Weather in Londonderry, PA
Londonderry, Friday, 13 November, 18:12
Overcast. Feels like 35°. High 45°, low 39°.
Monthly outlook for Londonderry, PA: average high 48.4°, average low 33.1°. That is 1.1° below the climate normal for November. Precipitation is expected on 1 day (about 0.2 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 20 November (59.5°), the coolest 24 November (21.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 13 November – 22 November | 52.2° | 50.8° | +0.8° |
| 23 November – 2 December | 41.9° | 48.5° | -3.6° |
| 3 December – 12 December | at normal | 44.3° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Lincoln University (5 mi).
0Londonderry, Saturday, 14 November
Overcast. High 48°, low 34°.
0Londonderry, Sunday, 15 November
Overcast. High 47°, low 36°.
0Londonderry, Monday, 16 November
Overcast. High 49°, low 34°.
0
Londonderry, Tuesday, 17 November
Clear. High 50°, low 32°.
0Londonderry, Wednesday, 18 November
Clear. High 55°, low 35°.
0
Londonderry, Thursday, 19 November
Partly cloudy. High 58°, low 37°.
0Londonderry, Friday, 20 November
Partly cloudy. High 60°, low 44°.
0Londonderry, Saturday, 21 November
Clear. High 56°, low 42°.
0Londonderry, Sunday, 22 November
Overcast. High 56°, low 38°.
0Londonderry, Monday, 23 November
Clear. High 39°, low 26°.
0Londonderry, Tuesday, 24 November
Clear. High 37°, low 21°.
0Londonderry, Wednesday, 25 November
Clear. High 39°, low 27°.
0Londonderry, Thursday, 26 November
Clear. High 42°, low 24°.
0
Londonderry, Friday, 27 November
Mostly clear. High 46°, low 26°.
0Londonderry, Saturday, 28 November
Clear. High 49°, low 32°.
0.15Londonderry, Sunday, 29 November
Climate normal for this date — 60-year average.
0.11Londonderry, Monday, 30 November
Climate normal for this date — 60-year average.
0.12Londonderry, Tuesday, 1 December
Climate normal for this date — 60-year average.
0.12Londonderry, Wednesday, 2 December
Climate normal for this date — 60-year average.
0.11Londonderry, Thursday, 3 December
Climate normal for this date — 60-year average.
0.1Londonderry, Friday, 4 December
Climate normal for this date — 60-year average.
0.15Londonderry, Saturday, 5 December
Climate normal for this date — 60-year average.
0.11
Londonderry, Sunday, 6 December
Climate normal for this date — 60-year average.
0.1Londonderry, Monday, 7 December
Climate normal for this date — 60-year average.
0.11Londonderry, Tuesday, 8 December
Climate normal for this date — 60-year average.
0.2Londonderry, Wednesday, 9 December
Climate normal for this date — 60-year average.
0.14Londonderry, Thursday, 10 December
Climate normal for this date — 60-year average.
0.2Londonderry, Friday, 11 December
Climate normal for this date — 60-year average.
0.1Londonderry, Saturday, 12 December
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 Londonderry, 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 Londonderry, 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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