Weather in Great Valley, NY
Great Valley, Saturday, 8 August, 23:00
Partly cloudy. Feels like 71°. High 81°, low 66°.
Monthly outlook for Great Valley, NY: average high 75.9°, average low 56.6°. That is 1.6° above the climate normal for August. Precipitation is expected on 8 days (about 1.7 inches), against a normal of 7 days and 2.0 inches. The warmest day looks like 23 August (83.8°), the coolest 22 August (45.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 75.7° | 73.6° | +1.1° |
| 18 August – 27 August | 76.2° | 72.3° | +2.2° |
| 28 August – 6 September | at normal | 71.3° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Franklinville (10 mi).
0
Great Valley, Sunday, 9 August
Clear. High 83°, low 65°.
0.03
Great Valley, Monday, 10 August
Light rain. High 75°, low 64°.
0.87Great Valley, Tuesday, 11 August
Heavy rain. High 82°, low 65°.
0.15Great Valley, Wednesday, 12 August
Light rain. High 76°, low 61°.
0.06Great Valley, Thursday, 13 August
Light rain. High 65°, low 51°.
0.08Great Valley, Friday, 14 August
Light rain. High 69°, low 47°.
0Great Valley, Saturday, 15 August
Clear. High 70°, low 50°.
0
Great Valley, Sunday, 16 August
Overcast. High 76°, low 51°.
0Great Valley, Monday, 17 August
Overcast. High 79°, low 55°.
0
Great Valley, Tuesday, 18 August
Partly cloudy. High 82°, low 56°.
0.2Great Valley, Wednesday, 19 August
Light rain. High 82°, low 61°.
0.13Great Valley, Thursday, 20 August
Light rain. High 67°, low 58°.
0Great Valley, Friday, 21 August
Clear. High 68°, low 49°.
0Great Valley, Saturday, 22 August
Overcast. High 75°, low 46°.
0.06Great Valley, Sunday, 23 August
Light rain. High 84°, low 61°.
0.1
Great Valley, Monday, 24 August
Climate normal for this date — 60-year average.
0.09Great Valley, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.1Great Valley, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.16Great Valley, Thursday, 27 August
Climate normal for this date — 60-year average.
0.18Great Valley, Friday, 28 August
Climate normal for this date — 60-year average.
0.15Great Valley, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Great Valley, Sunday, 30 August
Climate normal for this date — 60-year average.
0.13Great Valley, Monday, 31 August
Climate normal for this date — 60-year average.
0.09Great Valley, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.17Great Valley, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12Great Valley, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11Great Valley, Friday, 4 September
Climate normal for this date — 60-year average.
0.11Great Valley, Saturday, 5 September
Climate normal for this date — 60-year average.
0.09Great Valley, Sunday, 6 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 Great Valley, 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 Great Valley, 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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