Other facts from our historical weather data: Which months have the greatest rainfall in Terre Haute? Most rainfall (rainy season) is seen in April and June. Which is the warmest month in Terre Haute? August has an average maximum temperature of 30°C (86°F) and is the warmest month of the year. Which is the coldest month in Terre Haute? The coldest month is February with an average maximum temperature of 3°C (37°F). Which is the wettest month in Terre Haute? June tops the wettest month list with 166mm (6.5 in) of rainfall. Which is the driest month in Terre Haute? August is the driest month with 63mm (2.5 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.