Barnhart Weather Forecast

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Last Updated: December 21, 2025

Barnhart, Missouri has a humid subtropical climate with hot summers and cold winters.


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Summary

The area receives an average of 43 inches of rainfall annually, with the majority occurring in the spring and summer months. The Big River runs through Barnhart, providing ample opportunity for fishing, kayaking, and canoeing. The river is also a popular destination for camping and hiking, with several parks and trails in the area, including the Big River Trail and the Rockford Beach Park. The hydrology constituents in the area include the Big River, which is monitored for water quality, sediment, and flow by the Missouri Department of Natural Resources. Overall, Barnhart offers a variety of outdoor recreation opportunities for visitors and locals alike.

       

Weather Forecast

Barnhart receives approximately 1066mm of rain per year, with humidity levels near 84% and air temperatures averaging around 13°C. Barnhart has a plant hardyness factor of 6, meaning plants and agriculture in this region thrive during a short period during spring and early summer. Most plants will die off during the colder winter months.