Marsh Run, PA Weather Forecast

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Marsh Run, PA Weather Forecast

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Marsh Run PA weather  - Mist - 70°F
Mist
70°F
Updated 6:53 am
Feels Like 65°F
Humidity 100%
Wind W 3 mph
Barometer  30.07 in
Dew Point 70°F
Marsh Run PA weather  - Mist - 21°C
Mist
21°C
Updated 6:53 am
Feels Like 18°C
Humidity 100%
Wind W 5 km/h
Barometer  101.8 kPa
Dew Point 21°C

Marsh Run Weather Forecast

TODAY TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
Marsh Run, PA Weather - Today Mostly Sunny Marsh Run, PA Weather - Tonight Partly Cloudy Marsh Run, PA Weather - Saturday Partly Sunny Marsh Run, PA Weather - Saturday Night Chance Of Showers Marsh Run, PA Weather - Sunday Chance Of Showers Marsh Run, PA Weather - Sunday Night Showers Marsh Run, PA Weather - Monday Chance Of Showers Marsh Run, PA Weather - Monday Night Showers Likely Marsh Run, PA Weather - Tuesday Showers Marsh Run, PA Weather - Tuesday Night Showers Likely Marsh Run, PA Weather - Wednesday Chance Of Showers Marsh Run, PA Weather - Wednesday Night Chance Of Showers
Mostly Sunny Partly Cloudy Partly Sunny Chance of Showers Chance of Showers Showers Chance of Showers Showers Likely Showers Showers Likely Chance of Showers Chance of Showers
Hi: 81°FHi: 27°C
Lo: 55°FLo: 13°C Hi: 75°FHi: 24°C
Lo: 61°FLo: 16°C Hi: 75°FHi: 24°C
Lo: 61°FLo: 16°C Hi: 70°FHi: 21°C
Lo: 59°FLo: 15°C Hi: 61°FHi: 16°C
Lo: 51°FLo: 11°C Hi: 61°FHi: 16°C
Lo: 51°FLo: 11°C
POP: 50% POP: 90% POP: 90% POP: 50% POP: 60% POP: 60% POP: 60% POP: 50% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 600 AM EDT Fri Sep 18 2026 Marsh Run, PA Weather - WeatherWorld.com

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Marsh Run Forecast Discussion

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Issued: 606 AM EDT Fri Sep 18 2026

Key Messages

1) Becoming noticeably less humid through the day today with cooler air settling in for tonight.

2) Rain returning by Sunday, heavy at times.

3) Rainy pattern continues into much of next week.


Discussion

... KEY MESSAGE 1: Becoming noticeably less humid through the day today with cooler air settling in for tonight.

With the cold front now pushing into the southern tier, high clouds are peeling off to the south. However, moisture remains trapped in the boundary layer resulting in widesprea...