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Waterloo, PA Weather Forecast
Waterloo, PA Weather Forecast Dated: 347 PM Thu Sep 17 2026
Expect a cool pattern with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.
Thursday, September 17, 2026
Mid-Morning
66°F 19°C
Scattered Showers
Mid-Afternoon
81°F 27°C
Light Showers
Early-Evening
78°F 26°C
Light Showers
Warm and summery around 81°F 27°C (feels like 84°F 29°C), periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. A stray shower or storm late in the day.
Friday, September 18, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
73°F 23°C
Overcast
Early-Evening
70°F 21°C
Scattered Showers
Comfortable with temperatures reaching 73°F 23°C, scattered downpours possible, with lower humidity and steady pressure.
Saturday, September 19, 2026
Mid-Morning
54°F 12°C
Overcast
Mid-Afternoon
67°F 20°C
Sunny
Early-Evening
66°F 19°C
Overcast
Comfortable at 67°F 20°C, overcast in the morning, sunny in the afternoon, and overcast this evening, with steady humidity and barometric pressure falling. Winds turning from the ENE to the SE at 9 mph 14 km/h. Gusts up to 20 mph 31 km/h.
Sunday, September 20, 2026
Mid-Morning
61°F 16°C
Fog
Mid-Afternoon
77°F 25°C
Scattered Showers
Early-Evening
71°F 22°C
Light Showers
Mild temperatures up to 77°F 25°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds switching from the SSE to the WNW at 3 mph 4 km/h.
Monday, September 21, 2026
Mid-Morning
52°F 11°C
Overcast
Mid-Afternoon
55°F 13°C
Fog
Early-Evening
54°F 12°C
Fog
Brisk around 55°F 13°C, overcast throughout the day, with increasing humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
55°F 13°C
Light Showers
Mid-Afternoon
56°F 14°C
Light Showers
Early-Evening
56°F 13°C
Light Showers
Cool and brisk at 56°F 14°C, on-and-off showers throughout the day, with steady humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
56°F 13°C
Fog
Mid-Afternoon
62°F 17°C
Cloudy
Early-Evening
61°F 16°C
Fog
Comfortable at 62°F 17°C, overcast throughout the day, with steady humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
58°F 15°C
Scattered Showers
Mid-Afternoon
65°F 18°C
Light Showers
Early-Evening
61°F 16°C
Light Showers
Cool with a high near 65°F 18°C, scattered downpours possible, with steady humidity and barometric pressure falling. Winds moving from the SSE to the WNW at 9 mph 15 km/h. Gusts up to 28 mph 45 km/h.
Friday, September 25, 2026
Mid-Morning
51°F 10°C
Scattered Showers
Mid-Afternoon
58°F 14°C
Sunny
Early-Evening
53°F 12°C
Sunny
Refreshing around 58°F 14°C, locally heavy downpours at times, with steady humidity and barometric pressure rising. Winds swinging from the W to the WNW at 8 mph 14 km/h. Gusts up to 20 mph 33 km/h.
Saturday, September 26, 2026
Mid-Morning
49°F 9°C
Sunny
Mid-Afternoon
60°F 15°C
Sunny
Early-Evening
55°F 13°C
Sunny
Mildly cool near 60°F 15°C, sunny throughout the day, with lower humidity and steady pressure. Winds blowing from the NW at 11 mph 17 km/h.
Sunday, September 27, 2026
Mid-Morning
52°F 11°C
Sunny
Mid-Afternoon
66°F 19°C
Sunny
Early-Evening
61°F 16°C
Sunny
Comfortable at 66°F 19°C, sunny throughout the day, with steady humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
56°F 14°C
Sunny
Mid-Afternoon
70°F 21°C
Sunny
Early-Evening
64°F 18°C
Overcast
Comfortable with temperatures reaching 70°F 21°C, sunny through the afternoon, turning cloudy this evening, with steady humidity and barometric pressure falling.
Tuesday, September 29, 2026
Mid-Morning
58°F 15°C
Sunny
Mid-Afternoon
73°F 23°C
Sunny
Early-Evening
67°F 19°C
Sunny
Enjoyable around 73°F 23°C, sunny throughout the day, with lower humidity and steady pressure.
Wednesday, September 30, 2026
Mid-Morning
62°F 17°C
Partly Cloudy
Mid-Afternoon
72°F 22°C
Partly Cloudy
Early-Evening
65°F 18°C
Overcast
Mild temperatures up to 72°F 22°C, cloudy through the afternoon, turning overcast this evening, with steady humidity and steady pressure.
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