If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Zephyrhills: The hottest months are usually August and July with an average temp of 81°F, while the coldest months are January and February with an average of 63°F. The rainiest months in Zephyrhills are August, July, June, and September, with each month seeing an average of 9 inches of rainfall.