Weather in Holtsville, NY
Holtsville, Friday, 30 October, 01:03
Clear. Feels like 57°. High 68°, low 47°.
Monthly outlook for Holtsville, NY: average high 57.2°, average low 46.5°. That is 1° above the climate normal for October. Precipitation is expected on 6 days (about 4.5 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 3 November (70.6°), the coolest 12 November (39.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 62.3° | 56.6° | +3.1° |
| 9 November – 18 November | 48.7° | 52.6° | -2.2° |
| 19 November – 28 November | at normal | 50° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Patchogue (4 mi).
0
Holtsville, Saturday, 31 October
Clear. High 54°, low 40°.
0
Holtsville, Sunday, 1 November
Partly cloudy. High 60°, low 42°.
0Holtsville, Monday, 2 November
Clear. High 65°, low 48°.
0Holtsville, Tuesday, 3 November
Clear. High 71°, low 50°.
0
Holtsville, Wednesday, 4 November
Light rain. High 66°, low 49°.
0.13Holtsville, Thursday, 5 November
Light rain. High 64°, low 56°.
3.11Holtsville, Friday, 6 November
Heavy rain. High 63°, low 60°.
0Holtsville, Saturday, 7 November
Clear. High 60°, low 48°.
0Holtsville, Sunday, 8 November
Clear. High 52°, low 44°.
0
Holtsville, Monday, 9 November
Overcast. High 48°, low 43°.
0.43Holtsville, Tuesday, 10 November
Rain. High 51°, low 44°.
0.15Holtsville, Wednesday, 11 November
Light rain. High 46°, low 43°.
0Holtsville, Thursday, 12 November
Clear. High 47°, low 40°.
0.56Holtsville, Friday, 13 November
Rain. High 50°, low 45°.
0.07Holtsville, Saturday, 14 November
Light rain. High 51°, low 45°.
0.12
Holtsville, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15Holtsville, Monday, 16 November
Climate normal for this date — 60-year average.
0.14Holtsville, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.08Holtsville, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Holtsville, Thursday, 19 November
Climate normal for this date — 60-year average.
0.12Holtsville, Friday, 20 November
Climate normal for this date — 60-year average.
0.1Holtsville, Saturday, 21 November
Climate normal for this date — 60-year average.
0.16Holtsville, Sunday, 22 November
Climate normal for this date — 60-year average.
0.12Holtsville, Monday, 23 November
Climate normal for this date — 60-year average.
0.1Holtsville, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.14Holtsville, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.21Holtsville, Thursday, 26 November
Climate normal for this date — 60-year average.
0.12Holtsville, Friday, 27 November
Climate normal for this date — 60-year average.
0.16Holtsville, Saturday, 28 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 Holtsville, 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 Holtsville, 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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