SPRING – March, April, May
Note that due to the high elevation of this region, it is possible for daily temperatures to fluctuate 50 degrees at any time of year. In a high desert spring, you can expect warm days, cold nights, and possibly some rain. Spring storms could even bring heavy snowfall.
Pack a coat, plenty of layers, a rain jacket, hiking pants, hiking boots, and insulated hiking socks. Plan for daytime highs averaging 55ºF and lows averaging 30ºF. Temperatures fall below freezing every night.
SUMMER – June, July, August
Summer in the desert means monsoon season. Typically, days are pleasantly warm, but temperatures can still vary greatly due to the high elevation. Pack lightweight & moisture-wicking clothes, a rain jacket, hiking shorts, hiking shoes or sandals, moisture-wicking socks, rain boots, and a jacket or sweatshirt for those chilly nights. Daytime highs average around 80ºF and lows average around 50ºF.
FALL – September, October, November
September brings pleasant autumn daytime temperatures and cold nights. Beginning in October, nighttime temperatures will fall below freezing. Pack a coat, lots of layers, T-shirts, sweatshirts, insulated hiking pants, insulated hiking socks, hiking shoes or boots, and a rain jacket. Plan for daytime highs averaging 60ºF and lows averaging 30ºF.
WINTER – December, January, February
Winter is possibly the most dangerous time to visit the park. Expect below-freezing temperatures, snowstorms, and road closures due to weather. If you do decide to brave these hazards, pack a warm coat, lots of layers, a winter coat, hats, gloves, wool socks, and insulated hiking boots. Plan for highs averaging 35ºF and lows averaging 15ºF. Temperatures fall below freezing every night.