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Plainview, IL Weather Tomorrow

Keep up with changing weather in Plainview using tomorrow's forecast and the next 5 days of precipitation chances, day and night conditions, high and low temperatures in Fahrenheit and Celsius, sunrise, sunset, sky conditions, wind chill, and wind speed with direction for the Plainview area and around Macoupin county, Illinois.
Updated: Wed Oct 7th 2026 5:45 AM CDT
Plainview, IL Weather – 10-7 – Sunny
88° / 57°
Sunny
Bright and sunny conditions in Plainview, with a high of 88°F and a low of 57°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 13mph on average and gusts of 21.7mph at 9 PM. Humidity levels should be comfortable, sitting around 47% on average, the maximum being 69% at 11 PM and 33% being its lowest at 2 PM. Barometric pressure is its highest of 29.96inHg at 11 PM, a lowest point of 29.84inHg at 3 PM with an avg 29.91inHg.
Plainview, IL Weather – 10-8 – Sunny
84° / 57°

Weather Tomorrow

Sunny
It will be sunny in Plainview, with a high of 84°F and a low of 57°F. There's a very small chance of rainfall, only about 1%. Winds will be light at 9mph and gusts of 15mph at 4 PM. Humidity levels should be comfortable, sitting around 43% on average, the maximum being 70% at 6 AM and 18% being its lowest at 3 PM. Barometric pressure is its highest of 30.09inHg at 9 AM, a lowest point of 29.97inHg at 12 AM with an avg 30.03inHg.
Plainview, IL Weather – 10-9 – Sunny
89° / 61°
Sunny
Sunshine is in the forecast for Plainview, with a high of 89°F and a low of 61°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 11mph on average and gusts of 21mph at 10 PM. Humidity levels should be comfortable, sitting around 36% on average, the maximum being 51% at 11 PM and 28% being its lowest at 4 PM. Barometric pressure is its highest of 30.1inHg at 10 AM, a lowest point of 29.98inHg at 4 PM with an avg 30.04inHg.
Plainview, IL Weather – 10-10 – Overcast
80° / 60°
Overcast
In Plainview, it will be overcast with highs near 80°F and lows around 60°F. There's a very small chance of rainfall, only about 9%. Wind will be moderate, blowing around 20mph on average and gusts of 32.2mph at 7 PM. Humidity levels should be comfortable, sitting around 58% on average, the maximum being 89% at 11 PM and 34% being its lowest at 3 PM. Barometric pressure is its highest of 30.05inHg at 8 AM, a lowest point of 29.88inHg at 11 PM with an avg 29.99inHg.
Plainview, IL Weather – 10-11 – Sunny
88° / 58°
Sunny
Highs will reach 88°F with lows near 58°F in Plainview, where sunshine is. There's a very small chance of rainfall, only about 4%. Winds will be light at 9mph and gusts of 19.7mph at 11 PM. Humidity levels should be comfortable, sitting around 60% on average, the maximum being 96% at 7 AM and 27% being its lowest at 4 PM. Barometric pressure is its highest of 29.94inHg at 9 AM, a lowest point of 29.86inHg at 4 PM with an avg 29.89inHg.
Plainview, IL Weather – 10-12 – Sunny
92° / 69°
Sunny
Daytime highs will reach 92°F with lows dropping to 69°F in Plainview, where bright and sunny conditions. There's a very small chance of rainfall, only about 3%. Wind will be moderate, blowing around 14mph on average and gusts of 29.5mph at 4 AM. Humidity levels should be comfortable, sitting around 45% on average, the maximum being 60% at 7 AM and 29% being its lowest at 4 PM. Barometric pressure is its highest of 29.95inHg at 7 AM, a lowest point of 29.82inHg at 4 PM with an avg 29.89inHg.

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