Weather Forecast and Radar for Granite City, Illinois

Weather in Granite City, IL

Winter in Granite City, Illinois, United States is generally cold with average temperatures ranging from 21°F to 34°F. The coldest months are December, January and February when temperatures can drop to 0°F or below. Snow and ice storms are common during the winter months.

Spring in Granite City is generally mild with average temperatures ranging from 39°F to 63°F. The wettest months are March and April, when rain is common.

Summer in Granite City is generally hot and humid with average temperatures ranging from 71°F to 87°F. The hottest months are July and August, when temperatures can reach 94°F or higher. Thunderstorms are common during the summer months.

Fall in Granite City is generally cool with average temperatures ranging from 51°F to 72°F. The driest months are October and November, when rainfall is minimal.

Fast Facts About Granite City, IL

As of 2020, the city population is 28563.

Major Cities Nearby Granite City, IL

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Granite City, Illinois.