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Alto Pass, IL Weather Tomorrow

Whether you're planning work or travel, tomorrow's Alto Pass weather and 5 day forecast offer 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 Alto Pass area and around Union county, Illinois.
Updated: Sat Oct 24th 2026 8:15 PM CDT
Alto Pass, IL Weather – 10-24 – Partly Cloudy
77° / 51°
Partly Cloudy
Skies will be cloudy in Alto Pass, with a high of 77°F and a low of 51°F. There's a very small chance of rainfall, only about 5%. Winds will be light at 6mph and gusts of 12.5mph at 11 PM. Humidity levels should be comfortable, sitting around 47% on average, the maximum being 65% at 10 PM and 40% being its lowest at 9 PM. Barometric pressure is its highest of 30.34inHg at 10 PM, a lowest point of 30.32inHg at 9 PM with an avg 30.33inHg.
Alto Pass, IL Weather – 10-25 – Overcast
76° / 52°

Weather Tomorrow

Overcast
It will be overcast in Alto Pass, with a high of 76°F and a low of 52°F. There's a very small chance of rainfall, only about 9%. Winds will be light at 10mph and gusts of 13.3mph at 9 AM. Humidity levels should be comfortable, sitting around 52% on average, the maximum being 79% at 7 AM and 33% being its lowest at 2 PM. Barometric pressure is its highest of 30.44inHg at 10 AM, a lowest point of 30.31inHg at 5 PM with an avg 30.36inHg.
Alto Pass, IL Weather – 10-26 – Overcast
75° / 54°
Overcast
Skies will be overcast in Alto Pass, with a high of 75°F and a low of 54°F. There's a very small chance of rainfall, only about 9%. Winds will be light at 8mph and gusts of 9.8mph at 1 PM. Humidity levels should be comfortable, sitting around 53% on average, the maximum being 76% at 7 AM and 32% being its lowest at 3 PM. Barometric pressure is its highest of 30.37inHg at 8 AM, a lowest point of 30.24inHg at 5 PM with an avg 30.31inHg.
Alto Pass, IL Weather – 10-27 – Overcast
74° / 53°
Overcast
Alto Pass could see cloud-filled skies with daytime highs of 74°F and nighttime lows near 53°F. There might be light rainfall having a 12% chance. Winds will be light at 7mph and gusts of 16.1mph at 6 AM. Humidity levels should be comfortable, sitting around 54% on average, the maximum being 79% at 7 AM and 33% being its lowest at 3 PM. Barometric pressure is its highest of 30.29inHg at 9 AM, a lowest point of 30.19inHg at 5 PM with an avg 30.24inHg.
Alto Pass, IL Weather – 10-28 – Sunny
79° / 53°
Sunny
It will be sunny in Alto Pass, with a high of 79°F and a low of 53°F. There's a very small chance of rainfall, only about 2%. Wind will be moderate, blowing around 12mph on average and gusts of 16.3mph at 9 PM. Humidity levels should be comfortable, sitting around 49% on average, the maximum being 76% at 7 AM and 27% being its lowest at 3 PM. Barometric pressure is its highest of 30.28inHg at 9 AM, a lowest point of 30.18inHg at 4 PM with an avg 30.22inHg.
Alto Pass, IL Weather – 10-29 – Sunny
76° / 53°
Sunny
Alto Pass may see sunshine, with daytime highs of 76°F and overnight lows near 53°F. There's a very small chance of rainfall, only about 4%. Winds will be light at 10mph and gusts of 18.6mph at 10 AM. Humidity levels should be comfortable, sitting around 53% on average, the maximum being 74% at 7 AM and 38% being its lowest at 4 PM. Barometric pressure is its highest of 30.28inHg at 10 AM, a lowest point of 30.18inHg at 4 PM with an avg 30.22inHg.

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