Cass County, IL Weather Tomorrow

Check the latest weather forecast for Cass County tomorrow and over the next 5 days with precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the Cass County area.
Updated: Fri Oct 23rd 2026 5:15 AM CDT
Cass County, IL Weather – 10-23 – Sunny
76° / 54°
Sunny
Cass County could see a sunny day with daytime highs of 76°F and nighttime lows near 54°F. There's a very small chance of rainfall, only about 2%. Winds will be light at 9mph and gusts of 18.6mph at 11 PM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 74% at 7 AM and 32% being its lowest at 2 PM. Barometric pressure is its highest of 30.28inHg at 9 AM, a lowest point of 30.19inHg at 5 PM with an avg 30.24inHg.
Cass County, IL Weather – 10-24 – Overcast
75° / 54°

Weather Tomorrow

Overcast
Overcast is in the forecast for Cass County, with a high of 75°F and a low of 54°F. There's a very small chance of rainfall, only about 6%. Winds will be light at 10mph and gusts of 20.8mph at 12 AM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 73% at 7 AM and 29% being its lowest at 2 PM. Barometric pressure is its highest of 30.34inHg at 10 AM, a lowest point of 30.25inHg at 12 AM with an avg 30.29inHg.
Cass County, IL Weather – 10-25 – Overcast
77° / 54°
Overcast
Daytime highs will reach 77°F with lows dropping to 54°F in Cass County, where it will be overcast. There's a very small chance of rainfall, only about 7%. Winds will be light at 8mph and gusts of 11.9mph at 12 AM. Humidity levels should be comfortable, sitting around 46% on average, the maximum being 69% at 7 AM and 27% being its lowest at 2 PM. Barometric pressure is its highest of 30.39inHg at 10 AM, a lowest point of 30.27inHg at 5 PM with an avg 30.32inHg.
Cass County, IL Weather – 10-26 – Overcast
74° / 55°
Overcast
Cloud-filled skies are in the forecast for Cass County, with a high of 74°F and a low of 55°F. There might be light rainfall having a 11% chance. Winds will be light at 6mph and gusts of 7.6mph at 2 PM. Humidity levels should be comfortable, sitting around 50% on average, the maximum being 73% at 7 AM and 34% being its lowest at 3 PM. Barometric pressure is its highest of 30.35inHg at 10 AM, a lowest point of 30.22inHg at 5 PM with an avg 30.28inHg.
Cass County, IL Weather – 10-27 – Overcast
73° / 55°
Overcast
Daytime highs will reach 73°F with lows dropping to 55°F in Cass County, where it will be overcast. There might be light rainfall having a 11% chance. Wind will be moderate, blowing around 13mph on average and gusts of 21.5mph at 10 PM. Humidity levels should be comfortable, sitting around 55% on average, the maximum being 80% at 7 AM and 37% being its lowest at 2 PM. Barometric pressure is its highest of 30.28inHg at 10 AM, a lowest point of 30.13inHg at 5 PM with an avg 30.2inHg.
Cass County, IL Weather – 10-28 – Sunny
71° / 55°
Sunny
Sunshine is in the forecast for Cass County, with a high of 71°F and a low of 55°F. There's a very small chance of rainfall, only about 4%. Wind will be moderate, blowing around 11mph on average and gusts of 25.7mph at 11 PM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 73% at 4 AM and 41% being its lowest at 1 PM. Barometric pressure is its highest of 30.18inHg at 12 AM, a lowest point of 30.03inHg at 11 PM with an avg 30.11inHg.

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