If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Takasaki: 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 4°C. The rainiest months in Takasaki are July, September, October and June, with each month seeing an average of 208 mm of rainfall.