Weather-wise, depends. It all depends on what you have planned. You need to find out the starting and ending dates and hours for seasonal and recreational events. If you have a specific event you want to attend, knowing a scedule is a must. There are things going on all years long in Kansas City. This year they have had a wet Spring. Summers are usually hot and humid. Late Summer/early Fall is generally a good time to visit. There are even some great stuff going on in the winter months, but the weather is unpredictable.