The best times to visit Bellevue are during the late spring (May to early June) and early fall (September to October) when the weather is most pleasant.During late spring, temperatures are mild, typically ranging from the 60s to 70s Fahrenheit, with blooming flowers and lush greenery. This period is ideal for outdoor activities at Fontenelle Forest, where you can enjoy hiking and birdwatching without the intense heat of summer. It's also a good time to explore attractions like the Strategic Air Command & Aerospace Museum, as the comfortable weather makes traveling to and from the museum more enjoyable.Early fall offers similar comfortable temperatures, usually in the 60s and 70s, with lower humidity and colorful foliage. It's an excellent time for couples to visit, as they can enjoy scenic drives along the Missouri River or a relaxed afternoon at a local winery. The cooler evenings are also pleasant for dining outdoors in Olde Towne Bellevue, which features historic buildings and local eateries.While summer is also an option, it can be quite hot and humid, with temperatures frequently in the 80s and 90s, making outdoor activities less comfortable.