Weather in Pen Mar, PA
Pen Mar, Saturday, 8 August, 21:30
Overcast. Feels like 78°. High 84°, low 70°.
Monthly outlook for Pen Mar, PA: average high 82.3°, average low 63.1°. That is 0.6° below the climate normal for August. Precipitation is expected on 5 days (about 1.1 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 10 August (93.1°), the coolest 21 August (54.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 83.1° | 84.1° | -0.5° |
| 18 August – 27 August | 80.9° | 82.5° | -0.9° |
| 28 August – 6 September | at normal | 81.7° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Hagerstown (12 mi).
0
Pen Mar, Sunday, 9 August
Mostly clear. High 85°, low 71°.
0.29
Pen Mar, Monday, 10 August
Rain. High 93°, low 69°.
0.43Pen Mar, Tuesday, 11 August
Rain. High 84°, low 66°.
0.01Pen Mar, Wednesday, 12 August
Light rain. High 89°, low 67°.
0.01Pen Mar, Thursday, 13 August
Light rain. High 81°, low 63°.
0
Pen Mar, Friday, 14 August
Partly cloudy. High 78°, low 57°.
0
Pen Mar, Saturday, 15 August
Clear. High 80°, low 57°.
0Pen Mar, Sunday, 16 August
Overcast. High 82°, low 57°.
0.04Pen Mar, Monday, 17 August
Light rain. High 74°, low 65°.
0.07Pen Mar, Tuesday, 18 August
Light rain. High 74°, low 65°.
0.12Pen Mar, Wednesday, 19 August
Light rain. High 87°, low 64°.
0.16Pen Mar, Thursday, 20 August
Light rain. High 77°, low 65°.
0Pen Mar, Friday, 21 August
Clear. High 80°, low 55°.
0Pen Mar, Saturday, 22 August
Partly cloudy. High 82°, low 55°.
0.01Pen Mar, Sunday, 23 August
Light rain. High 86°, low 64°.
0.06Pen Mar, Monday, 24 August
Climate normal for this date — 60-year average.
0.05Pen Mar, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.05Pen Mar, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.13
Pen Mar, Thursday, 27 August
Climate normal for this date — 60-year average.
0.14Pen Mar, Friday, 28 August
Climate normal for this date — 60-year average.
0.06Pen Mar, Saturday, 29 August
Climate normal for this date — 60-year average.
0.04Pen Mar, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08Pen Mar, Monday, 31 August
Climate normal for this date — 60-year average.
0.11Pen Mar, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.08Pen Mar, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.05Pen Mar, Thursday, 3 September
Climate normal for this date — 60-year average.
0.1Pen Mar, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Pen Mar, Saturday, 5 September
Climate normal for this date — 60-year average.
0.21Pen Mar, Sunday, 6 September
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 Pen Mar, 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 Pen Mar, 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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