Weather in Central Islip, NY
Central Islip, Sunday, 11 October, 00:25
Partly cloudy. Feels like 56°. High 62°, low 51°.
Monthly outlook for Central Islip, NY: average high 60.6°, average low 48.9°. That is 0.3° below the climate normal for October. Precipitation is expected on 4 days (about 2.0 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 14 October (77°), the coolest 18 October (39.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 62.7° | 61.9° | +0.4° |
| 21 October – 30 October | 57.1° | 58.9° | -1° |
| 31 October – 9 November | at normal | 56.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Brentwood (3 mi).
1.17
Central Islip, Monday, 12 October
Heavy rain. High 70°, low 51°.
0
Central Islip, Tuesday, 13 October
Mostly clear. High 69°, low 57°.
0.01Central Islip, Wednesday, 14 October
Light rain. High 77°, low 64°.
0
Central Islip, Thursday, 15 October
Clear. High 63°, low 52°.
0.06Central Islip, Friday, 16 October
Light rain. High 65°, low 47°.
0.05Central Islip, Saturday, 17 October
Light rain. High 65°, low 50°.
0Central Islip, Sunday, 18 October
Clear. High 48°, low 40°.
0Central Islip, Monday, 19 October
Clear. High 52°, low 42°.
0Central Islip, Tuesday, 20 October
Clear. High 56°, low 45°.
0Central Islip, Wednesday, 21 October
Clear. High 58°, low 48°.
0
Central Islip, Thursday, 22 October
Overcast. High 61°, low 54°.
0
Central Islip, Friday, 23 October
Partly cloudy. High 65°, low 51°.
0Central Islip, Saturday, 24 October
Clear. High 52°, low 45°.
0.04Central Islip, Sunday, 25 October
Light rain. High 52°, low 42°.
0.04Central Islip, Monday, 26 October
Light rain. High 54°, low 45°.
0.16Central Islip, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.17Central Islip, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.19Central Islip, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Central Islip, Friday, 30 October
Climate normal for this date — 60-year average.
0.05Central Islip, Saturday, 31 October
Climate normal for this date — 60-year average.
0.13Central Islip, Sunday, 1 November
Climate normal for this date — 60-year average.
0.08Central Islip, Monday, 2 November
Climate normal for this date — 60-year average.
0.11Central Islip, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.06Central Islip, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.13Central Islip, Thursday, 5 November
Climate normal for this date — 60-year average.
0.11
Central Islip, Friday, 6 November
Climate normal for this date — 60-year average.
0.1Central Islip, Saturday, 7 November
Climate normal for this date — 60-year average.
0.16Central Islip, Sunday, 8 November
Climate normal for this date — 60-year average.
0.09Central Islip, Monday, 9 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 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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