In terms of precipitation, rainfall in Grand Canyon National Park ranges from 0.0 - 0.8 inches per month. October is typically the wettest month, when rainfall can reach 0.8 in. June is typically the driest time to visit Grand Canyon National Park when rainfall is around 0.0 in.
If weather is an important factor for your trip to Grand Canyon National Park, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).