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Alton, IL Weather Forecast

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Alton, IL Weather Forecast

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Alton IL weather - Clear - 51°F
Clear
51°F
Updated 8:09 pm
Feels Like 49°F
Humidity 76%
Wind W 6 mph
Barometer  30.11 in
Dew Point 44°F
Alton IL weather - Clear - 11°C
Clear
11°C
Updated 8:09 pm
Feels Like 9°C
Humidity 76%
Wind W 10 km/h
Barometer  102 kPa
Dew Point 7°C
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Alton Weather Forecast

TONIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT VETERANS DAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY FRIDAY NIGHT SATURDAY
Alton, IL Weather - Tonight Patchy Fog Alton, IL Weather - Monday Patchy Fog Alton, IL Weather - Monday Night Clear Alton, IL Weather - Tuesday Sunny Alton, IL Weather - Tuesday Night Partly Cloudy Alton, IL Weather - Veterans Day Chance Of T-Storm Alton, IL Weather - Wednesday Night Chance Of Rain Alton, IL Weather - Thursday Partly Cloudy Alton, IL Weather - Thursday Night Partly Cloudy Alton, IL Weather - Friday Mostly Clear Alton, IL Weather - Friday Night Mostly Clear Alton, IL Weather - Saturday Mostly Clear
Patchy Fog Patchy Fog Clear Sunny Partly Cloudy Chance of T-Storm Chance of Rain Partly Cloudy Partly Cloudy Mostly Clear Mostly Clear Mostly Clear
Lo: 41°FLo: 5°C Hi: 65°FHi: 18°C
 Lo: 45°FLo: 7°C Hi: 69°FHi: 21°C
 Lo: 49°FLo: 9°C Hi: 69°FHi: 21°C
 Lo: 41°FLo: 5°C Hi: 51°FHi: 11°C
Lo: 31°FLo: -1°C		 Hi: 51°FHi: 11°C
Lo: 31°FLo: -1°C		 Hi: 49°FHi: 9°C
Lo: 29°FLo: -2°C		 Hi: 49°FHi: 9°C
Lo: 29°FLo: -2°C		 Hi: 51°FHi: 11°C
Lo: 35°FLo: 2°C
POP: 30% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 508 PM CST Sun Nov 08 2026 Alton, IL Weather - WeatherWorld.com

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Issued: 544 PM CST Sun Nov 8 2026

Key Messages

  • The next chance (30-40%) for light rain on comes on Wednesday.
  • Temperatures will start the week above normal (highs in the 60s- 70s) and end the week below normal (highs in the 40s-50s).

Aviation

/00Z TAFS THROUGH 06Z TUESDAY/... Issued at 535 PM CST Sun Nov 8 2026

Areas of fog are expected again after 06Z tonight, mostly in the vicinity of mainstem rivers and other bodies of water. However there are indications that more widespread fog is possible across parts of central and northeast ...