Plan you week with the help of our 10-day weather forecasts and weekend weather predictions for Ironton, Missouri . ... Partly cloudy. A chance of showers and thunderstorms. Hot. Lows in the mid 70s. Highs in the mid 90s. Chance of rain 30 percent. Heat index values up. Find the most detailed and reliable, present, past, and future Monthly Forecasts Calendars for all major Canadian cities with The Weather Network. A - A.