Lerna, IL 14 Day Weather - 62440 WeatherWorld.com
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Lerna, IL Weather Forecast


Lerna, IL Weather Forecast Dated: 458 AM Sat Sep 05 2026
Expect a hot stretch with a mix of sun and clouds and mostly dry weather over the coming period. moderate humidity and no major pressure swings will dominate.
Saturday, September 5, 2026
Mid-Morning
88°F 31°C
Sunny
Mid-Afternoon
91°F 33°C
Nearby Thunderstorms
Early-Evening
84°F 29°C
Sunny
Sizzling hot near 91°F 33°C with a heat index reaching 96°F 36°C, periods of heavy thunderstorms, with increasing humidity and steady pressure. Winds turning from the WNW to the NE at 9 mph 14 km/h.
Sunday, September 6, 2026
Mid-Morning
71°F 21°C
Sunny
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
72°F 22°C
Sunny
Balmy with temperatures reaching 82°F 28°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the NE at 12 mph 19 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 7, 2026
Mid-Morning
65°F 19°C
Sunny
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
73°F 23°C
Sunny
Quite warm around 81°F 27°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds moving from the ENE to the NE at 9 mph 13 km/h.
Tuesday, September 8, 2026
Mid-Morning
72°F 22°C
Sunny
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
86°F 30°C
Partly Cloudy
Warm temperatures up to 89°F 32°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds swinging from the S to the SSE at 6 mph 10 km/h.
Wednesday, September 9, 2026
Mid-Morning
80°F 27°C
Overcast
Mid-Afternoon
95°F 35°C
Sunny
Early-Evening
84°F 29°C
Partly Cloudy
Very hot with a high of 95°F 35°C, overcast in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds shifting from the SW to the N at 9 mph 15 km/h.
Thursday, September 10, 2026
Mid-Morning
75°F 24°C
Cloudy
Mid-Afternoon
83°F 28°C
Overcast
Early-Evening
73°F 23°C
Overcast
Warm and summery near 83°F 28°C, overcast through the afternoon, turning cloudy this evening, with increasing humidity and steady pressure. Winds turning from the WSW to the NE at 8 mph 13 km/h.
Friday, September 11, 2026
Mid-Morning
66°F 19°C
Scattered Showers
Mid-Afternoon
82°F 28°C
Scattered Showers
Early-Evening
74°F 24°C
Scattered Showers
Balmy with temperatures reaching 82°F 28°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. Winds switching from the E to the NE at 11 mph 17 km/h.
Saturday, September 12, 2026
Mid-Morning
69°F 21°C
Cloudy
Mid-Afternoon
82°F 28°C
Sunny
Early-Evening
74°F 23°C
Sunny
Quite warm around 82°F 28°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the E at 13 mph 22 km/h. Gusts up to 24 mph 38 km/h.
Sunday, September 13, 2026
Mid-Morning
68°F 20°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
79°F 26°C
Sunny
Warm temperatures up to 86°F 30°C, sunny throughout the day, with lower humidity and steady pressure. Winds swinging from the ESE to the E at 11 mph 17 km/h. Gusts up to 22 mph 34 km/h.
Monday, September 14, 2026
Mid-Morning
78°F 26°C
Sunny
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
90°F 32°C
Sunny
Sizzling hot near 96°F 36°C with a heat index reaching 99°F 37°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds shifting from the SSE to the ESE at 8 mph 12 km/h.
Tuesday, September 15, 2026
Mid-Morning
84°F 29°C
Overcast
Mid-Afternoon
99°F 37°C
Overcast
Early-Evening
90°F 33°C
Sunny
Very hot with temperatures reaching 99°F 37°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and steady pressure.
Wednesday, September 16, 2026
Mid-Morning
79°F 26°C
Cloudy
Mid-Afternoon
96°F 36°C
Nearby Thunderstorms
Early-Evening
88°F 32°C
Sunny
Very hot with a high of 96°F 36°C, feeling closer to 99°F 37°C in the humidity, heavy thunderstorms conditions at times, with lower humidity and barometric pressure falling.
Thursday, September 17, 2026
Mid-Morning
79°F 26°C
Scattered Showers
Mid-Afternoon
84°F 29°C
Cloudy
Early-Evening
86°F 30°C
Overcast
Warm and summery around 84°F 29°C (feels like 87°F 31°C), periods of heavy rain and gusty conditions, with lower humidity and barometric pressure falling. Winds turning from the SSW to the S at 9 mph 14 km/h. Gusts up to 21 mph 33 km/h.
Friday, September 18, 2026
Mid-Morning
78°F 26°C
Cloudy
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
80°F 27°C
Sunny
Hot and sweltering around 91°F 33°C (heat index 94°F 34°C), partly cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds switching from the ESE to the ENE at 12 mph 19 km/h. Gusts up to 22 mph 36 km/h.
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