If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Sado: The hottest months are usually August and July, with an average temperature of 23°C, while the coldest months are February and January, with an average of 5°C. The rainiest months in Sado are July, September, August and December, with each month seeing an average of 229 mm of rainfall.