If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Kobe: The hottest months are usually August and July with an average temp of 77°F, while the coldest months are January and February with an average of 45°F. The rainiest months in Kobe are July, September, June, and August, with each month seeing an average of 9 inches of rainfall.