I-55 Weather and Live Radar Updates. Check 12 hour weather, wind, and temperature forecast on the I-55 corridor. Check conditions hour by hour with the time slider, switch between weather, temperature and wind views, and watch live radar for the route.
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Along I-55, expect mostly cloudy to overcast skies with occasional chances of light rain in parts of Illinois and Mississippi. Winds will be notably strong in several areas, especially in southern Illinois and Missouri, with gusts frequently exceeding 20 mph. Temperatures remain mild with no extreme highs or lows forecasted.
