Weather in Derry, PA
Derry, Saturday, 10 October, 16:26
Overcast. Feels like 68°. High 69°, low 46°.
Monthly outlook for Derry, PA: average high 62°, average low 44.9°. That is 0.1° below the climate normal for October. Precipitation is expected on 5 days (about 2.5 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 13 October (77.5°), the coolest 20 October (30.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 65° | 63.3° | +1° |
| 20 October – 29 October | 57.1° | 59.6° | -1.4° |
| 30 October – 8 November | at normal | 56.7° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — East Hanover (8 mi).
1.64
Derry, Sunday, 11 October
Heavy rain. High 64°, low 51°.
0.14Derry, Monday, 12 October
Rain. High 72°, low 52°.
0
Derry, Tuesday, 13 October
Clear. High 77°, low 55°.
0.07Derry, Wednesday, 14 October
Light rain. High 77°, low 64°.
0Derry, Thursday, 15 October
Overcast. High 64°, low 50°.
0.32Derry, Friday, 16 October
Rain. High 68°, low 51°.
0.3Derry, Saturday, 17 October
Rain. High 61°, low 46°.
0Derry, Sunday, 18 October
Clear. High 49°, low 36°.
0Derry, Monday, 19 October
Clear. High 48°, low 33°.
0Derry, Tuesday, 20 October
Overcast. High 51°, low 30°.
0Derry, Wednesday, 21 October
Clear. High 54°, low 34°.
0Derry, Thursday, 22 October
Light rain. High 61°, low 46°.
0Derry, Friday, 23 October
Clear. High 65°, low 44°.
0Derry, Saturday, 24 October
Clear. High 56°, low 41°.
0Derry, Sunday, 25 October
Overcast. High 56°, low 37°.
0.1
Derry, Monday, 26 October
Climate normal for this date — 60-year average.
0.19Derry, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.11Derry, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.17Derry, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Derry, Friday, 30 October
Climate normal for this date — 60-year average.
0.07Derry, Saturday, 31 October
Climate normal for this date — 60-year average.
0.07Derry, Sunday, 1 November
Climate normal for this date — 60-year average.
0.15Derry, Monday, 2 November
Climate normal for this date — 60-year average.
0.08Derry, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.08Derry, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Derry, Thursday, 5 November
Climate normal for this date — 60-year average.
0.07
Derry, Friday, 6 November
Climate normal for this date — 60-year average.
0.07Derry, Saturday, 7 November
Climate normal for this date — 60-year average.
0.18Derry, Sunday, 8 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 Derry, 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 Derry, 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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