Weather in Londonderry, PA
Londonderry, Monday, 9 November, 07:20
Partly cloudy. Feels like 45°. High 59°, low 43°.
Monthly outlook for Londonderry, PA: average high 54.9°, average low 41.8°. That is 2° above the climate normal for November. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 22 November (64.6°), the coolest 18 November (34.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 November – 18 November | 52.3° | 52.5° | -0.1° |
| 19 November – 28 November | 59.3° | 49.8° | +5.3° |
| 29 November – 8 December | at normal | 45.6° | — |
November records over 66 years
Climate normals and records are computed from the nearest reference point — Lincoln University (5 mi).
0
Londonderry, Tuesday, 10 November
Mostly clear. High 62°, low 40°.
0Londonderry, Wednesday, 11 November
Mostly clear. High 61°, low 41°.
0.17
Londonderry, Thursday, 12 November
Rain. High 59°, low 44°.
0.18Londonderry, Friday, 13 November
Light rain. High 47°, low 41°.
0
Londonderry, Saturday, 14 November
Overcast. High 46°, low 36°.
0Londonderry, Sunday, 15 November
Overcast. High 46°, low 40°.
0
Londonderry, Monday, 16 November
Clear. High 47°, low 40°.
0Londonderry, Tuesday, 17 November
Overcast. High 46°, low 36°.
0Londonderry, Wednesday, 18 November
Partly cloudy. High 51°, low 35°.
0Londonderry, Thursday, 19 November
Partly cloudy. High 58°, low 40°.
0Londonderry, Friday, 20 November
Mostly clear. High 58°, low 43°.
0Londonderry, Saturday, 21 November
Overcast. High 60°, low 43°.
0Londonderry, Sunday, 22 November
Overcast. High 65°, low 52°.
0.82Londonderry, Monday, 23 November
Rain. High 64°, low 52°.
0.04Londonderry, Tuesday, 24 November
Light rain. High 51°, low 43°.
0.12
Londonderry, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.15Londonderry, Thursday, 26 November
Climate normal for this date — 60-year average.
0.1Londonderry, Friday, 27 November
Climate normal for this date — 60-year average.
0.17Londonderry, Saturday, 28 November
Climate normal for this date — 60-year average.
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.
0.11Londonderry, 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.
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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