Weather in Mercersburg, PA
Mercersburg, Friday, 30 October, 16:21
Clear. Feels like 65°. High 69°, low 46°.
Monthly outlook for Mercersburg, PA: average high 57.1°, average low 42.2°. That is 0.6° above the climate normal for October. Precipitation is expected on 5 days (about 2.1 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 4 November (69.9°), the coolest 12 November (31.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 63.1° | 57.7° | +3° |
| 9 November – 18 November | 47° | 52.3° | -2.9° |
| 19 November – 28 November | at normal | 49.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Warren (7 mi).
0
Mercersburg, Saturday, 31 October
Overcast. High 62°, low 39°.
0Mercersburg, Sunday, 1 November
Overcast. High 63°, low 41°.
0Mercersburg, Monday, 2 November
Overcast. High 69°, low 46°.
0
Mercersburg, Tuesday, 3 November
Partly cloudy. High 69°, low 48°.
0Mercersburg, Wednesday, 4 November
Overcast. High 70°, low 51°.
1.06
Mercersburg, Thursday, 5 November
Rain. High 62°, low 59°.
0.25Mercersburg, Friday, 6 November
Light rain. High 62°, low 57°.
0Mercersburg, Saturday, 7 November
Overcast. High 56°, low 41°.
0Mercersburg, Sunday, 8 November
Overcast. High 49°, low 37°.
0Mercersburg, Monday, 9 November
Overcast. High 49°, low 32°.
0.32Mercersburg, Tuesday, 10 November
Light rain. High 40°, low 37°.
0.31Mercersburg, Wednesday, 11 November
Rain. High 41°, low 39°.
0Mercersburg, Thursday, 12 November
Clear. High 48°, low 31°.
0Mercersburg, Friday, 13 November
Clear. High 53°, low 32°.
0.16Mercersburg, Saturday, 14 November
Light rain. High 51°, low 39°.
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.
0.2Mercersburg, Saturday, 28 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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