If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Weno: The hottest months are usually November and September, with an average temperature of 28°C, while the coldest months are February and March, with an average of 28°C. The rainiest months in Weno are May, July, November and June, with each month seeing an average of 380 mm of rainfall.