Planning for the weather is a good way to make your trip to Cape Neddick relaxing and enjoyable, especially when you're splurging. The hottest months are usually July and August with an average temp of 67°F, while the coldest months are January and February with an average of 31°F. The snowiest months in Cape Neddick are January, February, March, and April, with each month seeing an average of 5 inches of snowfall.