Other facts from our historical weather data: When is summer in White Marsh?The hottest season / summer takes place in June, July, August and September. Which months have the greatest rainfall in White Marsh? Most rainfall (rainy season) is seen in June and October. Which is the warmest month in White Marsh? July has an average maximum temperature of 31°C (88°F) and is the warmest month of the year. Which is the coldest month in White Marsh? The coldest month is February with an average maximum temperature of 6°C (43°F). Which is the wettest month in White Marsh? June tops the wettest month list with 156mm (6.1 in) of rainfall. Which is the driest month in White Marsh? February is the driest month with 75mm (3 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.