Planning for the weather is a good way to make your trip to Moriguchi 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 6°C. The rainiest months in Moriguchi are July, June, September and October, with each month seeing an average of 192 mm of rainfall.