Weather in Central Islip, NY
Central Islip, Sunday, 18 October, 18:08
Clear. Feels like 50°. High 57°, low 36°.
Monthly outlook for Central Islip, NY: average high 60.2°, average low 49.1°. That is 0.7° above the climate normal for October. Precipitation is expected on 1 day (about 0.0 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 26 October (66.7°), the coolest 18 October (35.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 59.1° | 59.8° | -0.4° |
| 28 October – 6 November | 62.1° | 57° | +2.8° |
| 7 November – 16 November | at normal | 53° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Brentwood (3 mi).
0Central Islip, Monday, 19 October
Clear. High 63°, low 44°.
0Central Islip, Tuesday, 20 October
Clear. High 63°, low 50°.
0
Central Islip, Wednesday, 21 October
Overcast. High 55°, low 47°.
0Central Islip, Thursday, 22 October
Clear. High 62°, low 46°.
0Central Islip, Friday, 23 October
Clear. High 51°, low 44°.
0
Central Islip, Saturday, 24 October
Partly cloudy. High 55°, low 42°.
0Central Islip, Sunday, 25 October
Overcast. High 59°, low 48°.
0Central Islip, Monday, 26 October
Clear. High 67°, low 54°.
0Central Islip, Tuesday, 27 October
Overcast. High 59°, low 52°.
0Central Islip, Wednesday, 28 October
Clear. High 56°, low 47°.
0
Central Islip, Thursday, 29 October
Mostly clear. High 60°, low 50°.
0Central Islip, Friday, 30 October
Overcast. High 63°, low 55°.
0.04
Central Islip, Saturday, 31 October
Light rain. High 66°, low 60°.
0Central Islip, Sunday, 1 November
Clear. High 65°, low 56°.
0Central Islip, Monday, 2 November
Overcast. High 63°, low 54°.
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.
0.15Central Islip, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.17Central Islip, Thursday, 12 November
Climate normal for this date — 60-year average.
0.23Central Islip, Friday, 13 November
Climate normal for this date — 60-year average.
0.11Central Islip, Saturday, 14 November
Climate normal for this date — 60-year average.
0.11Central Islip, Sunday, 15 November
Climate normal for this date — 60-year average.
0.14Central Islip, Monday, 16 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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