The best time to visit Janov is during the summer months, from June to August, when the weather is warm and conducive to outdoor activities like hiking and biking.
During this period, you'll find pleasant temperatures, typically ranging from 20°C to 25°C (68°F to 77°F), making it ideal for exploring the Bohemian Switzerland National Park. The longer daylight hours also allow for extended enjoyment of the natural beauty, including the Pravčická Brána rock formation and the Kamenice Gorge. Travelers who enjoy nature and outdoor adventures will find this time most rewarding.
For those who prefer fewer crowds and cooler temperatures, late spring (May) or early autumn (September) are also excellent choices. The weather is still generally mild, and the landscapes offer beautiful colors, particularly in autumn.