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Johnstown, PA Weather Forecast
Johnstown, PA Weather Forecast Dated: 926 PM Fri Sep 11 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.
Friday, September 11, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
72°F 22°C
Overcast
Warm and summery near 82°F 28°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
62°F 17°C
Light Showers
Mid-Afternoon
63°F 17°C
Light Showers
Early-Evening
66°F 19°C
Light Showers
Mildly cool near 63°F 17°C, persistent showers off and on through the day, with increasing humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
63°F 17°C
Light Fog
Mid-Afternoon
76°F 25°C
Scattered Showers
Early-Evening
72°F 22°C
Scattered Showers
Enjoyable around 76°F 25°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds turning from the W to the SW at 5 mph 8 km/h.
Monday, September 14, 2026
Mid-Morning
61°F 16°C
Fog
Mid-Afternoon
71°F 22°C
Cloudy
Early-Evening
66°F 19°C
Overcast
Mild temperatures up to 71°F 22°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
63°F 17°C
Overcast
Refreshing around 66°F 19°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the SE to the SSE at 6 mph 10 km/h.
Wednesday, September 16, 2026
Mid-Morning
67°F 20°C
Sunny
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
80°F 27°C
Sunny
Warm and summery near 83°F 28°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds moving from the SSE to the SSW at 6 mph 9 km/h.
Thursday, September 17, 2026
Mid-Morning
72°F 22°C
Light Showers
Mid-Afternoon
71°F 22°C
Light Showers
Early-Evening
64°F 18°C
Fog
Comfortable with temperatures reaching 71°F 22°C, intermittent showers through midday, easing by evening, with steady humidity and barometric pressure falling. Winds swinging from the SW to the WNW at 7 mph 11 km/h. Gusts up to 20 mph 32 km/h.
Friday, September 18, 2026
Mid-Morning
48°F 9°C
Scattered Showers
Mid-Afternoon
61°F 16°C
Partly Cloudy
Early-Evening
58°F 15°C
Sunny
Cool with a high near 61°F 16°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the NNW to the WSW at 5 mph 8 km/h.
Saturday, September 19, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
60°F 16°C
Cloudy
Refreshing around 64°F 18°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
Sunday, September 20, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
64°F 18°C
Sunny
Early-Evening
60°F 16°C
Sunny
Mildly cool near 64°F 18°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
57°F 14°C
Overcast
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
60°F 15°C
Overcast
Comfortable at 63°F 17°C, overcast throughout the day, with steady humidity and steady pressure. Winds E at 8 mph 13 km/h.
Tuesday, September 22, 2026
Mid-Morning
47°F 8°C
Light Showers
Mid-Afternoon
47°F 8°C
Light Fog
Early-Evening
47°F 8°C
Fog
Crisp with a high near 47°F 8°C, morning showers, giving way to clearing skies, with steady humidity and steady pressure.
Wednesday, September 23, 2026
Mid-Morning
47°F 8°C
Scattered Showers
Mid-Afternoon
57°F 14°C
Scattered Showers
Early-Evening
60°F 16°C
Overcast
Brisk around 57°F 14°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds switching from the WNW to the NW at 6 mph 9 km/h.
Thursday, September 24, 2026
Mid-Morning
57°F 14°C
Sunny
Mid-Afternoon
69°F 20°C
Sunny
Early-Evening
66°F 19°C
Sunny
Mild temperatures up to 69°F 20°C, sunny throughout the day, with steady humidity and steady pressure.
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