Climate Zones is used by the International Residential Code (IRC) and Model Energy Code. In winter, dry-cold air masses, unchallenged by any topographic barriers, periodically swing south from the northern plains and Canada. Building America determines building practices based on climate zones to achieve the most energy savings in a home. For example, if five successive winters reach respective minimum temperatures of −12 °C, −14 °C, −10 °C, −14 °C, and −13 °C, the mean coldest temperature is −12.6 °C. If they invade, reasonably humid air, snowfall and rainfall result. The northernmost area of the state is in the cold climate zone. Missouri has two different climate zones. Its position in the middle latitudes allows the area to be affected by warm moist air that originates in the Gulf of Mexico, as well as cold air masses that originate in Canada. Cold Hardiness zones are based on the average annual minimum temperature in a given area of the country, with USDA Zone 1 being the coldest at minus 50 degrees F and USDA Zone 13 the warmest at above 60 degrees F. Each of the map's colored zones is separated by 10 degrees. You can also view the Guide to Determining Climate Regions by County. If you want a shrub, perennial, or tree to survive and grow year after year, the plant must tolerate year-round conditions in your area, such as the lowest and highest temperatures and the amount and distribution of rainfall. Climate information for Columbia Missouri including average temperature, rain and snowfall totals That's why climate zone maps were created. US Climate Zone Map – DOE IRC CLICK TO ENLARGE The DOE map of U.S. A climate chart for your city, indicating the monthly high temperatures and rainfall. Zone maps are tools that show where various permanent landscape plants can adapt. September 2020 Weather and Its Impacts on Missouri Pat Guinan State Climatologist University of Missouri Extension. Missouri has a continental type of climate marked by strong seasonality. This page offers some general guidelines on the definitions of the various climate regions based on heating degree-days, average temperatures, and precipitation. St. Louis is located at the confluence of the Mississippi and Missouri Rivers, and near the geographical center of the US. The different zones on the map below are determined by averaging the lowest recorded temperatures of each winter season. Missouri has a continental climate, but with considerable local and regional variation. Climate in Missouri. Average temperatures and precipitation amounts for more than 153 cities in Missouri. Primary Sidebar The average annual temperature is 50°F (10°C) in the northwest, but about 60°F (16°C) in the southeast. 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