The best time to visit Kansas City is April-October. Spring sometimes means rapid changes in weather, including sudden downpours and storms, but it can be more tolerable than summer for folks who don't like the heat and humidity. Summer temperatures are more even, with August being the hottest month (temperatures sometimes reach 100 F/38 C). Expect moderate to high humidity (52%-78%) as well. September's daily temperatures fluctuate between cooler autumn weather and warmer summer weather, though Indian summer (characterized by mild, sunny days and cool nights) can extend into October. Visitors are advised to check the forecast before arriving and to pack for both possibilities.
Winter temperatures run 19 to 43 F/-7 to 6 C, with occasional cold snaps when lows can drop to below 0 F/-18 C. January is the coldest month. Snow is possible November-April, but it usually doesn't linger on the ground for very long after late January.