Weather will likely play an important role when you plan your trip to Natonin, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and April with an average temp of 73°F, while the coldest months are January and February with an average of 67°F. The rainiest months in Natonin are July, August, May, and June, with each month seeing an average of 25 inches of rainfall.