TUCSON, Ariz. (13 News) – As a ridge of high pressure builds in from the south, temperatures in Tucson will flirt with the triple-digit mark Saturday afternoon. It’s shaping up to be the hottest weekend of the year so far in southern Arizona! Gusty winds return Monday, as a weather system passes to our north. This system will cool temperatures down closer to climate normals starting Tuesday. Overnight lows will continue to cool into the 50s and 60s for most.