If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Subic: The hottest months are usually May and April, with an average temperature of 28°C, while the coldest months are January and February, with an average of 26°C. The rainiest months in Subic are July, August, September and June, with each month seeing an average of 521 mm of rainfall.