Weather is probably a major factor when you plan your trip to Cerny Dul, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are January and February, with an average of -2°C. The snowiest months in Cerny Dul are December, November, January and February, with each month seeing an average of 15 cm of snowfall.