Other facts from our historical weather data: Which is the warmest month in Hammarstrand? July has an average maximum temperature of 21°C (70°F) and is the warmest month of the year. Which is the coldest month in Hammarstrand? The coldest month is February with an average maximum temperature of -3°C (27°F). Which is the wettest month in Hammarstrand? July tops the wettest month list with 100mm (3.9 in) of rainfall. Which is the driest month in Hammarstrand? March is the driest month with 37mm (1.5 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.