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Alton, MO Weather Forecast
Alton, MO Weather Forecast Dated: 431 AM Thu Oct 08 2026
Expect a very warm period with plenty of sunshine and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.
Thursday, October 8, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
87°F 31°C
Sunny
Early-Evening
75°F 24°C
Sunny
Warm and summery near 87°F 31°C, sunny throughout the day, with steady humidity and steady pressure.
Friday, October 9, 2026
Mid-Morning
70°F 21°C
Sunny
Mid-Afternoon
89°F 31°C
Sunny
Early-Evening
76°F 25°C
Sunny
Balmy with temperatures reaching 89°F 31°C, sunny throughout the day, with steady humidity and steady pressure.
Saturday, October 10, 2026
Mid-Morning
67°F 19°C
Overcast
Mid-Afternoon
70°F 21°C
Scattered Showers
Early-Evening
60°F 15°C
Light Rain
Enjoyable around 70°F 21°C, locally heavy downpours at times, with increasing humidity and barometric pressure falling. Winds picking up from E at 4 mph 6 km/h to NNE at 14 mph 22 km/h. Gusts up to 34 mph 55 km/h.
Sunday, October 11, 2026
Mid-Morning
63°F 17°C
Partly Cloudy
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
73°F 23°C
Sunny
Warm temperatures up to 84°F 29°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds switching from the NW to the ESE at 3 mph 5 km/h.
Monday, October 12, 2026
Mid-Morning
71°F 22°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
79°F 26°C
Sunny
Very hot with a high of 90°F 32°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds moving from the WSW to the SW at 7 mph 12 km/h. Gusts up to 22 mph 35 km/h.
Tuesday, October 13, 2026
Mid-Morning
75°F 24°C
Sunny
Mid-Afternoon
90°F 32°C
Sunny
Early-Evening
78°F 26°C
Sunny
Very hot with temperatures reaching 90°F 32°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the W to the NE at 6 mph 10 km/h.
Wednesday, October 14, 2026
Mid-Morning
69°F 20°C
Sunny
Mid-Afternoon
85°F 30°C
Sunny
Early-Evening
77°F 25°C
Sunny
Balmy with temperatures reaching 85°F 30°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds blowing from the SSE at 8 mph 13 km/h.
Thursday, October 15, 2026
Mid-Morning
77°F 25°C
Sunny
Mid-Afternoon
91°F 33°C
Sunny
Early-Evening
83°F 29°C
Sunny
Sizzling hot with 91°F 33°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure. Winds turning from the SSW to the S at 10 mph 16 km/h. Gusts up to 27 mph 43 km/h.
Friday, October 16, 2026
Mid-Morning
73°F 23°C
Partly Cloudy
Mid-Afternoon
78°F 26°C
Overcast
Early-Evening
71°F 22°C
Light Rain
Mild temperatures up to 78°F 26°C, dry most of the day, with showers developing late, with increasing humidity and steady pressure. Winds switching from the SSW to the ESE at 8 mph 12 km/h.
Saturday, October 17, 2026
Mid-Morning
63°F 17°C
Overcast
Mid-Afternoon
77°F 25°C
Sunny
Early-Evening
67°F 20°C
Sunny
Mild with a high of 77°F 25°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds blowing from the ENE at 7 mph 11 km/h.
Sunday, October 18, 2026
Mid-Morning
65°F 18°C
Overcast
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
71°F 21°C
Partly Cloudy
Warm and summery near 81°F 27°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and barometric pressure falling.
Monday, October 19, 2026
Mid-Morning
70°F 21°C
Overcast
Mid-Afternoon
84°F 29°C
Partly Cloudy
Early-Evening
75°F 24°C
Partly Cloudy
Balmy with temperatures reaching 84°F 29°C, cloudy in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure.
Tuesday, October 20, 2026
Mid-Morning
69°F 21°C
Overcast
Mid-Afternoon
79°F 26°C
Overcast
Early-Evening
72°F 23°C
Scattered Showers
Enjoyable around 79°F 26°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.
Wednesday, October 21, 2026
Mid-Morning
67°F 20°C
Partly Cloudy
Mid-Afternoon
81°F 27°C
Sunny
Early-Evening
69°F 21°C
Sunny
Warm temperatures up to 81°F 27°C, sunny throughout the day, with lower humidity and barometric pressure falling.
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