St. Augustine, IL 14 Day Weather - 61474 WeatherWorld.com
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St. Augustine, IL Weather Forecast


St. Augustine, IL Weather Forecast Dated: 116 AM Sat Sep 05 2026
Expect a very warm period 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
82°F 28°C
Overcast
Mid-Afternoon
89°F 32°C
Sunny
Early-Evening
81°F 27°C
Sunny
Warm and summery around 89°F 32°C (feels like 96°F 36°C), overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the WNW to the ENE at 11 mph 18 km/h.
Sunday, September 6, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
83°F 28°C
Overcast
Early-Evening
75°F 24°C
Sunny
Balmy with temperatures reaching 83°F 28°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds blowing from the E at 11 mph 18 km/h. Gusts up to 24 mph 39 km/h.
Monday, September 7, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
83°F 28°C
Sunny
Early-Evening
77°F 25°C
Sunny
Quite warm around 83°F 28°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds ESE at 9 mph 14 km/h. Gusts up to 24 mph 38 km/h.
Tuesday, September 8, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
95°F 35°C
Overcast
Early-Evening
92°F 33°C
Sunny
Hot temperatures near 95°F 35°C, overcast through the afternoon, turning sunny this evening, with lower humidity and barometric pressure falling. Winds swinging from the S to the SSE at 11 mph 19 km/h. Gusts up to 23 mph 37 km/h.
Wednesday, September 9, 2026
Mid-Morning
74°F 23°C
Sunny
Mid-Afternoon
85°F 29°C
Partly Cloudy
Early-Evening
78°F 26°C
Cloudy
Very warm with a high of 85°F 29°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds shifting from the NW to the ESE at 7 mph 12 km/h.
Thursday, September 10, 2026
Mid-Morning
67°F 19°C
Overcast
Mid-Afternoon
78°F 26°C
Overcast
Early-Evening
72°F 23°C
Partly Cloudy
Pleasant near 78°F 26°C, overcast in the morning, cloudy in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the NE to the ENE at 8 mph 12 km/h.
Friday, September 11, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
81°F 27°C
Partly Cloudy
Early-Evening
78°F 26°C
Overcast
Balmy with temperatures reaching 81°F 27°C, overcast through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling. Winds out of the SSE at 8 mph 12 km/h.
Saturday, September 12, 2026
Mid-Morning
73°F 23°C
Cloudy
Mid-Afternoon
94°F 35°C
Partly Cloudy
Early-Evening
92°F 34°C
Sunny
Hot and sweltering around 94°F 35°C (heat index 97°F 36°C), partly cloudy through the afternoon, turning sunny this evening, with lower humidity and steady pressure. Winds moving from the SSE to the S at 15 mph 24 km/h. Gusts up to 30 mph 47 km/h.
Sunday, September 13, 2026
Mid-Morning
85°F 29°C
Sunny
Mid-Afternoon
99°F 37°C
Sunny
Early-Evening
95°F 35°C
Partly Cloudy
Hot temperatures near 99°F 37°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds swinging from the SSW to the S at 11 mph 18 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 14, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
96°F 36°C
Sunny
Early-Evening
92°F 34°C
Cloudy
Sizzling hot near 96°F 36°C with a heat index reaching 99°F 37°C, sunny in the morning, partly cloudy in the afternoon, and overcast this evening, with lower humidity and steady pressure. Winds shifting from the SSW to the S at 13 mph 21 km/h. Gusts up to 26 mph 41 km/h.
Tuesday, September 15, 2026
Mid-Morning
83°F 28°C
Partly Cloudy
Mid-Afternoon
95°F 35°C
Partly Cloudy
Early-Evening
90°F 33°C
Sunny
Very hot with temperatures reaching 95°F 35°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds turning from the S to the SSE at 15 mph 23 km/h. Gusts up to 27 mph 44 km/h.
Wednesday, September 16, 2026
Mid-Morning
80°F 26°C
Sunny
Mid-Afternoon
96°F 35°C
Partly Cloudy
Early-Evening
92°F 34°C
Partly Cloudy
Hot and sweltering around 96°F 35°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with lower humidity and barometric pressure falling. Winds SW at 11 mph 18 km/h. Gusts up to 23 mph 36 km/h.
Thursday, September 17, 2026
Mid-Morning
66°F 19°C
Overcast
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
69°F 21°C
Partly Cloudy
Enjoyable around 77°F 25°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the N to the NNW at 9 mph 15 km/h.
Friday, September 18, 2026
Mid-Morning
54°F 12°C
Sunny
Mid-Afternoon
65°F 19°C
Sunny
Early-Evening
60°F 15°C
Overcast
Mildly cool near 65°F 19°C, sunny in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds swinging from the ESE to the N at 10 mph 16 km/h.
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