Visiting local bars in Santa Maria is more fun when you know what the weather holds. These rainfall averages and temperatures can help you choose the best time for bar-hopping. The hottest months are usually January and December, with an average temperature of 23°C, while the coldest months are July and June, with an average of 13°C. The rainiest months in Santa Maria are January, February, December and March, with each month seeing an average of 179 mm of rainfall.