Other facts from our historical weather data: Which is the warmest month in Salishan Beach? August has an average maximum temperature of 18°C (64°F) and is the warmest month of the year. Which is the coldest month in Salishan Beach? The coldest month is December with an average maximum temperature of 9°C (48°F). Which is the wettest month in Salishan Beach? December tops the wettest month list with 336mm (13.2 in) of rainfall. Which is the driest month in Salishan Beach? July is the driest month with 20mm (0.8 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.