Other facts from our historical weather data: When is the rainy season in Brookings? Rainy season in Brookings occurs in the months of January, February, March, April, November and December. Does Brookings have a dry season? Yes, the months of July and August are very dry. Which is the warmest month in Brookings? July has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in Brookings? The coldest month is December with an average maximum temperature of 12°C (54°F). Which is the wettest month in Brookings? December tops the wettest month list with 387mm (15.2 in) of rainfall. Which is the driest month in Brookings? July is the driest month with 12mm (0.5 in) of precipitation. Which is the sunniest month in Brookings? July is the sunniest month with an average of 387 hours of sunshine. 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.