Planning for the weather is an important factor for making your trip to Ceahlau a success, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 17°C, while the coldest months are January and February, with an average of -1°C. The snowiest months in Ceahlau are January, April, November and December, with each month seeing an average of 13 cm of snowfall.