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Sinclair, IL Weather Tomorrow

Whether you're planning work or travel, tomorrow's Sinclair weather and 5 day forecast offer daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details for the Sinclair area and around Morgan county, Illinois.
Updated: Wed Oct 21st 2026 6:15 PM CDT
Sinclair, IL Weather – 10-21 – Sunny
75° / 52°
Sunny
Sinclair may see a sunny day, with daytime highs of 75°F and overnight lows near 52°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 6mph and gusts of 14.5mph at 11 PM. Humidity levels should be comfortable, sitting around 46% on average, the maximum being 63% at 10 PM and 41% being its lowest at 8 PM. Barometric pressure is its highest of 30.22inHg at 10 PM, a lowest point of 30.19inHg at 7 PM with an avg 30.2inHg.
Sinclair, IL Weather – 10-22 – Sunny
76° / 52°

Weather Tomorrow

Sunny
Sinclair is set for sunshine with temperatures peaking at 76°F and dipping to 52°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 7mph and gusts of 13.2mph at 2 PM. Humidity levels should be comfortable, sitting around 51% on average, the maximum being 78% at 7 AM and 32% being its lowest at 2 PM. Barometric pressure is its highest of 30.26inHg at 9 AM, a lowest point of 30.18inHg at 3 PM with an avg 30.22inHg.
Sinclair, IL Weather – 10-23 – Sunny
76° / 53°
Sunny
Highs will reach 76°F with lows near 53°F in Sinclair, where sunshine is. There's a very small chance of rainfall, only about 4%. Winds will be light at 10mph and gusts of 21.5mph at 11 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 77% at 7 AM and 32% being its lowest at 3 PM. Barometric pressure is its highest of 30.31inHg at 10 AM, a lowest point of 30.21inHg at 3 PM with an avg 30.25inHg.
Sinclair, IL Weather – 10-24 – Overcast
75° / 53°
Overcast
In Sinclair, cloud-filled skies are likely with a high near 75°F and a low around 53°F. There's a very small chance of rainfall, only about 7%. Wind will be moderate, blowing around 11mph on average and gusts of 21.7mph at 12 AM. Humidity levels should be comfortable, sitting around 41% on average, the maximum being 62% at 7 AM and 25% being its lowest at 2 PM. Barometric pressure is its highest of 30.36inHg at 9 AM, a lowest point of 30.28inHg at 3 PM with an avg 30.31inHg.
Sinclair, IL Weather – 10-25 – Overcast
76° / 57°
Overcast
Sinclair is set for cloud-filled skies with temperatures peaking at 76°F and dipping to 57°F. There's a very small chance of rainfall, only about 10%. Winds will be light at 9mph and gusts of 18.3mph at 12 AM. Humidity levels should be comfortable, sitting around 42% on average, the maximum being 54% at 7 AM and 29% being its lowest at 4 PM. Barometric pressure is its highest of 30.37inHg at 9 AM, a lowest point of 30.27inHg at 4 PM with an avg 30.32inHg.
Sinclair, IL Weather – 10-26 – Overcast
76° / 58°
Overcast
Daytime highs will reach 76°F with lows dropping to 58°F in Sinclair, where skies will be overcast. There's a very small chance of rainfall, only about 10%. Winds will be light at 9mph and gusts of 13.7mph at 3 AM. Humidity levels should be comfortable, sitting around 43% on average, the maximum being 56% at 7 AM and 29% being its lowest at 4 PM. Barometric pressure is its highest of 30.31inHg at 6 AM, a lowest point of 30.2inHg at 4 PM with an avg 30.26inHg.

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