Weather in Port Jefferson Station, NY
Port Jefferson Station, Sunday, 9 August, 11:24
Overcast. Feels like 92°. High 87°, low 72°.
Monthly outlook for Port Jefferson Station, NY: average high 80.1°, average low 69.8°. That is 0.7° above the climate normal for August. Precipitation is expected on 2 days (about 0.6 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 10 August (88.1°), the coolest 15 August (65.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 80.2° | 79.6° | +0.4° |
| 19 August – 28 August | 79.8° | 77.9° | +1° |
| 29 August – 7 September | at normal | 76.4° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Stony Brook University (3 mi).
0.01
Port Jefferson Station, Monday, 10 August
Light rain. High 88°, low 71°.
0.01Port Jefferson Station, Tuesday, 11 August
Light rain. High 85°, low 74°.
0Port Jefferson Station, Wednesday, 12 August
Overcast. High 80°, low 72°.
0
Port Jefferson Station, Thursday, 13 August
Clear. High 82°, low 73°.
0Port Jefferson Station, Friday, 14 August
Clear. High 78°, low 67°.
0Port Jefferson Station, Saturday, 15 August
Clear. High 77°, low 65°.
0Port Jefferson Station, Sunday, 16 August
Overcast. High 75°, low 66°.
0.42Port Jefferson Station, Monday, 17 August
Rain. High 72°, low 67°.
0Port Jefferson Station, Tuesday, 18 August
Overcast. High 78°, low 66°.
0
Port Jefferson Station, Wednesday, 19 August
Partly cloudy. High 78°, low 72°.
0.04Port Jefferson Station, Thursday, 20 August
Light rain. High 83°, low 72°.
0Port Jefferson Station, Friday, 21 August
Partly cloudy. High 78°, low 67°.
0Port Jefferson Station, Saturday, 22 August
Clear. High 81°, low 72°.
0.08Port Jefferson Station, Sunday, 23 August
Light rain. High 85°, low 73°.
0Port Jefferson Station, Monday, 24 August
Clear. High 74°, low 67°.
0.09Port Jefferson Station, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Port Jefferson Station, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Port Jefferson Station, Thursday, 27 August
Climate normal for this date — 60-year average.
0.18
Port Jefferson Station, Friday, 28 August
Climate normal for this date — 60-year average.
0.16Port Jefferson Station, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08Port Jefferson Station, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05
Port Jefferson Station, Monday, 31 August
Climate normal for this date — 60-year average.
0.07Port Jefferson Station, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.19Port Jefferson Station, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Port Jefferson Station, Thursday, 3 September
Climate normal for this date — 60-year average.
0.12Port Jefferson Station, Friday, 4 September
Climate normal for this date — 60-year average.
0.05Port Jefferson Station, Saturday, 5 September
Climate normal for this date — 60-year average.
0.14Port Jefferson Station, Sunday, 6 September
Climate normal for this date — 60-year average.
0.1Port Jefferson Station, 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 Port Jefferson Station, 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 Port Jefferson Station, 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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