Weather in South Setauket, NY
South Setauket, Sunday, 9 August, 11:25
Overcast. Feels like 93°. High 88°, low 72°.
Monthly outlook for South Setauket, NY: average high 80°, average low 69.4°. That is 0.7° above the climate normal for August. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 10 August (87.6°), the coolest 15 August (64.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.2° | 79.6° | +0.3° |
| 19 August – 28 August | 79.7° | 77.9° | +1° |
| 29 August – 7 September | at normal | 76.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Stony Brook University (1 mi).
0.01
South Setauket, Monday, 10 August
Light rain. High 88°, low 71°.
0.01South Setauket, Tuesday, 11 August
Light rain. High 85°, low 74°.
0South Setauket, Wednesday, 12 August
Overcast. High 80°, low 71°.
0
South Setauket, Thursday, 13 August
Clear. High 82°, low 72°.
0
South Setauket, Friday, 14 August
Mostly clear. High 78°, low 67°.
0South Setauket, Saturday, 15 August
Clear. High 76°, low 64°.
0South Setauket, Sunday, 16 August
Overcast. High 75°, low 65°.
0.42South Setauket, Monday, 17 August
Rain. High 72°, low 66°.
0South Setauket, Tuesday, 18 August
Overcast. High 78°, low 65°.
0
South Setauket, Wednesday, 19 August
Partly cloudy. High 78°, low 72°.
0.04South Setauket, Thursday, 20 August
Light rain. High 82°, low 71°.
0South Setauket, Friday, 21 August
Partly cloudy. High 78°, low 67°.
0South Setauket, Saturday, 22 August
Clear. High 81°, low 72°.
0.07South Setauket, Sunday, 23 August
Light rain. High 86°, low 73°.
0South Setauket, Monday, 24 August
Clear. High 74°, low 67°.
0.09South Setauket, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09South Setauket, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11South Setauket, Thursday, 27 August
Climate normal for this date — 60-year average.
0.18
South Setauket, Friday, 28 August
Climate normal for this date — 60-year average.
0.16South Setauket, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08South Setauket, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05South Setauket, Monday, 31 August
Climate normal for this date — 60-year average.
0.07South Setauket, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.19South Setauket, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11South Setauket, Thursday, 3 September
Climate normal for this date — 60-year average.
0.12South Setauket, Friday, 4 September
Climate normal for this date — 60-year average.
0.05South Setauket, Saturday, 5 September
Climate normal for this date — 60-year average.
0.14South Setauket, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1South Setauket, Monday, 7 September
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 South Setauket, 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 South Setauket, 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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