Weather

The park elevation goes from 5,124 feet at the entrance to 7,310 feet on Sugarloaf Mountain. The top of the park can be 5-10 degrees cooler and windier than the visitor center and entrance. The higher elevations generally have more sun exposure. Clothing layers are always recommended here. The park is often cooler than cities in Arizona with summer highs in the 80s and 90s. Winter lows are often near or below freezing.

 

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Live Air and Weather Monitoring

This live data comes directly from the park Entrance Station. Wind and dust storms or fire can impact air quality.
 

Historic Weather Information

Data was collected from the park’s official weather station located north of the Visitor Center; elevation 5,400 feet.
Month Max Temp Min Temp Record High Record Low Avg. Rain Avg. Snow
January 56° F (13 C) 30° F (-1 C) 80° F (27 C) -1° F (-18 C) 1.45" 3.41"
February 59° F (15 C) 31° F (0 C) 80° F (27 C) 7° F (-14 C) 1.21" 1.72"
March 65° F (18 C) 34° F (1 C) 86° F (30 C) 10° F (-12 C) 1.18" 1.74"
April 73° F (22 C) 39° F (4 C) 93° F (34 C) 21° F (-6 C) 0.51" 0.41"
May 81° F (27 C) 46° F (8 C) 100° F (38 C) 20° F (-7 C) 0.33" 0.00"
June 91° F (32 C) 55° F (13 C) 106° F (41 C) 23° F (-5 C) 0.84" 0.00"
July 89° F (32 C) 60° F (16 C) 105° F (40 C) 49° F (9 C) 3.98" 0.00"
August 86° F (30 C) 59° F (15 C) 103° F (39 C) 45° F (7 C) 4.16" 0.00"
September 83° F (28 C) 55° F (13 C) 99° F (37 C) 37° F (3 C) 1.76" 0.00"
October 75° F (24 C) 46° F (8 C) 93° F (34 C) 21° F (-6 C) 1.22" 0.07"
November 64° F (18 C) 36° F (2 C) 85° F (29 C) 8° F (-13 C) 1.05" 0.73"
December 57° F (13 C) 30° F (-1 C) 82° F (28 C) -1° F (-18 C) 1.61" 2.75"
 
snow plow in road surrounded by snow covered trees
Snowplow clearing the road in front of the Visitor Center in January of 2024. Snow like this happens 2 to 10 times a year.

NPS Photo/K. Hostetler

Winter Weather

The park can have snow, ice, rain, or warm weather conditions from November through April. Watch the forecast in advance of your visit and bring layers. Be prepared for icy and snow packed trails from January through March.

Snow is very unpredictable in the mountains so plan for surprises!

 
A dramatic storm forms outside of the park
A dramatic monsoon season storm develops in the valley to the west of the park.

Summer Monsoon Season: June 15 - September 30

The park can have severe thunderstorms, flash flooding, and lightning during the summer.

Remember: Turn around, don't drown! Often flash flooding can cause brief flooding of Hwy 186 between Willcox and the park. Heavy, sudden rains may require travellers to wait for water levels to drop.

Hwy 181 south of the park may have flooded washes for days or months depending on the season's cumulative rain.

If you are outside during a lightning storm, find shelter, stay low, and away from tall trees.

Wind

The mountains may have high winds at any time during the year. While the campground is nestled into a relatively calm, low spot, the hiking trails can be exposed to strong winds.

Last updated: October 17, 2026

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Contact Info

Mailing Address:

12856 E Rhyolite Creek Rd
Willcox, AZ 85643

Phone:

520 824-3560
The visitor center phone is staffed from 8:30 am to 4:30 pm daily. If we don't answer we may be helping others. Please leave a message with your phone number. We do not have caller ID. If calling while driving nearby, please pull over as cell reception will likely cut out.

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