Weather will likely play an important role when you plan your trip to Port Richey, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 28°C, while the coldest months are January and February, with an average of 17°C. The rainiest months in Port Richey are August, July, June and September, with each month seeing an average of 204 mm of rainfall.