Weather in Stony Brook, NY
Stony Brook, Monday, 12 October, 13:27
Mostly clear. Feels like 68°. High 68°, low 54°.
Monthly outlook for Stony Brook, NY: average high 62.6°, average low 53.4°. That is 1.1° 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 (72.3°), the coolest 18 October (44.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 63.7° | 61.5° | +1.2° |
| 22 October – 31 October | 60.8° | 58.3° | +1.4° |
| 1 November – 10 November | at normal | 55.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Stony Brook University (0 mi).
0Stony Brook, Tuesday, 13 October
Mostly clear. High 67°, low 54°.
0
Stony Brook, Wednesday, 14 October
Clear. High 72°, low 65°.
0Stony Brook, Thursday, 15 October
Clear. High 64°, low 56°.
0.59
Stony Brook, Friday, 16 October
Rain. High 66°, low 57°.
0.01Stony Brook, Saturday, 17 October
Light rain. High 55°, low 48°.
0Stony Brook, Sunday, 18 October
Clear. High 55°, low 45°.
0Stony Brook, Monday, 19 October
Clear. High 62°, low 52°.
0
Stony Brook, Tuesday, 20 October
Overcast. High 63°, low 58°.
0Stony Brook, Wednesday, 21 October
Clear. High 64°, low 55°.
0Stony Brook, Thursday, 22 October
Clear. High 53°, low 48°.
0.07Stony Brook, Friday, 23 October
Light rain. High 61°, low 51°.
0
Stony Brook, Saturday, 24 October
Partly cloudy. High 65°, low 58°.
0.01Stony Brook, Sunday, 25 October
Light rain. High 62°, low 56°.
0.06Stony Brook, Monday, 26 October
Light rain. High 62°, low 49°.
0Stony Brook, Tuesday, 27 October
Overcast. High 61°, low 47°.
0.17
Stony Brook, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.19Stony Brook, Thursday, 29 October
Climate normal for this date — 60-year average.
0.12Stony Brook, Friday, 30 October
Climate normal for this date — 60-year average.
0.06Stony Brook, Saturday, 31 October
Climate normal for this date — 60-year average.
0.14Stony Brook, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Stony Brook, Monday, 2 November
Climate normal for this date — 60-year average.
0.12Stony Brook, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.05Stony Brook, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.15Stony Brook, Thursday, 5 November
Climate normal for this date — 60-year average.
0.11Stony Brook, Friday, 6 November
Climate normal for this date — 60-year average.
0.1Stony Brook, Saturday, 7 November
Climate normal for this date — 60-year average.
0.17Stony Brook, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Stony Brook, Monday, 9 November
Climate normal for this date — 60-year average.
0.17Stony Brook, Tuesday, 10 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 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.
Sun and moon today
Weather history
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