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Thayer, IL Weather Tomorrow

Planning ahead? View tomorrow's Thayer weather along with a complete 5 day forecast that includes 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 Thayer area and around Sangamon county, Illinois.
Updated: Tue Sep 8th 2026 5:30 AM CDT
Thayer, IL Weather – 9-8 – Sunny
91° / 62°
Sunny
In Thayer, a sunny day is likely with a high near 91°F and a low around 62°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 11mph on average and gusts of 27.1mph at 11 PM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 78% at 6 AM and 27% being its lowest at 2 PM. Barometric pressure is its highest of 30.11inHg at 8 AM, a lowest point of 30inHg at 6 PM with an avg 30.05inHg.
Thayer, IL Weather – 9-9 – Sunny
94° / 74°

Weather Tomorrow

Sunny
Thayer is set for a sunny day with temperatures peaking at 94°F and dipping to 74°F. Rainfall predicted to have a 64% chance with an estimated 0.29in. Wind will be moderate, blowing around 13mph on average and gusts of 35.8mph at 3 AM. The humidity will be on the higher side, averaging about 61%, the maximum being 94% at 11 PM and 37% being its lowest at 2 PM. Barometric pressure is its highest of 30.04inHg at 9 AM, a lowest point of 29.92inHg at 4 PM with an avg 29.99inHg.
Thayer, IL Weather – 9-10 – Overcast
84° / 71°
Overcast
Daytime highs will reach 84°F with lows dropping to 71°F in Thayer, where skies will be overcast. Rainfall predicted to have a 67% chance with an estimated 0.05in. Winds will be light at 9mph and gusts of 17.9mph at 9 PM. The humidity will be on the higher side, averaging about 80%, the maximum being 97% at 6 AM and 55% being its lowest at 4 PM. Barometric pressure is its highest of 29.97inHg at 8 AM, a lowest point of 29.88inHg at 6 PM with an avg 29.94inHg.
Thayer, IL Weather – 9-11 – Sunny
91° / 69°
Sunny
In Thayer, it will be sunny with highs near 91°F and lows around 69°F. There's a very small chance of rainfall, only about 8% with an estimated 0in. Wind will be moderate, blowing around 11mph on average and gusts of 25.9mph at 10 PM. The humidity will be on the higher side, averaging about 67%, the maximum being 97% at 6 AM and 30% being its lowest at 5 PM. Barometric pressure is its highest of 29.94inHg at 1 AM, a lowest point of 29.79inHg at 6 PM with an avg 29.88inHg.
Thayer, IL Weather – 9-12 – Sunny
94° / 69°
Sunny
Daytime highs will reach 94°F with lows dropping to 69°F in Thayer, where it will be sunny. There's a very small chance of rainfall, only about 6% with an estimated 0in. Wind will be moderate, blowing around 11mph on average and gusts of 26.2mph at 10 PM. The humidity will be on the higher side, averaging about 62%, the maximum being 92% at 6 AM and 40% being its lowest at 4 PM. Barometric pressure is its highest of 29.93inHg at 9 AM, a lowest point of 29.82inHg at 4 AM with an avg 29.86inHg.
Thayer, IL Weather – 9-13 – Sunny
100° / 74°
Sunny
It will be sunny in Thayer, with a high of 100°F and a low of 74°F. Rainfall predicted to have a 57% chance with an estimated 0.14in. Wind will be moderate, blowing around 17mph on average and gusts of 29.8mph at 10 PM. Humidity levels should be comfortable, sitting around 50% on average, the maximum being 85% at 7 AM and 26% being its lowest at 4 PM. Barometric pressure is its highest of 29.95inHg at 7 AM, a lowest point of 29.82inHg at 6 PM with an avg 29.87inHg.

Currently

Clear 64°F
30.08 inHg.
Barometer
76%
Humidity
SE 11.5 mph
Wind
Clear

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