Other facts from our historical weather data: When is winter in Overlook Athletic Club Heliport? The coldest season / winter is in the following months: January, February and December. Which is the warmest month in Overlook Athletic Club Heliport? 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 Overlook Athletic Club Heliport? The coldest month is January with an average maximum temperature of -2°C (28°F). Which is the wettest month in Overlook Athletic Club Heliport? July tops the wettest month list with 75mm (3 in) of rainfall. Which is the driest month in Overlook Athletic Club Heliport? June is the driest month with 21mm (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.