Weather in Philadelphia, PA
Philadelphia, Sunday, 9 August, 03:42
Clear. Feels like 75°. High 88°, low 73°.
Monthly outlook for Philadelphia, PA: average high 89.2°, average low 71.8°. That is 3.5° above the climate normal for August. Precipitation is expected on 5 days (about 0.3 inches), against a normal of 6 days and 2.1 inches. The warmest day looks like 23 August (98.3°), the coolest 16 August (63.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 85.7° | 83.7° | +1.1° |
| 19 August – 28 August | 95° | 82.2° | +7.1° |
| 29 August – 7 September | at normal | 80.9° | — |
August records over 66 years
0.01
Philadelphia, Monday, 10 August
Light rain. High 90°, low 73°.
0.07Philadelphia, Tuesday, 11 August
Rain. High 91°, low 74°.
0.04Philadelphia, Wednesday, 12 August
Light rain. High 86°, low 75°.
0.04Philadelphia, Thursday, 13 August
Light rain. High 86°, low 73°.
0
Philadelphia, Friday, 14 August
Overcast. High 80°, low 65°.
0
Philadelphia, Saturday, 15 August
Clear. High 80°, low 64°.
0Philadelphia, Sunday, 16 August
Overcast. High 82°, low 63°.
0
Philadelphia, Monday, 17 August
Partly cloudy. High 85°, low 69°.
0
Philadelphia, Tuesday, 18 August
Mostly clear. High 89°, low 67°.
0Philadelphia, Wednesday, 19 August
Clear. High 92°, low 74°.
0Philadelphia, Thursday, 20 August
Mostly clear. High 94°, low 72°.
0.08Philadelphia, Friday, 21 August
Light rain. High 97°, low 75°.
0.07Philadelphia, Saturday, 22 August
Light rain. High 95°, low 75°.
0Philadelphia, Sunday, 23 August
Clear. High 98°, low 76°.
0.04Philadelphia, Monday, 24 August
Light rain. High 94°, low 81°.
0.06Philadelphia, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.05Philadelphia, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.18
Philadelphia, Thursday, 27 August
Climate normal for this date — 60-year average.
0.23Philadelphia, Friday, 28 August
Climate normal for this date — 60-year average.
0.12Philadelphia, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Philadelphia, Sunday, 30 August
Climate normal for this date — 60-year average.
0.07Philadelphia, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Philadelphia, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.11Philadelphia, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.15Philadelphia, Thursday, 3 September
Climate normal for this date — 60-year average.
0.09Philadelphia, Friday, 4 September
Climate normal for this date — 60-year average.
0.08Philadelphia, Saturday, 5 September
Climate normal for this date — 60-year average.
0.2Philadelphia, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Philadelphia, 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 Philadelphia, 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 Philadelphia, 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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