Other facts from our historical weather data: Which months have the greatest rainfall in Santa Cruz de la Sierra? Most rainfall (rainy season) is seen in January, February and December. Which is the warmest month in Santa Cruz de la Sierra? October has an average maximum temperature of 32°C (90°F) and is the warmest month of the year. Which is the coldest month in Santa Cruz de la Sierra? The coldest month is July with an average maximum temperature of 26°C (79°F). Which is the wettest month in Santa Cruz de la Sierra? January tops the wettest month list with 176mm (6.9 in) of rainfall. Which is the driest month in Santa Cruz de la Sierra? August is the driest month with 46mm (1.8 in) of precipitation. 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.