Planning for the weather is a good way to make your trip to Muraoka relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 23°C, while the coldest months are January and February, with an average of 5°C. The rainiest months in Muraoka are July, September, August and June, with each month seeing an average of 298 mm of rainfall.