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Mendon, IL Weather Tomorrow

Mendon weather tomorrow and 5 day forecast with this week's outlook featuring daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Mendon area and around Adams county, Illinois.
Updated: Wed Nov 4th 2026 5:30 PM CST
Mendon, IL Weather – 11-4 – Overcast
60° / 50°
Overcast
Skies will be overcast in Mendon, with a high of 60°F and a low of 50°F. There's a moderate 28% chance of rainfall with an estimated 0.01in. Wind will be moderate, blowing around 16mph on average and gusts of 25.8mph at 11 PM. The humidity will be on the higher side, averaging about 76%, the maximum being 73% at 11 PM and 68% being its lowest at 10 PM. Barometric pressure is its highest of 29.77inHg at 7 PM, a lowest point of 29.76inHg at 8 PM with an avg 29.76inHg.
Mendon, IL Weather – 11-5 – Overcast
54° / 47°

Weather Tomorrow

Overcast
Mendon may see overcast, with daytime highs of 54°F and overnight lows near 47°F. Rainfall predicted to have a 55% chance with an estimated 0.03in. Wind will be moderate, blowing around 14mph on average and gusts of 28.7mph at 1 AM. The humidity will be on the higher side, averaging about 78%, the maximum being 88% at 4 PM and 68% being its lowest at 9 AM. Barometric pressure is its highest of 30.05inHg at 11 PM, a lowest point of 29.76inHg at 1 AM with an avg 29.87inHg.
Mendon, IL Weather – 11-6 – Sunny
50° / 38°
Sunny
Mendon is set for sunshine with temperatures peaking at 50°F and dipping to 38°F. There's a very small chance of rainfall, only about 6%. Wind will be moderate, blowing around 13mph on average and gusts of 19.9mph at 1 AM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 77% at 12 AM and 41% being its lowest at 2 PM. Barometric pressure is its highest of 30.26inHg at 9 PM, a lowest point of 30.04inHg at 12 AM with an avg 30.18inHg.
Mendon, IL Weather – 11-7 – Overcast
51° / 35°
Overcast
Daytime highs will reach 51°F with lows dropping to 35°F in Mendon, where skies will be overcast. There might be light rainfall having a 11% chance. Winds will be light at 6mph and gusts of 15mph at 7 PM. The humidity will be on the higher side, averaging about 63%, the maximum being 86% at 6 AM and 42% being its lowest at 2 PM. Barometric pressure is its highest of 30.32inHg at 9 AM, a lowest point of 30.24inHg at 1 AM with an avg 30.27inHg.
Mendon, IL Weather – 11-8 – Overcast
59° / 38°
Overcast
Mendon could see overcast with daytime highs of 59°F and nighttime lows near 38°F. There's a very small chance of rainfall, only about 7%. Winds will be light at 5mph and gusts of 16.1mph at 3 PM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 81% at 6 AM and 35% being its lowest at 2 PM. Barometric pressure is its highest of 30.31inHg at 8 AM, a lowest point of 30.18inHg at 3 PM with an avg 30.25inHg.
Mendon, IL Weather – 11-9 – Sunny
63° / 39°
Sunny
Bright and sunny conditions in Mendon, with a high of 63°F and a low of 39°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 8mph and gusts of 13.9mph at 6 PM. The humidity will be on the higher side, averaging about 66%, the maximum being 86% at 6 AM and 47% being its lowest at 3 PM. Barometric pressure is its highest of 30.25inHg at 2 AM, a lowest point of 30.11inHg at 11 PM with an avg 30.18inHg.

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