Weather in Middle Island, NY
Middle Island, Sunday, 9 August, 00:29
Partly cloudy. Feels like 78°. High 91°, low 74°.
Monthly outlook for Middle Island, NY: average high 80.4°, average low 69.7°. That is 1.5° above the climate normal for August. Precipitation is expected on 4 days (about 1.7 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 9 August (90.5°), the coolest 22 August (65.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.6° | 78.3° | +1.8° |
| 19 August – 28 August | 78.5° | 76.8° | +0.9° |
| 29 August – 7 September | at normal | 75.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Brookhaven (4 mi).
0.03
Middle Island, Monday, 10 August
Light rain. High 89°, low 73°.
0
Middle Island, Tuesday, 11 August
Overcast. High 86°, low 76°.
0.15Middle Island, Wednesday, 12 August
Light rain. High 78°, low 71°.
0.17Middle Island, Thursday, 13 August
Light rain. High 83°, low 70°.
0
Middle Island, Friday, 14 August
Clear. High 78°, low 65°.
0Middle Island, Saturday, 15 August
Clear. High 79°, low 67°.
0
Middle Island, Sunday, 16 August
Partly cloudy. High 77°, low 66°.
0Middle Island, Monday, 17 August
Overcast. High 78°, low 70°.
0.08Middle Island, Tuesday, 18 August
Light rain. High 77°, low 68°.
0Middle Island, Wednesday, 19 August
Overcast. High 78°, low 70°.
1.26Middle Island, Thursday, 20 August
Heavy rain. High 80°, low 68°.
0Middle Island, Friday, 21 August
Overcast. High 77°, low 66°.
0Middle Island, Saturday, 22 August
Clear. High 77°, low 65°.
0Middle Island, Sunday, 23 August
Light rain. High 77°, low 71°.
0Middle Island, Monday, 24 August
Clear. High 83°, low 75°.
0.09Middle Island, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Middle Island, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.12Middle Island, Thursday, 27 August
Climate normal for this date — 60-year average.
0.18
Middle Island, Friday, 28 August
Climate normal for this date — 60-year average.
0.15Middle Island, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07Middle Island, Sunday, 30 August
Climate normal for this date — 60-year average.
0.04
Middle Island, Monday, 31 August
Climate normal for this date — 60-year average.
0.06Middle Island, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.2Middle Island, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Middle Island, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Middle Island, Friday, 4 September
Climate normal for this date — 60-year average.
0.05Middle Island, Saturday, 5 September
Climate normal for this date — 60-year average.
0.14Middle Island, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1Middle Island, Monday, 7 September
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 Middle Island, 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 Middle Island, 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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