Weather in Central Islip, NY
Central Islip, Saturday, 8 August, 23:34
Partly cloudy. Feels like 80°. High 88°, low 71°.
Monthly outlook for Central Islip, NY: average high 82.5°, average low 69.7°. That is 2.4° above the climate normal for August. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 11 August (91°), the coolest 22 August (63.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 84.7° | 78.8° | +3.2° |
| 18 August – 27 August | 78.9° | 77.3° | +0.9° |
| 28 August – 6 September | at normal | 76.2° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Islip (3 mi).
0
Central Islip, Sunday, 9 August
Light rain. High 91°, low 74°.
0.01Central Islip, Monday, 10 August
Light rain. High 89°, low 73°.
0
Central Islip, Tuesday, 11 August
Overcast. High 91°, low 77°.
0.08Central Islip, Wednesday, 12 August
Light rain. High 80°, low 72°.
0.15Central Islip, Thursday, 13 August
Light rain. High 86°, low 71°.
0
Central Islip, Friday, 14 August
Clear. High 80°, low 66°.
0Central Islip, Saturday, 15 August
Clear. High 82°, low 67°.
0Central Islip, Sunday, 16 August
Overcast. High 81°, low 66°.
0.01Central Islip, Monday, 17 August
Light rain. High 79°, low 71°.
0.1Central Islip, Tuesday, 18 August
Light rain. High 78°, low 68°.
0Central Islip, Wednesday, 19 August
Overcast. High 79°, low 70°.
1.1Central Islip, Thursday, 20 August
Heavy rain. High 81°, low 68°.
0Central Islip, Friday, 21 August
Overcast. High 78°, low 67°.
0Central Islip, Saturday, 22 August
Clear. High 79°, low 64°.
0Central Islip, Sunday, 23 August
Overcast. High 78°, low 70°.
0.08
Central Islip, Monday, 24 August
Climate normal for this date — 60-year average.
0.09Central Islip, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.08Central Islip, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12
Central Islip, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19Central Islip, Friday, 28 August
Climate normal for this date — 60-year average.
0.14Central Islip, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07Central Islip, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05
Central Islip, Monday, 31 August
Climate normal for this date — 60-year average.
0.06Central Islip, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.19Central Islip, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Central Islip, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Central Islip, Friday, 4 September
Climate normal for this date — 60-year average.
0.05Central Islip, Saturday, 5 September
Climate normal for this date — 60-year average.
0.13Central 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 Central 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 Central 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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