Weather in Harristown, PA
Harristown, Tuesday, 27 October, 04:21
Partly cloudy. Feels like 49°. High 64°, low 43°.
Monthly outlook for Harristown, PA: average high 58.5°, average low 43°. That is 0.6° above the climate normal for October. Precipitation is expected on 2 days (about 2.8 inches), against a normal of 4 days and 1.8 inches. The warmest day looks like 30 October (71°), the coolest 9 November (29.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 27 October – 5 November | 63.4° | 58.9° | +2.5° |
| 6 November – 15 November | 50.3° | 53.9° | -2° |
| 16 November – 25 November | at normal | 50.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lancaster (12 mi).
0
Harristown, Wednesday, 28 October
Partly cloudy. High 64°, low 38°.
0Harristown, Thursday, 29 October
Partly cloudy. High 68°, low 47°.
0
Harristown, Friday, 30 October
Clear. High 71°, low 50°.
0Harristown, Saturday, 31 October
Partly cloudy. High 62°, low 44°.
0.03
Harristown, Sunday, 1 November
Light rain. High 65°, low 49°.
1.43Harristown, Monday, 2 November
Rain. High 62°, low 54°.
0.01Harristown, Tuesday, 3 November
Light rain. High 59°, low 46°.
0.01Harristown, Wednesday, 4 November
Light rain. High 55°, low 41°.
1.24Harristown, Thursday, 5 November
Rain. High 63°, low 55°.
0.03Harristown, Friday, 6 November
Light rain. High 51°, low 37°.
0
Harristown, Saturday, 7 November
Mostly clear. High 46°, low 33°.
0Harristown, Sunday, 8 November
Mostly clear. High 43°, low 32°.
0
Harristown, Monday, 9 November
Overcast. High 46°, low 29°.
0.03Harristown, Tuesday, 10 November
Light rain. High 58°, low 41°.
0Harristown, Wednesday, 11 November
Overcast. High 57°, low 48°.
0.18
Harristown, Thursday, 12 November
Climate normal for this date — 60-year average.
0.09Harristown, Friday, 13 November
Climate normal for this date — 60-year average.
0.07Harristown, Saturday, 14 November
Climate normal for this date — 60-year average.
0.1Harristown, Sunday, 15 November
Climate normal for this date — 60-year average.
0.14Harristown, Monday, 16 November
Climate normal for this date — 60-year average.
0.07Harristown, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.08Harristown, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.09Harristown, Thursday, 19 November
Climate normal for this date — 60-year average.
0.09Harristown, Friday, 20 November
Climate normal for this date — 60-year average.
0.09Harristown, Saturday, 21 November
Climate normal for this date — 60-year average.
0.12Harristown, Sunday, 22 November
Climate normal for this date — 60-year average.
0.06Harristown, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Harristown, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.12Harristown, Wednesday, 25 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 Harristown, 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 Harristown, 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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