Precipitation totals are low, so year-to-year variations can be large. The passage of a few major storms can have a significant impact on the year’s total. Elevations: South Rim 7,000 feet (2100m) Average Annual Precipitation: 15.6 in. (39.6 cm) Total Precipitation in 2016: 22.4 in. (56.9 cm) Trail Rides, North Rim.