Planning for the weather is a good way to make your trip to Umaji-mura relaxing and enjoyable, especially when you're splurging. The hottest months are usually August and July, with an average temperature of 25°C, while the coldest months are January and February, with an average of 10°C. The rainiest months in Umaji-mura are June, September, July and August, with each month seeing an average of 363 mm of rainfall.