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St. Clair, OH 14 Day Weather - WeatherWorld.com
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St. Clair, OH Weather Forecast
St. Clair, OH Weather Forecast Dated: 454 PM Thu Sep 03 2026
Expect a very warm period with plenty of sunshine and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate. Isolated storms at times.
Thursday, September 3, 2026
Mid-Morning
80°F 27°C
Sunny
Mid-Afternoon
101°F 39°C
Sunny
Early-Evening
91°F 33°C
Sunny
Scorching heat reaching 101°F 39°C, feeling like 111°F 44°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the WSW to the NE at 6 mph 9 km/h.
Friday, September 4, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
97°F 36°C
Sunny
Early-Evening
92°F 33°C
Sunny
Hot and sweltering around 97°F 36°C (heat index 101°F 38°C), sunny throughout the day, with lower humidity and steady pressure. Winds switching from the WSW to the WNW at 6 mph 10 km/h.
Saturday, September 5, 2026
Mid-Morning
70°F 21°C
Light Showers
Mid-Afternoon
83°F 28°C
Partly Cloudy
Early-Evening
80°F 27°C
Sunny
Very warm near 83°F 28°C, though humidity makes it feel like 86°F 30°C, morning showers, giving way to clearing skies, with lower humidity and barometric pressure falling. Winds NNW at 3 mph 5 km/h.
Sunday, September 6, 2026
Mid-Morning
67°F 19°C
Overcast
Mid-Afternoon
78°F 26°C
Sunny
Early-Evening
73°F 23°C
Sunny
Mild temperatures up to 78°F 26°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the NE to the NNE at 9 mph 14 km/h.
Monday, September 7, 2026
Mid-Morning
61°F 16°C
Overcast
Mid-Afternoon
80°F 27°C
Overcast
Early-Evening
75°F 24°C
Cloudy
Very warm with a high of 80°F 27°C, overcast through the afternoon, turning cloudy this evening, with lower humidity and steady pressure.
Tuesday, September 8, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
87°F 30°C
Overcast
Early-Evening
82°F 27°C
Sunny
Warm and summery near 87°F 30°C, overcast through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure.
Wednesday, September 9, 2026
Mid-Morning
78°F 26°C
Sunny
Mid-Afternoon
94°F 34°C
Sunny
Early-Evening
90°F 32°C
Sunny
Sizzling hot near 94°F 34°C with a heat index reaching 97°F 36°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds shifting from the SSW to the NW at 7 mph 11 km/h.
Thursday, September 10, 2026
Mid-Morning
73°F 23°C
Partly Cloudy
Mid-Afternoon
85°F 29°C
Sunny
Early-Evening
81°F 27°C
Scattered Showers
Quite warm around 85°F 29°C, scattered downpours possible, with lower humidity and steady pressure.
Friday, September 11, 2026
Mid-Morning
70°F 21°C
Scattered Showers
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
77°F 25°C
Sunny
Warm temperatures up to 84°F 29°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds turning from the E to the NE at 9 mph 14 km/h.
Saturday, September 12, 2026
Mid-Morning
63°F 17°C
Scattered Showers
Mid-Afternoon
85°F 30°C
Sunny
Early-Evening
81°F 27°C
Sunny
Very warm with a high of 85°F 30°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure.
Sunday, September 13, 2026
Mid-Morning
76°F 24°C
Sunny
Mid-Afternoon
97°F 36°C
Sunny
Early-Evening
90°F 32°C
Nearby Thunderstorms
Hot and sweltering around 97°F 36°C (heat index 100°F 38°C), locally heavy thunderstorms at times, with steady humidity and steady pressure.
Monday, September 14, 2026
Mid-Morning
82°F 28°C
Cloudy
Mid-Afternoon
83°F 28°C
Cloudy
Early-Evening
84°F 29°C
Light Showers
Balmy with temperatures reaching 83°F 28°C, dry most of the day, with showers developing late, with steady humidity and steady pressure.
Tuesday, September 15, 2026
Mid-Morning
70°F 21°C
Scattered Showers
Mid-Afternoon
78°F 26°C
Sunny
Early-Evening
72°F 23°C
Sunny
Enjoyable around 78°F 26°C, periods of heavy rain and gusty conditions, with lower humidity and steady pressure. Winds switching from the W to the WNW at 11 mph 17 km/h. Gusts up to 24 mph 38 km/h.
Wednesday, September 16, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
65°F 19°C
Sunny
Mild temperatures up to 69°F 21°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the WNW to the SW at 7 mph 11 km/h.
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