The best time to go to Pontiac, Illinois, is during the spring and fall months, specifically from April to May and September to October.These periods offer comfortable temperatures, typically ranging from the 50s to 70s Fahrenheit, which is ideal for exploring Pontiac's outdoor attractions like the murals and numerous historic buildings without the humidity of summer or the chill of winter. The pleasant weather makes walking around downtown and visiting the various museums a more enjoyable experience.For travelers interested in local events, the fall often features community festivals and car shows, which align well with Pontiac's Route 66 heritage. The autumn foliage also adds a scenic backdrop to the town's historic architecture, making it particularly appealing for couples looking for a relaxed getaway with picturesque surroundings.While summer can be warm, it's also a good time to visit if you plan to attend specific summer events.