The best time to visit Northfield, Minnesota, is during the late spring, summer, and early fall months, from May through October, when the weather is most pleasant for outdoor activities and local events.For those who enjoy warm weather and outdoor recreation, the summer months of June, July, and August are ideal. The average temperatures range from the mid-70s to low 80s Fahrenheit, superb for exploring the Cannon River by kayak or enjoying the walking and biking trails around town. Many local festivals and farmers' markets also take place during this time, offering a lively experience.If you appreciate comfortable temperatures and colorful scenery, September and October offer a beautiful experience. The autumn foliage around the Cannon River and in the surrounding countryside is particularly striking. Temperatures are usually in the 50s and 60s Fahrenheit, which is excellent for exploring the historic downtown area and its unique shops and eateries.