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Alton Park, IL Weather Forecast
Alton Park, IL Weather Forecast Dated: 249 PM Thu Aug 27 2026 (Alton Park Time)
Thu, 27th Lo: 18°C65°F Hi: 31°C87°F |
Sunny Thursday, temperatures as high as 87°F31°C, low temperature around 65°F18°C, chance of rain 2%, wind out of the NNW 7 mph12 km/h. Barometric pressure 30.03 in1017 mb, visibility 6 mi10 km, humidity 49%. |
| Fri, 28th Lo: 17°C63°F Hi: 28°C82°F |
Sunny Friday, temperatures as high as 82°F28°C, low temperature around 63°F17°C, chance of rain 2%, wind out of the NE 4 mph7 km/h. Barometric pressure 30.12 in1020 mb, visibility 6 mi10 km, humidity 55%. |
Sat, 29th Lo: 17°C63°F Hi: 28°C83°F |
Overcast Saturday, temperatures as high as 83°F28°C, low temperature around 63°F17°C, chance of rain 14%, wind out of the SSE 7 mph11 km/h. Barometric pressure 30.09 in1019 mb, visibility 6 mi10 km, humidity 59%. |
| Sun, 30th Lo: 20°C67°F Hi: 35°C95°F |
Overcast Sunday, temperatures as high as 95°F35°C, low temperature around 67°F20°C, chance of rain 10%, wind out of the S 13 mph21 km/h. Barometric pressure 29.97 in1015 mb, visibility 6 mi10 km, humidity 37%. |
Mon, 31st Lo: 23°C74°F Hi: 37°C99°F |
Cloudy Monday, temperatures as high as 99°F37°C, low temperature around 74°F23°C, chance of rain 6%, wind out of the SW 15 mph24 km/h. Barometric pressure 29.94 in1014 mb, visibility 6 mi10 km, humidity 36%. |
| Tue, 1st Lo: 25°C78°F Hi: 37°C99°F |
Sunny Tuesday, temperatures as high as 99°F37°C, low temperature around 78°F25°C, chance of rain 1%, wind out of the SW 11 mph17 km/h. Barometric pressure 29.94 in1014 mb, visibility 6 mi10 km, humidity 38%. |
Wed, 2nd Lo: 27°C81°F Hi: 39°C102°F |
Partly Cloudy Wednesday, temperatures as high as 102°F39°C, low temperature around 81°F27°C, chance of rain 1%, wind out of the SW 12 mph19 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 37%. |
| Thu, 3rd Lo: 29°C84°F Hi: 40°C103°F |
Sunny Thursday, temperatures as high as 103°F40°C, low temperature around 84°F29°C, wind out of the SW 11 mph18 km/h. Barometric pressure 29.88 in1012 mb, visibility 6 mi10 km, humidity 31%. |
| Fri, 4th Lo: 29°C84°F Hi: 41°C106°F |
Partly Cloudy Friday, temperatures as high as 106°F41°C, low temperature around 84°F29°C, chance of rain 2%, wind out of the WSW 13 mph20 km/h. Barometric pressure 29.85 in1011 mb, visibility 6 mi10 km, humidity 30%. |
| Sat, 5th Lo: 19°C66°F Hi: 31°C87°F |
Overcast Saturday, temperatures as high as 87°F31°C, low temperature around 66°F19°C, chance of rain 3%, wind out of the ENE 8 mph13 km/h. Barometric pressure 30.06 in1018 mb, visibility 6 mi10 km, humidity 49%. |
| Sun, 6th Lo: 17°C62°F Hi: 31°C88°F |
Partly Cloudy Sunday, temperatures as high as 88°F31°C, low temperature around 62°F17°C, chance of rain 8%, wind out of the SSW 4 mph7 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 46%. |
| Mon, 7th Lo: 17°C63°F Hi: 26°C79°F |
Sunny Monday, temperatures as high as 79°F26°C, low temperature around 63°F17°C, chance of rain 1%, wind out of the SW 10 mph15 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 44%. |
| Tue, 8th Lo: 16°C60°F Hi: 19°C66°F |
Overcast Tuesday, temperatures as high as 66°F19°C, low temperature around 60°F16°C, chance of rain 17%, wind out of the SW 7 mph11 km/h. Barometric pressure 29.85 in1011 mb, visibility 6 mi10 km, humidity 66%. |
| Wed, 9th Lo: 12°C53°F Hi: 21°C71°F |
Sunny Wednesday, temperatures as high as 71°F21°C, low temperature around 53°F12°C, chance of rain 2%, wind out of the SW 11 mph18 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 52%. |
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