Other facts from our historical weather data: When is the rainy season in Santa Cruz? Rainy season in Santa Cruz occurs in the months of May, June, July, August, September and October. Does Santa Cruz have a dry season? Yes, the months of January, February and March are very dry. Which is the hottest month in Santa Cruz? April has an average maximum temperature of 36°C (97°F) and is the hottest month of the year. Which is the coolest month in Santa Cruz? The coolest month is December with an average maximum temperature of 31°C (88°F). Which is the wettest month in Santa Cruz? October tops the wettest month list with 365mm (14.4 in) of rainfall. Which is the driest month in Santa Cruz? January is the driest month with 7mm (0.3 in) of precipitation. Which is the sunniest month in Santa Cruz? March is the sunniest month with an average of 305 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.