Weather in Upper Darby, PA
Upper Darby, Monday, 12 October, 05:28
Overcast. Feels like 54°. High 73°, low 54°.
Monthly outlook for Upper Darby, PA: average high 63.6°, average low 49.3°. That is 0.1° above the climate normal for October. Precipitation is expected on 3 days (about 0.7 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 14 October (77.8°), the coolest 18 October (37.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 66.3° | 64.4° | +1.1° |
| 22 October – 31 October | 59.1° | 60.8° | -1° |
| 1 November – 10 November | at normal | 58.1° | — |
October records over 66 years
0
Upper Darby, Tuesday, 13 October
Clear. High 76°, low 54°.
0Upper Darby, Wednesday, 14 October
Overcast. High 78°, low 66°.
0
Upper Darby, Thursday, 15 October
Mostly clear. High 64°, low 54°.
0.34
Upper Darby, Friday, 16 October
Rain. High 73°, low 54°.
0
Upper Darby, Saturday, 17 October
Partly cloudy. High 54°, low 43°.
0Upper Darby, Sunday, 18 October
Clear. High 53°, low 38°.
0Upper Darby, Monday, 19 October
Clear. High 63°, low 43°.
0Upper Darby, Tuesday, 20 October
Overcast. High 66°, low 50°.
0Upper Darby, Wednesday, 21 October
Clear. High 65°, low 53°.
0Upper Darby, Thursday, 22 October
Clear. High 63°, low 49°.
0Upper Darby, Friday, 23 October
Overcast. High 66°, low 49°.
0.02Upper Darby, Saturday, 24 October
Light rain. High 56°, low 45°.
0Upper Darby, Sunday, 25 October
Clear. High 54°, low 40°.
0.05Upper Darby, Monday, 26 October
Light rain. High 56°, low 50°.
0Upper Darby, Tuesday, 27 October
Clear. High 59°, low 46°.
0.13Upper Darby, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.24Upper Darby, Thursday, 29 October
Climate normal for this date — 60-year average.
0.09Upper Darby, Friday, 30 October
Climate normal for this date — 60-year average.
0.06Upper Darby, Saturday, 31 October
Climate normal for this date — 60-year average.
0.08Upper Darby, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Upper Darby, Monday, 2 November
Climate normal for this date — 60-year average.
0.08Upper Darby, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.08Upper Darby, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.12Upper Darby, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08Upper Darby, Friday, 6 November
Climate normal for this date — 60-year average.
0.09Upper Darby, Saturday, 7 November
Climate normal for this date — 60-year average.
0.11Upper Darby, Sunday, 8 November
Climate normal for this date — 60-year average.
0.09Upper Darby, Monday, 9 November
Climate normal for this date — 60-year average.
0.16
Upper Darby, Tuesday, 10 November
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 Upper Darby, 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 Upper Darby, 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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