Macoupin County, IL Weather Tomorrow

Get a closer look at tomorrow's weather in Macoupin County and the upcoming 5 day forecast with daily precipitation forecasts, changing sky conditions, daytime highs, overnight lows, Fahrenheit and Celsius temperatures, sunrise, sunset, wind chill, and local wind details across the Macoupin County area.
Updated: Tue Sep 22nd 2026 1:30 PM CDT
Macoupin County, IL Weather – 9-22 – Overcast
73° / 55°
Overcast
Macoupin County is set for cloud-filled skies with temperatures peaking at 73°F and dipping to 55°F. There might be light rainfall having a 12% chance. Wind will be moderate, blowing around 15mph on average and gusts of 21.4mph at 9 PM. The humidity will be on the higher side, averaging about 74%, the maximum being 88% at 11 PM and 52% being its lowest at 2 PM. Barometric pressure is its highest of 30.21inHg at 11 PM, a lowest point of 30.12inHg at 4 PM with an avg 30.16inHg.
Macoupin County, IL Weather – 9-23 – Sunny
70° / 56°

Weather Tomorrow

Sunny
In Macoupin County, bright and sunny conditions with highs near 70°F and lows around 56°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 13mph on average and gusts of 20.2mph at 12 AM. The humidity will be on the higher side, averaging about 78%, the maximum being 97% at 2 AM and 56% being its lowest at 1 PM. Barometric pressure is its highest of 30.26inHg at 10 PM, a lowest point of 30.21inHg at 12 AM with an avg 30.24inHg.
Macoupin County, IL Weather – 9-24 – Cloudy
74° / 59°
Cloudy
Macoupin County may see cloudy skies, with daytime highs of 74°F and overnight lows near 59°F. There might be light rainfall having a 11% chance. Winds will be light at 9mph and gusts of 19.2mph at 8 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 86% at 7 AM and 48% being its lowest at 4 PM. Barometric pressure is its highest of 30.27inHg at 9 AM, a lowest point of 30.18inHg at 4 PM with an avg 30.22inHg.
Macoupin County, IL Weather – 9-25 – Overcast
72° / 60°
Overcast
In Macoupin County, it will be overcast with highs near 72°F and lows around 60°F. There might be light rainfall having a 18% chance. Winds will be light at 10mph and gusts of 18.6mph at 10 PM. The humidity will be on the higher side, averaging about 75%, the maximum being 94% at 2 AM and 55% being its lowest at 2 PM. Barometric pressure is its highest of 30.24inHg at 8 AM, a lowest point of 30.15inHg at 5 PM with an avg 30.2inHg.
Macoupin County, IL Weather – 9-26 – Overcast
66° / 61°
Overcast
It will be overcast in Macoupin County, with a high of 66°F and a low of 61°F. Rainfall predicted to have a 59% chance with an estimated 0.06in. Wind will be moderate, blowing around 13mph on average and gusts of 25.6mph at 11 PM. The humidity will be on the higher side, averaging about 62%, the maximum being 76% at 8 PM and 47% being its lowest at 7 AM. Barometric pressure is its highest of 30.17inHg at 9 AM, a lowest point of 30.08inHg at 11 PM with an avg 30.14inHg.
Macoupin County, IL Weather – 9-27 – Partly Cloudy
79° / 59°
Partly Cloudy
Macoupin County could see cloudy skies with daytime highs of 79°F and nighttime lows near 59°F. Rainfall predicted to have a 65% chance with an estimated 0.13in. Wind will be moderate, blowing around 12mph on average and gusts of 21.7mph at 7 AM. The humidity will be on the higher side, averaging about 73%, the maximum being 91% at 11 PM and 49% being its lowest at 4 PM. Barometric pressure is its highest of 30.09inHg at 3 AM, a lowest point of 29.94inHg at 4 PM with an avg 30.02inHg.

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