Weather in Marsh Run, PA
Marsh Run, Sunday, 9 August, 02:12
Partly cloudy. Feels like 74°. High 87°, low 72°.
Monthly outlook for Marsh Run, PA: average high 81.8°, average low 63.7°. That is 0.2° below the climate normal for August. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 10 August (89.4°), the coolest 22 August (52.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 81.6° | 82.8° | -0.7° |
| 19 August – 28 August | 82° | 81.6° | +0.3° |
| 29 August – 7 September | at normal | 80.1° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Messiah College (9 mi).
0.26
Marsh Run, Monday, 10 August
Rain. High 89°, low 71°.
0.32Marsh Run, Tuesday, 11 August
Rain. High 88°, low 68°.
0.01Marsh Run, Wednesday, 12 August
Light rain. High 84°, low 69°.
0.01Marsh Run, Thursday, 13 August
Light rain. High 82°, low 65°.
0
Marsh Run, Friday, 14 August
Clear. High 81°, low 57°.
0Marsh Run, Saturday, 15 August
Clear. High 81°, low 58°.
0
Marsh Run, Sunday, 16 August
Overcast. High 81°, low 57°.
0.25Marsh Run, Monday, 17 August
Rain. High 74°, low 65°.
0.02Marsh Run, Tuesday, 18 August
Light rain. High 69°, low 65°.
0.25Marsh Run, Wednesday, 19 August
Rain. High 83°, low 67°.
0.52Marsh Run, Thursday, 20 August
Rain. High 77°, low 65°.
0Marsh Run, Friday, 21 August
Clear. High 80°, low 58°.
0
Marsh Run, Saturday, 22 August
Partly cloudy. High 79°, low 53°.
0.01Marsh Run, Sunday, 23 August
Light rain. High 87°, low 62°.
0Marsh Run, Monday, 24 August
Clear. High 87°, low 68°.
0.05Marsh Run, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.05Marsh Run, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.15
Marsh Run, Thursday, 27 August
Climate normal for this date — 60-year average.
0.17Marsh Run, Friday, 28 August
Climate normal for this date — 60-year average.
0.09Marsh Run, Saturday, 29 August
Climate normal for this date — 60-year average.
0.06Marsh Run, Sunday, 30 August
Climate normal for this date — 60-year average.
0.08Marsh Run, Monday, 31 August
Climate normal for this date — 60-year average.
0.12Marsh Run, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Marsh Run, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.06Marsh Run, Thursday, 3 September
Climate normal for this date — 60-year average.
0.11Marsh Run, Friday, 4 September
Climate normal for this date — 60-year average.
0.07Marsh Run, Saturday, 5 September
Climate normal for this date — 60-year average.
0.18Marsh Run, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Marsh Run, Monday, 7 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 Marsh Run, 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 Marsh Run, 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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