Weather is probably a major factor when you plan your trip to Robles, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and February with an average temp of 54°F, while the coldest months are August and January with an average of 54°F. The rainiest months in Robles are April, November, March, and May, with each month seeing an average of 8 inches of rainfall.