Other facts from our historical weather data: Which months have the greatest rainfall in Cow Head? Most rainfall (rainy season) is seen in September, October and November. When is winter in Cow Head? The coldest season / winter is in the following months: January, February, March and December. Which is the warmest month in Cow Head? August has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Cow Head? The coldest month is February with an average maximum temperature of -3°C (27°F). Which is the wettest month in Cow Head? September tops the wettest month list with 170mm (6.7 in) of rainfall. Which is the driest month in Cow Head? April is the driest month with 107mm (4.2 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.