Weather in West Chester, PA
West Chester, Sunday, 9 August, 05:29
Partly cloudy. Feels like 72°. High 85°, low 71°.
Monthly outlook for West Chester, PA: average high 84.9°, average low 67.1°. That is 1.4° above the climate normal for August. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 23 August (92.9°), the coolest 16 August (57.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.6° | 83.1° | -0.8° |
| 19 August – 28 August | 90.3° | 81.8° | +4.7° |
| 29 August – 7 September | at normal | 80.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Bellefonte (14 mi).
0
West Chester, Monday, 10 August
Partly cloudy. High 87°, low 71°.
0.07
West Chester, Tuesday, 11 August
Light rain. High 87°, low 70°.
0.01West Chester, Wednesday, 12 August
Light rain. High 83°, low 72°.
0.02West Chester, Thursday, 13 August
Light rain. High 82°, low 67°.
0
West Chester, Friday, 14 August
Overcast. High 75°, low 61°.
0
West Chester, Saturday, 15 August
Clear. High 77°, low 58°.
0West Chester, Sunday, 16 August
Overcast. High 78°, low 57°.
0West Chester, Monday, 17 August
Overcast. High 78°, low 61°.
0.01West Chester, Tuesday, 18 August
Light rain. High 85°, low 64°.
0West Chester, Wednesday, 19 August
Clear. High 88°, low 67°.
0West Chester, Thursday, 20 August
Partly cloudy. High 88°, low 67°.
0.2West Chester, Friday, 21 August
Rain. High 92°, low 70°.
0.08West Chester, Saturday, 22 August
Light rain. High 90°, low 72°.
0West Chester, Sunday, 23 August
Clear. High 93°, low 70°.
0.02West Chester, Monday, 24 August
Light rain. High 90°, low 76°.
0.06
West Chester, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06West Chester, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.17
West Chester, Thursday, 27 August
Climate normal for this date — 60-year average.
0.24West Chester, Friday, 28 August
Climate normal for this date — 60-year average.
0.12West Chester, Saturday, 29 August
Climate normal for this date — 60-year average.
0.08West Chester, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07West Chester, Monday, 31 August
Climate normal for this date — 60-year average.
0.14West Chester, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.11West Chester, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.13West Chester, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09West Chester, Friday, 4 September
Climate normal for this date — 60-year average.
0.11West Chester, Saturday, 5 September
Climate normal for this date — 60-year average.
0.23West Chester, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11West Chester, 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 West Chester, PA 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 West Chester, PA 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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