If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Chiavari: The hottest months are usually August and July, with an average temperature of 22°C, while the coldest months are February and January, with an average of 9°C. The rainiest months in Chiavari are November, October, December and January, with each month seeing an average of 190 mm of rainfall.