When to go
June is the driest month, July and August the wettest. January has average overnight lows of 13°F (-11°C) to 20°F (-7°C) and daytime highs around 40°F (4°C). Summer temperatures inside the canyon regularly soar above 100°F (38°C). While the South Rim is open year-round, most visitors come between late May and early September. The North Rim is open from mid-May to mid-October.