
Clear. High 58°, low 48°.
0Great River, Sunday, 1 November
Clear. High 60°, low 49°.
0Great River, Monday, 2 November
Overcast. High 61°, low 54°.
0.8Great River, Tuesday, 3 November
Rain. High 61°, low 58°.
0Great River, Wednesday, 4 November
Clear. High 61°, low 56°.
0.14
Great River, Thursday, 5 November
Climate normal for this date — 60-year average.
0.11
Great River, Friday, 6 November
Climate normal for this date — 60-year average.
0.1Great River, Saturday, 7 November
Climate normal for this date — 60-year average.
0.16Great River, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Great River, Monday, 9 November
Climate normal for this date — 60-year average.
0.17Great River, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.15Great River, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.17Great River, Thursday, 12 November
Climate normal for this date — 60-year average.
0.23Great River, Friday, 13 November
Climate normal for this date — 60-year average.
0.11Great River, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Great River, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15Great River, Monday, 16 November
Climate normal for this date — 60-year average.
0.14Great River, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.08Great River, Wednesday, 18 November
Climate normal for this date — 60-year average.
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.
Sun and moon today
Weather history
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