Colac has hottest day since Black Saturday Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Colac’s Ava Simpson, left, and Abbey Testa were keeping cool in their pool in Monday’s heat. The temperature reached 40 degrees Celsius around 4pm. Contact the authorby Kate Deppeler January 4, 2012 COLAC residents have sweltered through the hottest day since Black Saturday. Unlock full access to Colac Herald - Subscribe today! Subscribe Now Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window) Tags: Weather