The best time to visit Flagler, Colorado, is during the late spring and early fall months, specifically May and September.
During May, the weather is pleasantly mild, making it ideal for outdoor activities before the peak summer heat arrives. The landscape is fresh with spring growth, and you'll find comfortable temperatures for exploring the town and surrounding plains.
September offers a similar experience with comfortable, cooler temperatures and often clear skies, great for enjoying the local attractions without the larger crowds of summer.