The best time to visit Thornwood, New York, is during the late spring (May to June) and early autumn (September to October) when the weather is most pleasant.During late spring, Thornwood enjoys mild temperatures and blooming flora, making it ideal for outdoor activities and exploring the local parks and nature reserves. You'll find comfortable conditions for walks or enjoying a meal outdoors.Early autumn brings crisp air and the stunning colours of fall foliage to the Hudson Valley. This period is particularly good for scenic drives and visiting local farms for apple picking or pumpkin patches.