Weather in Mercersburg, PA
Mercersburg, Thursday, 29 October, 07:00
Partly cloudy. Feels like 44°. High 70°, low 45°.
Monthly outlook for Mercersburg, PA: average high 60.9°, average low 45.4°. That is 2.5° above the climate normal for October. Precipitation is expected on 3 days (about 1.8 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 29 October (70.4°), the coolest 8 November (35.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 29 October – 7 November | 64.4° | 58° | +3.6° |
| 8 November – 17 November | 55.1° | 52.8° | +1.3° |
| 18 November – 27 November | at normal | 49.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Warren (7 mi).
0
Mercersburg, Friday, 30 October
Clear. High 68°, low 50°.
0
Mercersburg, Saturday, 31 October
Overcast. High 61°, low 43°.
0Mercersburg, Sunday, 1 November
Overcast. High 63°, low 48°.
0
Mercersburg, Monday, 2 November
Mostly clear. High 67°, low 46°.
0Mercersburg, Tuesday, 3 November
Overcast. High 69°, low 48°.
0
Mercersburg, Wednesday, 4 November
Partly cloudy. High 69°, low 50°.
1.51
Mercersburg, Thursday, 5 November
Heavy rain. High 64°, low 58°.
0Mercersburg, Friday, 6 November
Clear. High 56°, low 42°.
0Mercersburg, Saturday, 7 November
Clear. High 55°, low 37°.
0Mercersburg, Sunday, 8 November
Clear. High 55°, low 36°.
0Mercersburg, Monday, 9 November
Clear. High 56°, low 37°.
0.16Mercersburg, Tuesday, 10 November
Rain. High 48°, low 42°.
0Mercersburg, Wednesday, 11 November
Overcast. High 57°, low 47°.
0Mercersburg, Thursday, 12 November
Overcast. High 58°, low 50°.
0.13Mercersburg, Friday, 13 November
Light rain. High 56°, low 49°.
0.07Mercersburg, Saturday, 14 November
Climate normal for this date — 60-year average.
0.11
Mercersburg, Sunday, 15 November
Climate normal for this date — 60-year average.
0.12Mercersburg, Monday, 16 November
Climate normal for this date — 60-year average.
0.08Mercersburg, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Mercersburg, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.09Mercersburg, Thursday, 19 November
Climate normal for this date — 60-year average.
0.07Mercersburg, Friday, 20 November
Climate normal for this date — 60-year average.
0.11Mercersburg, Saturday, 21 November
Climate normal for this date — 60-year average.
0.1Mercersburg, Sunday, 22 November
Climate normal for this date — 60-year average.
0.06Mercersburg, Monday, 23 November
Climate normal for this date — 60-year average.
0.13Mercersburg, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.09Mercersburg, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.17Mercersburg, Thursday, 26 November
Climate normal for this date — 60-year average.
0.13Mercersburg, Friday, 27 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 Mercersburg, 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 Mercersburg, 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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