Planning for the weather is a good way to make your trip to Mestia relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 15°C, while the coldest months are January and February, with an average of -1°C. The rainiest months in Mestia are June, March, May and July, with each month seeing an average of 206 mm of rainfall.