Weather in Old Mastic, NY
Old Mastic, Sunday, 25 October, 04:04
Clear. Feels like 44°. High 65°, low 40°.
Monthly outlook for Old Mastic, NY: average high 60.2°, average low 49.6°. That is 1.9° above the climate normal for October. Precipitation is expected on 4 days (about 1.5 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 30 October (69.9°), the coolest 25 October (40°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 25 October – 3 November | 61.8° | 57.8° | +2.2° |
| 4 November – 13 November | 57.7° | 54.3° | +1.9° |
| 14 November – 23 November | at normal | 50.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Brookhaven (8 mi).
0
Old Mastic, Monday, 26 October
Clear. High 66°, low 40°.
0Old Mastic, Tuesday, 27 October
Clear. High 56°, low 45°.
0Old Mastic, Wednesday, 28 October
Clear. High 56°, low 43°.
0Old Mastic, Thursday, 29 October
Clear. High 62°, low 49°.
0
Old Mastic, Friday, 30 October
Mostly clear. High 70°, low 56°.
0Old Mastic, Saturday, 31 October
Clear. High 57°, low 54°.
0Old Mastic, Sunday, 1 November
Mostly clear. High 61°, low 57°.
0.5
Old Mastic, Monday, 2 November
Rain. High 62°, low 59°.
0Old Mastic, Tuesday, 3 November
Clear. High 62°, low 52°.
0.11Old Mastic, Wednesday, 4 November
Light rain. High 57°, low 48°.
0.78Old Mastic, Thursday, 5 November
Rain. High 63°, low 58°.
0
Old Mastic, Friday, 6 November
Overcast. High 54°, low 46°.
0.01Old Mastic, Saturday, 7 November
Light rain. High 57°, low 45°.
0.06Old Mastic, Sunday, 8 November
Light rain. High 65°, low 54°.
0Old Mastic, Monday, 9 November
Mostly clear. High 51°, low 47°.
0.17
Old Mastic, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.15Old Mastic, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.16Old Mastic, Thursday, 12 November
Climate normal for this date — 60-year average.
0.23Old Mastic, Friday, 13 November
Climate normal for this date — 60-year average.
0.11
Old Mastic, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Old Mastic, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15Old Mastic, Monday, 16 November
Climate normal for this date — 60-year average.
0.15Old Mastic, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Old Mastic, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.07Old Mastic, Thursday, 19 November
Climate normal for this date — 60-year average.
0.13Old Mastic, Friday, 20 November
Climate normal for this date — 60-year average.
0.11Old Mastic, Saturday, 21 November
Climate normal for this date — 60-year average.
0.16Old Mastic, Sunday, 22 November
Climate normal for this date — 60-year average.
0.13Old Mastic, Monday, 23 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 Old Mastic, 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 Old Mastic, 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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