The best time to visit Allendale, Michigan, is typically during the late spring, summer, and early autumn months, from May to October, when the weather is most pleasant for outdoor activities.May and June offer mild temperatures, averaging between 15-25°C, making it ideal for exploring the local parks, such as the Allendale Township Park, or visiting nearby attractions without the peak summer crowds. This period is also excellent for enjoying the local farmers' markets.July and August are the warmest months, with temperatures often reaching 25-30°C. This is great for enjoying nearby Lake Michigan beaches, which are just a short drive away, or spending time at the Grand River. Families will find plenty of opportunities for outdoor fun, including kayaking or cycling on the local trails.September and October bring cooler temperatures, generally 10-20°C, and the stunning autumn foliage, particularly around the Grand Valley State University campus and along the Grand River.