Weather in West Islip, NY
West Islip, Saturday, 8 August, 18:13
Partly cloudy. Feels like 89°. High 88°, low 72°.
Monthly outlook for West Islip, NY: average high 81.8°, average low 70.6°. That is 2.2° above the climate normal for August. Precipitation is expected on 6 days (about 2.0 inches), against a normal of 5 days and 2.3 inches. The warmest day looks like 11 August (92°), the coolest 23 August (63.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 84.3° | 78.4° | +3.3° |
| 18 August – 27 August | 77.7° | 76.9° | +0.4° |
| 28 August – 6 September | at normal | 75.8° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — South Farmingdale (8 mi).
0
West Islip, Sunday, 9 August
Light rain. High 91°, low 75°.
0.01West Islip, Monday, 10 August
Light rain. High 87°, low 73°.
0.02West Islip, Tuesday, 11 August
Light rain. High 92°, low 78°.
0.25West Islip, Wednesday, 12 August
Rain. High 82°, low 73°.
0.07West Islip, Thursday, 13 August
Light rain. High 88°, low 71°.
0
West Islip, Friday, 14 August
Overcast. High 79°, low 70°.
0
West Islip, Saturday, 15 August
Clear. High 78°, low 65°.
0West Islip, Sunday, 16 August
Partly cloudy. High 80°, low 67°.
0West Islip, Monday, 17 August
Partly cloudy. High 78°, low 70°.
0.27West Islip, Tuesday, 18 August
Light rain. High 79°, low 73°.
0.1West Islip, Wednesday, 19 August
Light rain. High 82°, low 72°.
0.01West Islip, Thursday, 20 August
Light rain. High 78°, low 71°.
0.83West Islip, Friday, 21 August
Rain. High 75°, low 69°.
0.43West Islip, Saturday, 22 August
Rain. High 79°, low 70°.
0West Islip, Sunday, 23 August
Partly cloudy. High 72°, low 63°.
0.08West Islip, Monday, 24 August
Climate normal for this date — 60-year average.
0.09West Islip, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.07West Islip, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13
West Islip, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19West Islip, Friday, 28 August
Climate normal for this date — 60-year average.
0.14West Islip, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08West Islip, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05West Islip, Monday, 31 August
Climate normal for this date — 60-year average.
0.07West Islip, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.15West Islip, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11West Islip, Thursday, 3 September
Climate normal for this date — 60-year average.
0.12West Islip, Friday, 4 September
Climate normal for this date — 60-year average.
0.05
West Islip, Saturday, 5 September
Climate normal for this date — 60-year average.
0.17West Islip, Sunday, 6 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 West Islip, 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 West Islip, 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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