Planning for the weather is a good way to make your trip to Jachymov relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July, with an average temperature of 14°C, while the coldest months are February and January, with an average of -2°C. The snowiest months in Jachymov are December, November, January and February, with each month seeing an average of 32 cm of snowfall.