Weather in Willow Grove, DE
Willow Grove, Sunday, 9 August, 06:00
Overcast. Feels like 76°. High 86°, low 74°.
Monthly outlook for Willow Grove, DE: average high 87.4°, average low 68.4°. That is 2.6° above the climate normal for August. Precipitation is expected on 3 days (about 0.5 inches), against a normal of 6 days and 2.4 inches. The warmest day looks like 24 August (98.7°), the coolest 16 August (55.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 83.4° | 83.5° | -0.1° |
| 19 August – 28 August | 94.2° | 82.1° | +6.7° |
| 29 August – 7 September | at normal | 81.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Marydel (7 mi).
0
Willow Grove, Monday, 10 August
Partly cloudy. High 89°, low 73°.
0.01
Willow Grove, Tuesday, 11 August
Light rain. High 90°, low 74°.
0Willow Grove, Wednesday, 12 August
Light rain. High 88°, low 74°.
0.05Willow Grove, Thursday, 13 August
Light rain. High 87°, low 71°.
0Willow Grove, Friday, 14 August
Overcast. High 79°, low 60°.
0
Willow Grove, Saturday, 15 August
Clear. High 77°, low 59°.
0Willow Grove, Sunday, 16 August
Overcast. High 81°, low 56°.
0.02Willow Grove, Monday, 17 August
Light rain. High 74°, low 61°.
0.01Willow Grove, Tuesday, 18 August
Light rain. High 82°, low 67°.
0
Willow Grove, Wednesday, 19 August
Mostly clear. High 86°, low 67°.
0Willow Grove, Thursday, 20 August
Mostly clear. High 90°, low 67°.
0.2Willow Grove, Friday, 21 August
Rain. High 96°, low 70°.
0.11Willow Grove, Saturday, 22 August
Light rain. High 96°, low 75°.
0Willow Grove, Sunday, 23 August
Clear. High 98°, low 73°.
0.03Willow Grove, Monday, 24 August
Light rain. High 99°, low 75°.
0.05Willow Grove, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.06Willow Grove, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.15
Willow Grove, Thursday, 27 August
Climate normal for this date — 60-year average.
0.2Willow Grove, Friday, 28 August
Climate normal for this date — 60-year average.
0.09Willow Grove, Saturday, 29 August
Climate normal for this date — 60-year average.
0.07Willow Grove, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08Willow Grove, Monday, 31 August
Climate normal for this date — 60-year average.
0.2Willow Grove, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Willow Grove, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.14Willow Grove, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Willow Grove, Friday, 4 September
Climate normal for this date — 60-year average.
0.09Willow Grove, Saturday, 5 September
Climate normal for this date — 60-year average.
0.18Willow Grove, Sunday, 6 September
Climate normal for this date — 60-year average.
0.08Willow Grove, 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 Willow Grove, DE 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 Willow Grove, DE 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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