Waterloo, PA Weather Forecast

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Waterloo, PA Weather Forecast

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Waterloo PA weather  - Hazy - 75°F
Hazy
75°F
Updated 3:55 pm
Feels Like 69°F
Humidity 64%
Wind N 0 mph
Barometer  30.12 in
Dew Point 62°F
Waterloo PA weather  - Hazy - 24°C
Hazy
24°C
Updated 3:55 pm
Feels Like 21°C
Humidity 64%
Wind N 0 km/h
Barometer  101.9 kPa
Dew Point 17°C

Waterloo Weather Forecast

THIS AFTERNOON TONIGHT SATURDAY SATURDAY NIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT
Waterloo, PA Weather - This Afternoon Mostly Sunny Waterloo, PA Weather - Tonight Patchy Fog Waterloo, PA Weather - Saturday Patchy Fog Waterloo, PA Weather - Saturday Night Showers Likely Waterloo, PA Weather - Sunday Showers Waterloo, PA Weather - Sunday Night Showers Waterloo, PA Weather - Monday Chance Of Showers Waterloo, PA Weather - Monday Night Showers Likely Waterloo, PA Weather - Tuesday Showers Waterloo, PA Weather - Tuesday Night Showers Likely Waterloo, PA Weather - Wednesday Chance Of Showers Waterloo, PA Weather - Wednesday Night Chance Of Showers
Mostly Sunny Patchy Fog Patchy Fog Showers Likely Showers Showers Chance of Showers Showers Likely Showers Showers Likely Chance of Showers Chance of Showers
Hi: 79°FHi: 26°C
Lo: 51°FLo: 11°C Hi: 71°FHi: 22°C
Lo: 61°FLo: 16°C Hi: 71°FHi: 22°C
Lo: 59°FLo: 15°C Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C Hi: 60°FHi: 16°C
Lo: 49°FLo: 9°C Hi: 59°FHi: 15°C
Lo: 49°FLo: 9°C
POP: 70% POP: 100% POP: 100% POP: 30% POP: 70% POP: 70% POP: 70% POP: 50% POP: 50%
POP = Probability of Precipitation.
Weather Outlook Updated: 300 PM EDT Fri Sep 18 2026 Waterloo, PA Weather - WeatherWorld.com

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Waterloo Forecast Discussion

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Issued: 129 PM 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...