The best time to go to Lebanon, Kansas, is during the late spring (May to early June) and early autumn (September to October) when the weather is most pleasant.
During these months, you'll find comfortable temperatures, typically ranging from 15°C to 25°C, with less humidity than in the peak summer. This makes exploring the town and its surroundings, particularly the Geographic Center of the Contiguous United States monument, much more enjoyable. It's a great time for couples or solo travellers who appreciate comfortable conditions for road trips and outdoor photo opportunities.
Summer (July and August) can be quite hot and humid, with temperatures often exceeding 30°C. While all attractions remain open, the heat might make extended outdoor activities less appealing. For those who don't mind the heat, summer does offer longer daylight hours.
Winter (November to April) can be cold, with temperatures often dropping below freezing, and there's a chance of snow. While the monument is still accessible, outdoor exploration will require warm clothing.