Other facts from our historical weather data: Which is the warmest month in Strahan? February has an average maximum temperature of 19°C (66°F) and is the warmest month of the year. Which is the coldest month in Strahan? The coldest month is August with an average maximum temperature of 12°C (54°F). Which is the wettest month in Strahan? August tops the wettest month list with 264mm (10.4 in) of rainfall. Which is the driest month in Strahan? February is the driest month with 106mm (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.