Weather in Central Islip, NY
Central Islip, Monday, 12 October, 05:50
Overcast. Feels like 55°. High 69°, low 54°.
Monthly outlook for Central Islip, NY: average high 61.2°, average low 50.1°. That is 0.2° above the climate normal for October. Precipitation is expected on 4 days (about 0.9 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 14 October (77.7°), the coolest 18 October (39.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 63° | 61.7° | +0.7° |
| 22 October – 31 October | 58.1° | 58.5° | -0.2° |
| 1 November – 10 November | at normal | 56° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Brentwood (3 mi).
0.01
Central Islip, Tuesday, 13 October
Light rain. High 67°, low 53°.
0
Central Islip, Wednesday, 14 October
Partly cloudy. High 78°, low 63°.
0Central Islip, Thursday, 15 October
Partly cloudy. High 62°, low 52°.
0.45Central Islip, Friday, 16 October
Rain. High 64°, low 51°.
0
Central Islip, Saturday, 17 October
Mostly clear. High 52°, low 44°.
0
Central Islip, Sunday, 18 October
Clear. High 51°, low 40°.
0Central Islip, Monday, 19 October
Clear. High 62°, low 50°.
0Central Islip, Tuesday, 20 October
Overcast. High 66°, low 54°.
0Central Islip, Wednesday, 21 October
Clear. High 60°, low 53°.
0Central Islip, Thursday, 22 October
Clear. High 59°, low 50°.
0Central Islip, Friday, 23 October
Overcast. High 63°, low 54°.
0.26Central Islip, Saturday, 24 October
Rain. High 56°, low 45°.
0Central Islip, Sunday, 25 October
Clear. High 54°, low 43°.
0.16Central Islip, Monday, 26 October
Light rain. High 59°, low 50°.
0Central Islip, Tuesday, 27 October
Clear. High 57°, low 46°.
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.
0.18Central Islip, Tuesday, 10 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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