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Millstadt, IL Weather Tomorrow

Get the forecast you need for Millstadt tomorrow with an extended 5 day weather 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 throughout the Millstadt area and around St. Clair county, Illinois.
Updated: Tue Sep 15th 2026 9:00 AM CDT
Millstadt, IL Weather – 9-15 – Sunny
98° / 72°
Sunny
Daytime highs will reach 98°F with lows dropping to 72°F in Millstadt, where it will be sunny. Rainfall predicted to have a 57% chance with an estimated 0.05in. Wind will be moderate, blowing around 13mph on average and gusts of 20mph at 10 AM. Humidity levels should be comfortable, sitting around 59% on average, the maximum being 87% at 11 PM and 31% being its lowest at 3 PM. Barometric pressure is its highest of 30.13inHg at 11 PM, a lowest point of 29.98inHg at 5 PM with an avg 30.04inHg.
Millstadt, IL Weather – 9-16 – Sunny
97° / 74°

Weather Tomorrow

Sunny
Daytime highs will reach 97°F with lows dropping to 74°F in Millstadt, where it will be sunny. Rainfall predicted to have a 58% chance with an estimated 0.16in. Winds will be light at 9mph and gusts of 22mph at 3 AM. The humidity will be on the higher side, averaging about 66%, the maximum being 93% at 6 AM and 32% being its lowest at 5 PM. Barometric pressure is its highest of 30.24inHg at 10 AM, a lowest point of 30.11inHg at 12 AM with an avg 30.17inHg.
Millstadt, IL Weather – 9-17 – Sunny
98° / 77°
Sunny
Highs will reach 98°F with lows near 77°F in Millstadt, where a sunny day is. Rainfall predicted to have a 57% chance with an estimated 0.05in. Winds will be light at 10mph and gusts of 20.4mph at 9 PM. Humidity levels should be comfortable, sitting around 57% on average, the maximum being 84% at 9 PM and 32% being its lowest at 3 PM. Barometric pressure is its highest of 30.21inHg at 8 AM, a lowest point of 30.07inHg at 6 PM with an avg 30.16inHg.
Millstadt, IL Weather – 9-18 – Sunny
99° / 75°
Sunny
Millstadt could see sunshine with daytime highs of 99°F and nighttime lows near 75°F. There's a moderate 36% chance of rainfall with an estimated 0.03in. Wind will be moderate, blowing around 12mph on average and gusts of 20.9mph at 8 PM. The humidity will be on the higher side, averaging about 63%, the maximum being 88% at 1 AM and 29% being its lowest at 4 PM. Barometric pressure is its highest of 30.15inHg at 1 AM, a lowest point of 29.97inHg at 6 PM with an avg 30.07inHg.
Millstadt, IL Weather – 9-19 – Overcast
99° / 78°
Overcast
In Millstadt, overcast is likely with a high near 99°F and a low around 78°F. There's a very small chance of rainfall, only about 7% with an estimated 0in. Wind will be moderate, blowing around 13mph on average and gusts of 21.5mph at 2 AM. Humidity levels should be comfortable, sitting around 41% on average, the maximum being 65% at 12 AM and 23% being its lowest at 3 PM. Barometric pressure is its highest of 29.96inHg at 12 AM, a lowest point of 29.81inHg at 6 PM with an avg 29.89inHg.
Millstadt, IL Weather – 9-20 – Overcast
97° / 80°
Overcast
In Millstadt, overcast is likely with a high near 97°F and a low around 80°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 9mph and gusts of 25.8mph at 1 AM. Humidity levels should be comfortable, sitting around 35% on average, the maximum being 50% at 7 AM and 22% being its lowest at 4 PM. Barometric pressure is its highest of 29.87inHg at 10 AM, a lowest point of 29.76inHg at 7 PM with an avg 29.81inHg.

Currently

Sunny 81°F
30.05 inHg.
Barometer
61%
Humidity
SSW 20.2 mph
Wind
Sunny

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