The best time to go to Bar Nunn is during the summer months, from June to August, or the shoulder seasons of late spring (May) and early autumn (September).Summer offers the warmest weather, with average daily temperatures ranging from 25°C to 30°C. This period is ideal for outdoor activities as the days are long and generally sunny. It's great for those looking to explore the nearby Casper Mountain, go fishing in the North Platte River, or enjoy the local parks without the chill of winter. Families planning a holiday will find the summer months most accommodating for a variety of activities.For travellers who prefer milder temperatures and fewer crowds, late spring and early autumn are excellent choices. May sees pleasant daytime temperatures around 15°C to 20°C, and the landscape is often green and fresh. September provides similar comfortable weather, with temperatures typically between 18°C and 23°C, and the changing autumn colours can be quite scenic.