Weather in Shelter Island, NY
Shelter Island, Sunday, 9 August, 17:58
Clear. Feels like 90°. High 88°, low 71°.
Monthly outlook for Shelter Island, NY: average high 78.4°, average low 69.3°. That is 2.3° above the climate normal for August. Precipitation is expected on 6 days (about 1.2 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 9 August (88.2°), the coolest 17 August (65.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 79° | 74.7° | +2.4° |
| 19 August – 28 August | 77.5° | 73.5° | +2.2° |
| 29 August – 7 September | at normal | 72.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Sag Harbor (5 mi).
0.23
Shelter Island, Monday, 10 August
Heavy rain. High 86°, low 69°.
0
Shelter Island, Tuesday, 11 August
Overcast. High 81°, low 71°.
0.01Shelter Island, Wednesday, 12 August
Light rain. High 79°, low 69°.
0Shelter Island, Thursday, 13 August
Clear. High 80°, low 68°.
0
Shelter Island, Friday, 14 August
Partly cloudy. High 70°, low 67°.
0Shelter Island, Saturday, 15 August
Overcast. High 75°, low 66°.
0.44Shelter Island, Sunday, 16 August
Rain. High 76°, low 70°.
0.11Shelter Island, Monday, 17 August
Light rain. High 77°, low 66°.
0Shelter Island, Tuesday, 18 August
Partly cloudy. High 78°, low 68°.
0.34Shelter Island, Wednesday, 19 August
Rain. High 80°, low 72°.
0Shelter Island, Thursday, 20 August
Partly cloudy. High 78°, low 68°.
0.06Shelter Island, Friday, 21 August
Light rain. High 79°, low 73°.
0Shelter Island, Saturday, 22 August
Overcast. High 74°, low 70°.
0Shelter Island, Sunday, 23 August
Clear. High 74°, low 69°.
0.04Shelter Island, Monday, 24 August
Light rain. High 80°, low 70°.
0.1Shelter Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06
Shelter Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.09Shelter Island, Thursday, 27 August
Climate normal for this date — 60-year average.
0.16Shelter Island, Friday, 28 August
Climate normal for this date — 60-year average.
0.17
Shelter Island, Saturday, 29 August
Climate normal for this date — 60-year average.
0.1Shelter Island, Sunday, 30 August
Climate normal for this date — 60-year average.
0.06Shelter Island, Monday, 31 August
Climate normal for this date — 60-year average.
0.07Shelter Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.21Shelter Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.1Shelter Island, Thursday, 3 September
Climate normal for this date — 60-year average.
0.14Shelter Island, Friday, 4 September
Climate normal for this date — 60-year average.
0.05Shelter Island, Saturday, 5 September
Climate normal for this date — 60-year average.
0.12Shelter Island, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1Shelter Island, 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 Shelter Island, 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 Shelter Island, 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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