Weather in South Valley Stream, NY
South Valley Stream, Sunday, 9 August, 07:06
Clear. Feels like 78°. High 90°, low 74°.
Monthly outlook for South Valley Stream, NY: average high 83.9°, average low 73.4°. That is 2.3° above the climate normal for August. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 9 August (90.2°), the coolest 15 August (65°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 83° | 80.3° | +1.5° |
| 19 August – 28 August | 85.3° | 78.9° | +3.6° |
| 29 August – 7 September | at normal | 77.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Valley Stream (1 mi).
0
South Valley Stream, Monday, 10 August
Light rain. High 86°, low 73°.
0.03South Valley Stream, Tuesday, 11 August
Light rain. High 89°, low 76°.
0
South Valley Stream, Wednesday, 12 August
Overcast. High 82°, low 78°.
0.1South Valley Stream, Thursday, 13 August
Light rain. High 84°, low 73°.
0South Valley Stream, Friday, 14 August
Clear. High 79°, low 66°.
0South Valley Stream, Saturday, 15 August
Clear. High 80°, low 65°.
0
South Valley Stream, Sunday, 16 August
Partly cloudy. High 80°, low 69°.
0.05South Valley Stream, Monday, 17 August
Light rain. High 79°, low 73°.
0South Valley Stream, Tuesday, 18 August
Clear. High 81°, low 71°.
0
South Valley Stream, Wednesday, 19 August
Mostly clear. High 82°, low 75°.
0South Valley Stream, Thursday, 20 August
Clear. High 83°, low 75°.
0.02South Valley Stream, Friday, 21 August
Light rain. High 83°, low 75°.
0.06South Valley Stream, Saturday, 22 August
Light rain. High 90°, low 76°.
0South Valley Stream, Sunday, 23 August
Clear. High 88°, low 78°.
0.33South Valley Stream, Monday, 24 August
Rain. High 86°, low 78°.
0.07South Valley Stream, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06South Valley Stream, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13
South Valley Stream, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19South Valley Stream, Friday, 28 August
Climate normal for this date — 60-year average.
0.13South Valley Stream, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07South Valley Stream, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05South Valley Stream, Monday, 31 August
Climate normal for this date — 60-year average.
0.08South Valley Stream, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.15South Valley Stream, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11South Valley Stream, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11South Valley Stream, Friday, 4 September
Climate normal for this date — 60-year average.
0.05South Valley Stream, Saturday, 5 September
Climate normal for this date — 60-year average.
0.19South Valley Stream, Sunday, 6 September
Climate normal for this date — 60-year average.
0.09South Valley Stream, 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 South Valley Stream, 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 South Valley Stream, 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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