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Pontoon Beach, IL Weather Forecast
Pontoon Beach, IL Weather Forecast Dated: 445 AM Fri Aug 21 2026 (Pontoon Beach Time)
Fri, 21st Lo: 19°C66°F Hi: 35°C95°F |
Sunny Friday, temperatures as high as 95°F35°C, low temperature around 66°F19°C, chance of rain 5%, wind out of the NE 6 mph10 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 66%. |
Sat, 22nd Lo: 22°C71°F Hi: 31°C88°F |
Chance of showers Saturday, temperatures as high as 88°F31°C, low temperature around 71°F22°C, chance of rain 59%, wind out of the NW 10 mph17 km/h. Barometric pressure 29.97 in1015 mb, visibility 6 mi10 km, humidity 71%. |
Sun, 23rd Lo: 20°C68°F Hi: 28°C83°F |
Overcast Sunday, temperatures as high as 83°F28°C, low temperature around 68°F20°C, chance of rain 9%, wind out of the NE 10 mph17 km/h. Barometric pressure 30.03 in1017 mb, visibility 6 mi10 km, humidity 62%. |
| Mon, 24th Lo: 18°C65°F Hi: 28°C82°F |
Overcast Monday, temperatures as high as 82°F28°C, low temperature around 65°F18°C, chance of rain 36%, wind out of the ESE 10 mph16 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 69%. |
| Tue, 25th Lo: 20°C67°F Hi: 31°C88°F |
Overcast Tuesday, temperatures as high as 88°F31°C, low temperature around 67°F20°C, chance of rain 18%, wind out of the ESE 10 mph16 km/h. Barometric pressure 29.91 in1013 mb, visibility 5 mi8 km, humidity 78%. |
| Wed, 26th Lo: 23°C73°F Hi: 34°C93°F |
Sunny Wednesday, temperatures as high as 93°F34°C, low temperature around 73°F23°C, chance of rain 10%, wind out of the ENE 11 mph17 km/h. Barometric pressure 29.88 in1012 mb, visibility 6 mi10 km, humidity 66%. |
| Thu, 27th Lo: 22°C71°F Hi: 32°C90°F |
Sunny Thursday, temperatures as high as 90°F32°C, low temperature around 71°F22°C, chance of rain 2%, wind out of the NE 9 mph14 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 54%. |
| Fri, 28th Lo: 22°C71°F Hi: 37°C98°F |
Sunny Friday, temperatures as high as 98°F37°C, low temperature around 71°F22°C, chance of rain 3%, wind out of the SE 11 mph18 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 51%. |
| Sat, 29th Lo: 26°C79°F Hi: 40°C104°F |
Chance of showers Saturday, temperatures as high as 104°F40°C, low temperature around 79°F26°C, chance of rain 36%, wind out of the S 15 mph24 km/h. Barometric pressure 29.83 in1010 mb, visibility 6 mi10 km, humidity 46%. |
| Sun, 30th Lo: 24°C74°F Hi: 34°C94°F |
Sunny Sunday, temperatures as high as 94°F34°C, low temperature around 74°F24°C, chance of rain 3%, wind out of the N 14 mph22 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 50%. |
| Mon, 31st Lo: 19°C67°F Hi: 34°C93°F |
Sunny Monday, temperatures as high as 93°F34°C, low temperature around 67°F19°C, chance of rain 4%, wind out of the ESE 14 mph23 km/h. Barometric pressure 29.88 in1012 mb, visibility 6 mi10 km, humidity 47%. |
| Tue, 1st Lo: 24°C75°F Hi: 39°C103°F |
Sunny Tuesday, temperatures as high as 103°F39°C, low temperature around 75°F24°C, chance of rain 17%, wind out of the SSE 16 mph26 km/h. Barometric pressure 29.8 in1009 mb, visibility 6 mi10 km, humidity 41%. |
| Wed, 2nd Lo: 23°C73°F Hi: 35°C95°F |
Sunny Wednesday, temperatures as high as 95°F35°C, low temperature around 73°F23°C, chance of rain 2%, wind out of the NE 11 mph17 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 52%. |
| Thu, 3rd Lo: 16°C60°F Hi: 31°C88°F |
Sunny Thursday, temperatures as high as 88°F31°C, low temperature around 60°F16°C, chance of rain 57%, wind out of the E 12 mph20 km/h. Barometric pressure 30.06 in1018 mb, visibility 6 mi10 km, humidity 50%. |
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