When flying from Phoenix to Mendoza, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
In terms of precipitation, rainfall in Mendoza ranges from 0.2 - 1.9 inches per month. January is typically the wettest month, when rainfall can reach 1.9 in. June is typically the driest time to visit Mendoza when rainfall is around 0.2 in.
If weather is an important factor for your trip to Mendoza, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 46.4 F).