Weather in Derry, PA
Derry, Sunday, 11 October, 09:45
Heavy rain. Feels like 55°. High 63°, low 55°.
Monthly outlook for Derry, PA: average high 61.4°, average low 44.5°. That is 0.2° below the climate normal for October. Precipitation is expected on 4 days (about 2.3 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 13 October (77.3°), the coolest 19 October (28.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 11 October – 20 October | 63.4° | 62.9° | +0.3° |
| 21 October – 30 October | 58.2° | 59.3° | -0.6° |
| 31 October – 9 November | at normal | 56.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — East Hanover (8 mi).
0.06Derry, Monday, 12 October
Light rain. High 76°, low 55°.
0
Derry, Tuesday, 13 October
Clear. High 77°, low 55°.
0.02Derry, Wednesday, 14 October
Light rain. High 76°, low 63°.
0
Derry, Thursday, 15 October
Overcast. High 65°, low 55°.
0.62Derry, Friday, 16 October
Rain. High 68°, low 54°.
0Derry, Saturday, 17 October
Overcast. High 49°, low 34°.
0Derry, Sunday, 18 October
Clear. High 46°, low 32°.
0Derry, Monday, 19 October
Overcast. High 53°, low 29°.
0Derry, Tuesday, 20 October
Clear. High 61°, low 37°.
0Derry, Wednesday, 21 October
Clear. High 62°, low 42°.
0Derry, Thursday, 22 October
Overcast. High 58°, low 41°.
0Derry, Friday, 23 October
Clear. High 58°, low 40°.
0Derry, Saturday, 24 October
Overcast. High 61°, low 42°.
0Derry, Sunday, 25 October
Clear. High 59°, low 42°.
0.19Derry, Monday, 26 October
Light rain. High 51°, low 38°.
0.19
Derry, 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.
0.09Derry, Monday, 9 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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