Planning for the weather is a good way to make your trip to Drammen relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and June, with an average temperature of 15°C, while the coldest months are January and February, with an average of -3°C. The snowiest months in Drammen are January, December, February and October, with each month seeing an average of 43 cm of snowfall.