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Somonauk, IL Weather Tomorrow

Somonauk weather tomorrow and 5 day forecast with this week's outlook featuring precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Somonauk area and around LaSalle county, Illinois.
Updated: Sat Aug 29th 2026 10:30 AM CDT
Somonauk, IL Weather – 8-29 – Overcast
81° / 60°
Overcast
Daytime highs will reach 81°F with lows dropping to 60°F in Somonauk, where skies will be overcast. There's a moderate 26% chance of rainfall with an estimated 0in. Wind will be moderate, blowing around 15mph on average and gusts of 33.2mph at 11 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 96% at 9 PM and 50% being its lowest at 3 PM. Barometric pressure is its highest of 30.12inHg at 11 AM, a lowest point of 29.98inHg at 11 PM with an avg 30.03inHg.
Somonauk, IL Weather – 8-30 – Scattered Showers
83° / 66°

Weather Tomorrow

Scattered Showers
In Somonauk, passing showers are likely with a high near 83°F and a low around 66°F. Rainfall predicted to have a 67% chance with an estimated 0.06in. Wind will be moderate, blowing around 15mph on average and gusts of 39.1mph at 10 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 90% at 6 AM and 53% being its lowest at 11 PM. Barometric pressure is its highest of 29.97inHg at 12 PM, a lowest point of 29.85inHg at 11 PM with an avg 29.92inHg.
Somonauk, IL Weather – 8-31 – Overcast
86° / 68°
Overcast
Daytime highs will reach 86°F with lows dropping to 68°F in Somonauk, where it will be overcast. There's a moderate 40% chance of rainfall with an estimated 0.02in. Wind will be moderate, blowing around 14mph on average and gusts of 35.6mph at 12 AM. The humidity will be on the higher side, averaging about 71%, the maximum being 85% at 8 PM and 51% being its lowest at 1 AM. Barometric pressure is its highest of 29.88inHg at 8 AM, a lowest point of 29.79inHg at 8 PM with an avg 29.84inHg.
Somonauk, IL Weather – 9-1 – Overcast
86° / 73°
Overcast
In Somonauk, overcast is likely with a high near 86°F and a low around 73°F. There might be light rainfall having a 20% chance with an estimated 0in. Wind will be moderate, blowing around 13mph on average and gusts of 39.2mph at 11 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 85% at 8 PM and 49% being its lowest at 11 PM. Barometric pressure is its highest of 29.88inHg at 9 PM, a lowest point of 29.82inHg at 12 AM with an avg 29.85inHg.
Somonauk, IL Weather – 9-2 – Sunny
88° / 73°
Sunny
In Somonauk, it will be sunny with highs near 88°F and lows around 73°F. There's a very small chance of rainfall, only about 7% with an estimated 0in. Wind will be moderate, blowing around 15mph on average and gusts of 39.6mph at 12 AM. The humidity will be on the higher side, averaging about 69%, the maximum being 88% at 11 PM and 48% being its lowest at 3 AM. Barometric pressure is its highest of 29.9inHg at 11 PM, a lowest point of 29.81inHg at 6 AM with an avg 29.84inHg.
Somonauk, IL Weather – 9-3 – Sunny
84° / 70°
Sunny
Highs will reach 84°F with lows near 70°F in Somonauk, where a sunny day is. There's a very small chance of rainfall, only about 10%. Winds will be light at 8mph and gusts of 15.9mph at 11 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 95% at 1 AM and 59% being its lowest at 4 PM. Barometric pressure is its highest of 29.98inHg at 9 AM, a lowest point of 29.91inHg at 12 AM with an avg 29.96inHg.

Currently

Overcast 70°F
30.12 inHg.
Barometer
78%
Humidity
SSW 14.8 mph
Wind
Overcast

5 Day Forecast Nearby

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