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Williamson County, IL Weather Forecast
Williamson County, IL Weather Forecast Dated: 1220 AM Tue Mar 03 2026 (Williamson County Time)
Tue, 3rd Lo: 5°C40°F Hi: 22°C71°F |
Patchy rain nearby Tuesday, temperatures as high as 71°F22°C, low temperature around 40°F5°C, chance of rain 88%, wind out of the S 13 mph22 km/h. Barometric pressure 30.09 in1019 mb, visibility 4 mi7 km, humidity 86%. |
| Wed, 4th Lo: 15°C58°F Hi: 20°C68°F |
Patchy rain nearby Wednesday, temperatures as high as 68°F20°C, low temperature around 58°F15°C, chance of rain 64%, wind out of the SSW 15 mph25 km/h. Barometric pressure 30.06 in1018 mb, visibility 6 mi9 km, humidity 93%. |
Thu, 5th Lo: 13°C55°F Hi: 18°C64°F |
Heavy rain Thursday, temperatures as high as 64°F18°C, low temperature around 55°F13°C, chance of rain 88%, wind out of the SSW 15 mph24 km/h. Barometric pressure 30.06 in1018 mb, visibility 5 mi8 km, humidity 97%. |
| Fri, 6th Lo: 15°C59°F Hi: 25°C77°F |
Patchy rain nearby Friday, temperatures as high as 77°F25°C, low temperature around 59°F15°C, chance of rain 78%, wind out of the S 17 mph27 km/h. Barometric pressure 30 in1016 mb, visibility 5 mi8 km, humidity 81%. |
| Sat, 7th Lo: 15°C59°F Hi: 20°C68°F |
Moderate rain Saturday, temperatures as high as 68°F20°C, low temperature around 59°F15°C, chance of rain 85%, wind out of the SW 19 mph30 km/h. Barometric pressure 30.03 in1017 mb, visibility 6 mi10 km, humidity 85%. |
Sun, 8th Lo: 11°C53°F Hi: 16°C60°F |
Overcast Sunday, temperatures as high as 60°F16°C, low temperature around 53°F11°C, wind out of the SSW 9 mph15 km/h. Barometric pressure 30.09 in1019 mb, visibility 6 mi10 km, humidity 75%, uv index 3. |
Mon, 9th Lo: 13°C56°F Hi: 22°C71°F |
Sunny Monday, temperatures as high as 71°F22°C, low temperature around 56°F13°C, wind out of the SW 11 mph17 km/h. Barometric pressure 30.06 in1018 mb, visibility 6 mi10 km, humidity 71%, uv index 5. |
Tue, 10th Lo: 15°C59°F Hi: 26°C78°F |
Partly Cloudy Tuesday, temperatures as high as 78°F26°C, low temperature around 59°F15°C, wind out of the S 22 mph35 km/h. Barometric pressure 29.91 in1013 mb, visibility 6 mi10 km, humidity 75%, uv index 6. |
| Wed, 11th Lo: 3°C37°F Hi: 20°C69°F |
Moderate rain Wednesday, temperatures as high as 69°F20°C, low temperature around 37°F3°C, chance of rain 86%, wind out of the SW 22 mph35 km/h. Barometric pressure 29.74 in1007 mb, visibility 6 mi9 km, humidity 84%. |
| Thu, 12th Lo: 3°C37°F Hi: 10°C50°F |
Patchy rain nearby Thursday, temperatures as high as 50°F10°C, low temperature around 37°F3°C, chance of rain 86%, wind out of the SSE 14 mph22 km/h. Barometric pressure 30.12 in1020 mb, visibility 6 mi10 km, humidity 71%. |
| Fri, 13th Lo: 3°C37°F Hi: 18°C65°F |
Sunny Friday, temperatures as high as 65°F18°C, low temperature around 37°F3°C, wind out of the SSE 16 mph25 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi10 km, humidity 77%, uv index 4. |
| Sat, 14th Lo: 5°C41°F Hi: 7°C44°F |
Patchy rain nearby Saturday, temperatures as high as 44°F7°C, low temperature around 41°F5°C, wind out of the SE 15 mph24 km/h. Barometric pressure 30.27 in1025 mb, visibility 6 mi10 km, humidity 70%, uv index 2. |
| Sun, 15th Lo: 3°C37°F Hi: 7°C45°F |
Moderate rain Sunday, temperatures as high as 45°F7°C, low temperature around 37°F3°C, chance of rain 89%, wind out of the SSE 15 mph23 km/h. Barometric pressure 30 in1016 mb, visibility 6 mi9 km, humidity 92%. |
| Mon, 16th Lo: 2°C35°F Hi: 6°C43°F |
Patchy rain nearby Monday, temperatures as high as 43°F6°C, low temperature around 35°F2°C, chance of rain 86%, wind out of the WNW 14 mph23 km/h. Barometric pressure 30.06 in1018 mb, visibility 6 mi10 km, humidity 84%. |
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