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Oak Run, IL Weather Tomorrow

See tomorrow's forecast for Oak Run together with a reliable 5 day outlook featuring precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction for the Oak Run area and around Knox county, Illinois.
Updated: Thu Sep 17th 2026 10:00 AM CDT
Oak Run, IL Weather – 9-17 – Light Rain Shower
84° / 66°
Light Rain Shower
Oak Run could see rain showers with daytime highs of 84°F and nighttime lows near 66°F. The chance of rain is 87% with an estimated 0.65in. Wind will be moderate, blowing around 11mph on average and gusts of 20.6mph at 9 PM. High humidity with average of 88% is anticipated, the maximum being 98% at 9 PM and 65% being its lowest at 3 PM. Barometric pressure is its highest of 30.21inHg at 11 PM, a lowest point of 30.12inHg at 4 PM with an avg 30.16inHg.
Oak Run, IL Weather – 9-18 – Sunny
78° / 61°

Weather Tomorrow

Sunny
Highs will reach 78°F with lows near 61°F in Oak Run, where sunshine is. Rainfall predicted to have a 70% chance with an estimated 0.1in. Wind will be moderate, blowing around 14mph on average and gusts of 27.3mph at 10 PM. High humidity with average of 89% is anticipated, the maximum being 98% at 10 PM and 71% being its lowest at 4 PM. Barometric pressure is its highest of 30.21inHg at 12 AM, a lowest point of 29.94inHg at 11 PM with an avg 30.12inHg.
Oak Run, IL Weather – 9-19 – Overcast
80° / 72°
Overcast
Daytime highs will reach 80°F with lows dropping to 72°F in Oak Run, where skies will be overcast. Rainfall predicted to have a 68% chance with an estimated 0.07in. Wind will be moderate, blowing around 13mph on average and gusts of 34mph at 4 AM. High humidity with average of 86% is anticipated, the maximum being 96% at 12 AM and 66% being its lowest at 3 PM. Barometric pressure is its highest of 29.95inHg at 12 AM, a lowest point of 29.82inHg at 10 PM with an avg 29.88inHg.
Oak Run, IL Weather – 9-20 – Light Rain Shower
74° / 60°
Light Rain Shower
Daytime highs will reach 74°F with lows dropping to 60°F in Oak Run, where periods of rain are likely. The chance of rain is 92% with an estimated 0.63in. Wind will be moderate, blowing around 15mph on average and gusts of 26.9mph at 11 PM. High humidity with average of 93% is anticipated, the maximum being 99% at 7 AM and 80% being its lowest at 4 PM. Barometric pressure is its highest of 30inHg at 9 PM, a lowest point of 29.83inHg at 4 AM with an avg 29.88inHg.
Oak Run, IL Weather – 9-21 – Scattered Showers
66° / 55°
Scattered Showers
Oak Run may see passing showers, with daytime highs of 66°F and overnight lows near 55°F. The chance of rain is 90% with an estimated 0.34in. Wind will be moderate, blowing around 14mph on average and gusts of 26.4mph at 2 AM. High humidity with average of 90% is anticipated, the maximum being 99% at 7 AM and 83% being its lowest at 10 PM. Barometric pressure is its highest of 30.06inHg at 11 AM, a lowest point of 29.81inHg at 4 AM with an avg 29.94inHg.
Oak Run, IL Weather – 9-22 – Sunny
70° / 54°
Sunny
Daytime highs will reach 70°F with lows dropping to 54°F in Oak Run, where it will be sunny. There might be light rainfall having a 14% chance with an estimated 0in. Wind will be moderate, blowing around 12mph on average and gusts of 19.7mph at 7 AM. The humidity will be on the higher side, averaging about 80%, the maximum being 98% at 7 AM and 62% being its lowest at 1 PM. Barometric pressure is its highest of 30.04inHg at 10 AM, a lowest point of 29.94inHg at 12 AM with an avg 30inHg.

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