If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Corpus Christi: The hottest months are usually January and February, with an average temperature of 26°C, while the coldest months are July and June, with an average of 17°C. The rainiest months in Corpus Christi are October, May, November and January, with each month seeing an average of 205 mm of rainfall.