St Clair County, MO 14 Day Weather - WeatherWorld.com

Sizzling hot near 99°F 37°C with a heat index reaching 103°F 39°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds out of the SSE at 7 mph 11 km/h.

Sweltering heat reaching 101°F 38°C, cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling. Winds switching from the S to the SSE at 11 mph 18 km/h. Gusts up to 20 mph 32 km/h.

Dangerously hot with a high of 100°F 38°C (heat index near 103°F 39°C), locally heavy downpours at times, with increasing humidity and steady pressure. Winds decreasing from SW 16 mph 26 km/h to NE 6 mph 9 km/h.

Warm temperatures up to 84°F 29°C, early showers breaking for a drier afternoon, with lower humidity and steady pressure. Winds swinging from the SSW to the SE at 7 mph 12 km/h.

Very hot with a high of 91°F 33°C, overcast in the morning, sunny in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling. Winds shifting from the S to the SE at 7 mph 12 km/h.

Very warm near 80°F 27°C, though humidity makes it feel like 83°F 28°C, morning showers, giving way to clearing skies, with lower humidity and steady pressure. Winds turning from the SE to the ESE at 7 mph 11 km/h.

Warm and summery around 86°F 30°C (feels like 92°F 34°C), periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds switching from the ESE to the SSE at 10 mph 16 km/h. Gusts up to 22 mph 36 km/h.

Hot and sweltering around 93°F 34°C (heat index 99°F 37°C), partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds moving from the SSW to the S at 12 mph 20 km/h. Gusts up to 28 mph 45 km/h.

Mild temperatures up to 70°F 21°C, showers through the afternoon, tapering off by evening, with lower humidity and steady pressure. Winds swinging from the WSW to the NNW at 7 mph 11 km/h.

Mild with a high of 72°F 22°C, sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with lower humidity and steady pressure. Winds shifting from the NE to the ENE at 4 mph 7 km/h.

Pleasant near 77°F 25°C, sunny throughout the day, with lower humidity and steady pressure.

Balmy with temperatures reaching 86°F 30°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds turning from the SSW to the S at 7 mph 12 km/h.

Quite warm around 89°F 32°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds switching from the SSW to the SSE at 5 mph 8 km/h.

Mild temperatures up to 77°F 25°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure. Winds out of the NE at 13 mph 20 km/h. Gusts up to 20 mph 32 km/h.