Weather in Upper Allen, PA
Upper Allen, Monday, 12 October, 17:32
Overcast. Feels like 69°. High 70°, low 56°.
Monthly outlook for Upper Allen, PA: average high 66.5°, average low 48.7°. That is 2.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.1 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 13 October (81.3°), the coolest 19 October (36.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 12 October – 21 October | 66.8° | 63.1° | +2° |
| 22 October – 31 October | 66° | 59.4° | +3.7° |
| 1 November – 10 November | at normal | 56.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Messiah College (2 mi).
0
Upper Allen, Tuesday, 13 October
Clear. High 81°, low 56°.
0
Upper Allen, Wednesday, 14 October
Mostly clear. High 80°, low 62°.
0
Upper Allen, Thursday, 15 October
Partly cloudy. High 64°, low 53°.
0.07
Upper Allen, Friday, 16 October
Light rain. High 75°, low 53°.
0Upper Allen, Saturday, 17 October
Partly cloudy. High 52°, low 42°.
0Upper Allen, Sunday, 18 October
Clear. High 54°, low 37°.
0Upper Allen, Monday, 19 October
Clear. High 60°, low 36°.
0Upper Allen, Tuesday, 20 October
Overcast. High 64°, low 45°.
0Upper Allen, Wednesday, 21 October
Clear. High 66°, low 48°.
0Upper Allen, Thursday, 22 October
Clear. High 67°, low 48°.
0Upper Allen, Friday, 23 October
Partly cloudy. High 68°, low 49°.
0Upper Allen, Saturday, 24 October
Overcast. High 73°, low 52°.
0.05Upper Allen, Sunday, 25 October
Light rain. High 64°, low 49°.
0Upper Allen, Monday, 26 October
Clear. High 63°, low 47°.
0Upper Allen, Tuesday, 27 October
Overcast. High 61°, low 45°.
0.1Upper Allen, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.2Upper Allen, Thursday, 29 October
Climate normal for this date — 60-year average.
0.11Upper Allen, Friday, 30 October
Climate normal for this date — 60-year average.
0.07Upper Allen, Saturday, 31 October
Climate normal for this date — 60-year average.
0.06Upper Allen, Sunday, 1 November
Climate normal for this date — 60-year average.
0.14Upper Allen, Monday, 2 November
Climate normal for this date — 60-year average.
0.07Upper Allen, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.08Upper Allen, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.11Upper Allen, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Upper Allen, Friday, 6 November
Climate normal for this date — 60-year average.
0.08Upper Allen, Saturday, 7 November
Climate normal for this date — 60-year average.
0.16Upper Allen, Sunday, 8 November
Climate normal for this date — 60-year average.
0.08Upper Allen, Monday, 9 November
Climate normal for this date — 60-year average.
0.17
Upper Allen, 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 Allen, 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 Allen, 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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