Autumn
Fall is a fantastic season to visit the Midwest because the temperatures have cooled off, but the days are still long and sunny. The foliage will be changing colors, and the national parks are still fully open. Plus, prices and tourist numbers will be decreasing from the peak summer season.
You’ll want layers for the mornings and evenings, and in late-October and November, you’ll need warmer layers for the whole day.
In October, Chicago celebrates its version of Oktoberfest, so make sure you time your trip from some beer tasting!
Winter
Prepare yourself because Winter in the Midwest can be bitterly cold. But the region can also be stunning. You’ll have your pick of ski resorts and snow-blanketed cities. The Lake Superior sea caves turn into ice caves, and Chicago’s famous Christkindlmarket will be open in December.
Many National Parks have partial closing during these months due to weather conditions. So if there’s a specific trek or road trip you want to take, make sure the trails or roads will be accessible in Winter.
Spring
Spring sees the return of mild weather, sunny days, and the region’s famous wildflowers. Roads and trails will re-open, and as long as you avoid the peak Spring Break weeks from mid-March to early April, the crowds and prices will still be relatively low.
The weather can still be cold in the evenings and mornings in March and early April, so make sure you have layers.
Summer
Summer days are hot and sunny, and the nights are warm enough to camp out under the stars at the National parks.
But be aware that, like most places in the U.S., summer is the peak travel season because of school breaks, so crowds and prices will be at their highest.