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Alton IL Weather - Clear - 30°F
Clear
30°F
Updated 11:22 am
Feels Like 20°F
Humidity 50%
Wind ESE 15 mph
Barometer  30.55 in
Dew Point 14°F
Alton IL Weather - Clear - -1°C
Clear
-1°C
Updated 11:22 am
Feels Like -6°C
Humidity 50%
Wind ESE 24 km/h
Barometer  103.5 kPa
Dew Point -10°C
Alton, IL Weather and Current Conditionsalton il weather forecast

Alton, IL Weather Forecast

Alton Illinois WeatherAlton, Illinois Weather Weather Forecast
14 day API forecast for Alton, Illinois. Note. The 7-day weather forecast for Alton, IL is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Alton, IL Weather Forecast Dated: 1122 AM Fri Feb 14 2025 (Alton Time)
Fri, 14th
Alton IL Weather  - Friday, Feb 14, 2025 - Partly Cloudy
Lo: -10°C14°F
Hi: 1°C34°F
Partly Cloudy Friday, temperatures as high as 34°F1°C, low temperature around 14°F-10°C, wind out of the SE 15 mph24 km/h. Barometric pressure 30.47 in1032 mb, visibility 6 mi10 km, humidity 64%, uv index 1.
Sat, 15th
Alton IL Weather  - Saturday, Feb 15, 2025 - Moderate Rain
Lo: 0°C33°F
Hi: 3°C38°F
Moderate rain Saturday, temperatures as high as 38°F3°C, low temperature around 33°F0°C, probability of precipitation 76%, wind out of the SSW 17 mph28 km/h. Barometric pressure 29.85 in1011 mb, visibility 4 mi7 km, humidity 95%.
Sun, 16th
Alton IL Weather  - Sunday, Feb 16, 2025 - Moderate Or Heavy Snow Showers
Lo: -7°C20°F
Hi: -3°C27°F
Moderate or heavy snow showers Sunday, temperatures as high as 27°F-3°C, low temperature around 20°F-7°C, probability of precipitation 75%, wind out of the NW 20 mph33 km/h. Barometric pressure 29.97 in1015 mb, visibility 2 mi4 km, humidity 83%.
Mon, 17th
Alton IL Weather  - Monday, Feb 17, 2025 - Partly Cloudy
Lo: -11°C13°F
Hi: -6°C21°F
Partly Cloudy Monday, temperatures as high as 21°F-6°C, low temperature around 13°F-11°C, wind out of the SW 13 mph21 km/h. Barometric pressure 30.42 in1030 mb, visibility 6 mi10 km, humidity 67%, uv index 1.
Tue, 18th
Alton IL Weather  - Tuesday, Feb 18, 2025 - Heavy Snow
Lo: -12°C10°F
Hi: -9°C16°F
Heavy snow Tuesday, temperatures as high as 16°F-9°C, low temperature around 10°F-12°C, probability of precipitation 67%, wind out of the NE 13 mph21 km/h. Barometric pressure 30.47 in1032 mb, visibility 2 mi4 km, humidity 89%.
Wed, 19th
Alton IL Weather  - Wednesday, Feb 19, 2025 - Patchy Moderate Snow
Lo: -17°C2°F
Hi: -12°C11°F
Patchy moderate snow Wednesday, temperatures as high as 11°F-12°C, low temperature around 2°F-17°C, probability of precipitation 81%, wind out of the WNW 14 mph22 km/h. Barometric pressure 30.56 in1035 mb, visibility 5 mi8 km, humidity 91%.
Thu, 20th
Alton IL Weather  - Thursday, Feb 20, 2025 - Cloudy
Lo: -23°C-9°F
Hi: -12°C10°F
Cloudy Thursday, temperatures as high as 10°F-12°C, low temperature around -9°F-23°C, wind out of the NW 15 mph23 km/h. Barometric pressure 30.53 in1034 mb, visibility 6 mi9 km, humidity 88%, uv index 1.
Fri, 21st
Alton IL Weather  - Friday, Feb 21, 2025 - Sunny
Lo: -21°C-6°F
Hi: -7°C20°F
Sunny Friday, temperatures as high as 20°F-7°C, low temperature around -6°F-21°C, wind out of the WSW 5 mph9 km/h. Barometric pressure 30.68 in1039 mb, visibility 4 mi6 km, humidity 89%, uv index 2.
Sat, 22nd
Alton IL Weather  - Saturday, Feb 22, 2025 - Sunny
Lo: -13°C8°F
Hi: 2°C35°F
Sunny Saturday, temperatures as high as 35°F2°C, low temperature around 8°F-13°C, wind out of the S 13 mph21 km/h. Barometric pressure 30.36 in1028 mb, visibility 5 mi8 km, humidity 90%, uv index 2.
Sun, 23rd
Alton IL Weather  - Sunday, Feb 23, 2025 - Patchy Rain Nearby
Lo: -2°C29°F
Hi: 5°C41°F
Patchy rain nearby Sunday, temperatures as high as 41°F5°C, low temperature around 29°F-2°C, probability of precipitation 62%, wind out of the WSW 12 mph19 km/h. Barometric pressure 30 in1016 mb, visibility 4 mi7 km, humidity 91%.
Mon, 24th
Alton IL Weather  - Monday, Feb 24, 2025 - Patchy Rain Nearby
Lo: 1°C33°F
Hi: 8°C46°F
Patchy rain nearby Monday, temperatures as high as 46°F8°C, low temperature around 33°F1°C, probability of precipitation 86%, wind out of the WSW 11 mph17 km/h. Barometric pressure 29.88 in1012 mb, visibility 4 mi6 km, humidity 93%.
Tue, 25th
Alton IL Weather  - Tuesday, Feb 25, 2025 - Light Freezing Rain
Lo: -1°C30°F
Hi: 3°C37°F
Light freezing rain Tuesday, temperatures as high as 37°F3°C, low temperature around 30°F-1°C, probability of precipitation 89%, wind out of the WNW 15 mph23 km/h. Barometric pressure 29.94 in1014 mb, visibility 6 mi10 km, humidity 84%.
Wed, 26th
Alton IL Weather  - Wednesday, Feb 26, 2025 - Light Freezing Rain
Lo: -3°C27°F
Hi: 2°C36°F
Light freezing rain Wednesday, temperatures as high as 36°F2°C, low temperature around 27°F-3°C, probability of precipitation 71%, wind out of the NNW 11 mph18 km/h. Barometric pressure 29.97 in1015 mb, visibility 6 mi10 km, humidity 84%.
Thu, 27th
Alton IL Weather  - Thursday, Feb 27, 2025 - Mist
Lo: -3°C27°F
Hi: 4°C39°F
Mist Thursday, temperatures as high as 39°F4°C, low temperature around 27°F-3°C, wind out of the WSW 5 mph9 km/h. Barometric pressure 30.09 in1019 mb, visibility 5 mi8 km, humidity 77%, uv index 1.

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