Weather in Old Mastic, NY
Old Mastic, Sunday, 18 October, 01:39
Clear. Feels like 37°. High 53°, low 40°.
Monthly outlook for Old Mastic, NY: average high 59.6°, average low 50.4°. That is 0.5° above the climate normal for October. Precipitation is expected on 2 days (about 1.1 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 2 November (64°), the coolest 18 October (40.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 57.9° | 59.6° | -0.9° |
| 28 October – 6 November | 62.3° | 56.9° | +3° |
| 7 November – 16 November | at normal | 53° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Brookhaven (8 mi).
0
Old Mastic, Monday, 19 October
Overcast. High 60°, low 44°.
0
Old Mastic, Tuesday, 20 October
Clear. High 63°, low 52°.
0
Old Mastic, Wednesday, 21 October
Mostly clear. High 55°, low 46°.
0Old Mastic, Thursday, 22 October
Clear. High 60°, low 43°.
0Old Mastic, Friday, 23 October
Clear. High 56°, low 45°.
0Old Mastic, Saturday, 24 October
Clear. High 52°, low 48°.
0Old Mastic, Sunday, 25 October
Mostly clear. High 58°, low 50°.
0Old Mastic, Monday, 26 October
Overcast. High 63°, low 52°.
0Old Mastic, Tuesday, 27 October
Clear. High 58°, low 48°.
0Old Mastic, Wednesday, 28 October
Overcast. High 60°, low 50°.
0Old Mastic, Thursday, 29 October
Overcast. High 61°, low 56°.
0.03
Old Mastic, Friday, 30 October
Light rain. High 64°, low 60°.
0.13Old Mastic, Saturday, 31 October
Rain. High 64°, low 56°.
0.91Old Mastic, Sunday, 1 November
Heavy rain. High 61°, low 55°.
0.01Old Mastic, Monday, 2 November
Light rain. High 64°, low 60°.
0.12
Old Mastic, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.05Old Mastic, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.15Old Mastic, Thursday, 5 November
Climate normal for this date — 60-year average.
0.11Old Mastic, Friday, 6 November
Climate normal for this date — 60-year average.
0.1Old Mastic, Saturday, 7 November
Climate normal for this date — 60-year average.
0.17Old Mastic, Sunday, 8 November
Climate normal for this date — 60-year average.
0.11Old Mastic, Monday, 9 November
Climate normal for this date — 60-year average.
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.
0.11Old 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.
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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