Planning for the weather is an important factor for making your trip to Tachimata a success, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 20°C, while the coldest months are February and January, with an average of -2°C. The rainiest months in Tachimata are July, August, September and October, with each month seeing an average of 234 mm of rainfall.