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Pontiac, IL Weather Tomorrow

Tomorrow's weather forecast for Pontiac is supported by a complete 5 day outlook covering precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Pontiac area and around Livingston county, Illinois.
Updated: Thu Oct 29th 2026 4:15 AM CDT
Pontiac, IL Weather – 10-29 – Sunny
70° / 54°
Sunny
Pontiac is set for sunshine with temperatures peaking at 70°F and dipping to 54°F. There might be light rainfall having a 22% chance with an estimated 0.01in. Wind will be moderate, blowing around 13mph on average and gusts of 34.2mph at 5 AM. The humidity will be on the higher side, averaging about 64%, the maximum being 79% at 3 PM and 56% being its lowest at 8 PM. Barometric pressure is its highest of 30.23inHg at 10 PM, a lowest point of 30.05inHg at 5 AM with an avg 30.13inHg.
Pontiac, IL Weather – 10-30 – Overcast
66° / 47°

Weather Tomorrow

Overcast
Pontiac may see overcast, with daytime highs of 66°F and overnight lows near 47°F. There's a moderate 45% chance of rainfall with an estimated 0.04in. Winds will be light at 10mph and gusts of 21.3mph at 11 PM. Humidity levels should be comfortable, sitting around 55% on average, the maximum being 78% at 7 AM and 33% being its lowest at 3 PM. Barometric pressure is its highest of 30.34inHg at 9 AM, a lowest point of 30.24inHg at 12 AM with an avg 30.29inHg.
Pontiac, IL Weather – 10-31 – Overcast
63° / 53°
Overcast
Pontiac may see cloud-filled skies, with daytime highs of 63°F and overnight lows near 53°F. Rainfall predicted to have a 67% chance with an estimated 0.11in. Wind will be moderate, blowing around 11mph on average and gusts of 20.8mph at 12 AM. The humidity will be on the higher side, averaging about 61%, the maximum being 77% at 10 PM and 45% being its lowest at 3 PM. Barometric pressure is its highest of 30.34inHg at 10 AM, a lowest point of 30.24inHg at 3 PM with an avg 30.29inHg.
Pontiac, IL Weather – 11-1 – Light Drizzle
65° / 54°
Light Drizzle
Pontiac may see light Drizzle, with daytime highs of 65°F and overnight lows near 54°F. The chance of rain is 80% with an estimated 0.11in. Winds will be light at 9mph and gusts of 19.2mph at 12 AM. High humidity with average of 85% is anticipated, the maximum being 97% at 8 PM and 60% being its lowest at 12 AM. Barometric pressure is its highest of 30.3inHg at 9 AM, a lowest point of 30.12inHg at 11 PM with an avg 30.21inHg.
Pontiac, IL Weather – 11-2 – Scattered Showers
65° / 56°
Scattered Showers
Daytime highs will reach 65°F with lows dropping to 56°F in Pontiac, where on and off showers are set to occur. The chance of rain is 85% with an estimated 0.14in. Wind will be moderate, blowing around 17mph on average and gusts of 34.4mph at 11 PM. High humidity with average of 89% is anticipated, the maximum being 95% at 7 AM and 74% being its lowest at 3 PM. Barometric pressure is its highest of 30.18inHg at 12 AM, a lowest point of 29.9inHg at 11 PM with an avg 30.04inHg.
Pontiac, IL Weather – 11-3 – Scattered Showers
67° / 61°
Scattered Showers
Passing showers are in the forecast for Pontiac, with a high of 67°F and a low of 61°F. The chance of rain is 87% with an estimated 0.31in. Wind will be moderate, blowing around 18mph on average and gusts of 38.1mph at 9 AM. High humidity with average of 84% is anticipated, the maximum being 91% at 5 AM and 73% being its lowest at 11 PM. Barometric pressure is its highest of 29.89inHg at 12 AM, a lowest point of 29.81inHg at 1 PM with an avg 29.84inHg.

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