Visiting local bars in Chiyoda is more fun in good weather. These temperatures and rainfall averages can help you determine the best time for bar hopping. The hottest months are usually August and July with an average temp of 76°F, while the coldest months are January and February with an average of 41°F. The rainiest months in Chiyoda are July, September, October, and June, with each month seeing an average of 8 inches of rainfall.