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Pittsburg, IL Weather Tomorrow

Tomorrow's Pittsburg weather report includes an accurate 5 day forecast 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 Pittsburg area and around Williamson county, Illinois.
Updated: Sat Oct 31st 2026 7:30 AM CDT
Pittsburg, IL Weather – 10-31 – Overcast
74° / 60°
Overcast
Highs will reach 74°F with lows near 60°F in Pittsburg, where overcast is. There might be light rainfall having a 19% chance with an estimated 0in. Winds will be light at 8mph and gusts of 19.7mph at 11 PM. Humidity levels should be comfortable, sitting around 47% on average, the maximum being 72% at 7 PM and 38% being its lowest at 11 AM. Barometric pressure is its highest of 30.27inHg at 10 AM, a lowest point of 30.18inHg at 5 PM with an avg 30.23inHg.
Pittsburg, IL Weather – 11-1 – Overcast
67° / 56°

Weather Tomorrow

Overcast
Daytime highs will reach 67°F with lows dropping to 56°F in Pittsburg, where it will be overcast. The chance of rain is 90% with an estimated 0.33in. Wind will be moderate, blowing around 12mph on average and gusts of 23.9mph at 2 AM. High humidity with average of 88% is anticipated, the maximum being 94% at 11 PM and 52% being its lowest at 12 AM. Barometric pressure is its highest of 30.29inHg at 9 AM, a lowest point of 30.19inHg at 11 PM with an avg 30.24inHg.
Pittsburg, IL Weather – 11-2 – Overcast
69° / 58°
Overcast
Highs will reach 69°F with lows near 58°F in Pittsburg, where cloud-filled skies are. Rainfall predicted to have a 61% chance with an estimated 0.03in. Wind will be moderate, blowing around 16mph on average and gusts of 35.2mph at 11 PM. High humidity with average of 83% is anticipated, the maximum being 96% at 4 AM and 66% being its lowest at 3 PM. Barometric pressure is its highest of 30.2inHg at 12 AM, a lowest point of 29.99inHg at 11 PM with an avg 30.1inHg.
Pittsburg, IL Weather – 11-3 – Scattered Showers
74° / 64°
Scattered Showers
Pittsburg could see passing showers with daytime highs of 74°F and nighttime lows near 64°F. The chance of rain is 87% with an estimated 1.13in. Wind will be moderate, blowing around 20mph on average and gusts of 38mph at 9 AM. The humidity will be on the higher side, averaging about 80%, the maximum being 98% at 11 PM and 65% being its lowest at 11 AM. Barometric pressure is its highest of 29.99inHg at 1 AM, a lowest point of 29.84inHg at 10 PM with an avg 29.91inHg.
Pittsburg, IL Weather – 11-4 – Overcast
67° / 57°
Overcast
It will be overcast in Pittsburg, with a high of 67°F and a low of 57°F. The chance of rain is 85% with an estimated 0.54in. Wind will be moderate, blowing around 11mph on average and gusts of 17.2mph at 8 AM. The humidity will be on the higher side, averaging about 80%, the maximum being 99% at 2 AM and 51% being its lowest at 4 PM. Barometric pressure is its highest of 29.92inHg at 10 AM, a lowest point of 29.77inHg at 3 PM with an avg 29.85inHg.
Pittsburg, IL Weather – 11-5 – Cloudy
67° / 54°
Cloudy
It will be cloudy in Pittsburg, with a high of 67°F and a low of 54°F. There might be light rainfall having a 16% chance. Winds will be light at 4mph and gusts of 15.7mph at 6 PM. The humidity will be on the higher side, averaging about 73%, the maximum being 84% at 3 AM and 56% being its lowest at 12 PM. Barometric pressure is its highest of 29.91inHg at 9 AM, a lowest point of 29.85inHg at 12 AM with an avg 29.9inHg.

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