Supai Village experiences all different types of weather. For example, during peak tourist season (May-September), temperatures can soar to well over 100 degrees Fahrenheit while also dropping to low temperatures in the 50s. During the shoulder months, it will be cold and may even snow.
The water temperature is approximately 70 degrees all year long. Much of the trail is without consistent shade. Once you reach the Campground there is lots of shade and water to help keep you cool.
Please also be prepared for the summer Monsoon season (usually July through September) when there is an increased chance of rain and flash flooding. If you hear or see flood waters approaching, or if you are caught in a rainstorm, get to high ground immediately and wait until it clears.
Do NOT hike past the top of Mooney Falls or enter narrow parts of the canyon when it is raining or flooding.
You are responsible for packing appropriately to deal with varying temperatures and weather conditions.