Mount Lemmon
Mountain Sky island near Tucson with alpine recreation areas
Northeast of Tucson, Mount Lemmon rises along the Catalina Highway with cooler forests, an observatory, occasional winter snow and hiking and cycling routes popular with locals.
Mount Lemmon is the highest summit of the Santa Catalina Mountains in southern Arizona, rising to about 2,791 meters (9,157 feet). It sits northeast of Tucson and forms a prominent ‘sky island’ with cooler, forested slopes above the Sonoran Desert.
The mountain offers a rapid transition in ecosystems from desert at the base to pine forest near the top, with numerous hiking trails and campgrounds. A paved road reaches near the summit, providing access to the Mount Lemmon Observatory and a small seasonal ski area, so visitors include hikers, stargazers and seasonal winter-sport users.
The peak was named in honor of the botanist Sara Plummer Lemmon; the area has been used for recreation and scientific observation for many decades, including astronomical research at the observatory.
Mount Lemmon is located in the Santa Catalina range about 30 kilometers northeast of downtown Tucson, Arizona, rising sharply above the surrounding desert.
- Elevation: Summit elevation about 2,791 meters (roughly 9,157 feet), making it the highest point in the Santa Catalina Mountains and a classic 'sky island' environment.
- Access and facilities: A paved route (Catalina Highway) and the Mount Lemmon Observatory near the summit make it unusually accessible for a high-elevation desert range.
How to Get to Mount Lemmon #
Mount Lemmon is reached from Tucson via the Mount Lemmon Highway (Sky Island Scenic Byway/State Route 63). The road begins near the town of Oracle/Tucson and ascends to the summit area; the drive is approximately 45-60 minutes from central Tucson depending on traffic. The Tucson-area Coronado National Forest office can provide trail and road condition updates.
Tips for Visiting Mount Lemmon #
- Drive the Mount Lemmon Highway (Sky Island Scenic Byway) for a fast, spectacular ascent from Tucson.
- Stop at the Mount Lemmon Visitor Center and the small ski area (Mount Lemmon Ski Valley) - it's unexpectedly alpine.
- Bring layers: temperatures at the summit can be 30-40°F (15-20°C) cooler than Tucson.
Best Time to Visit Mount Lemmon #
Spring through autumn is best for accessing trails and scenic drives; winter brings cooler, sometimes snowy conditions on the summit.
Weather & Climate near Mount Lemmon #
Mount Lemmon's climate is classified as Warm-Summer Mediterranean - Warm-Summer Mediterranean climate with mild summers (peaking in July) and cold winters (coldest in January). Temperatures range from -4°C to 24°C. Moderate rainfall (811 mm/year).
January
January is the coolest month with highs of 6°C and lows of -4°C. Moderate rainfall (71 mm).
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February
February is cold with highs of 7°C and lows of -4°C. Moderate rainfall (60 mm).
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March
March is cold with highs of 9°C and lows of -3°C. Moderate rainfall (65 mm).
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April
April is cold with highs of 12°C and lows of 0°C. Light rainfall.
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May
May is cool with highs of 17°C and lows of 3°C. The driest month with just 15 mm.
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June
June is cool with highs of 22°C and lows of 8°C. Light rainfall.
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July
July is cool with highs of 24°C and lows of 11°C. The wettest month with heavy rain (141 mm).
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August
August is cool with highs of 22°C and lows of 10°C. Significant rainfall (136 mm).
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September
September is cool with highs of 21°C and lows of 9°C. Moderate rainfall (77 mm).
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October
October is cool with highs of 17°C and lows of 5°C. Moderate rainfall (59 mm).
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November
November is cold with highs of 12°C and lows of 0°C. Moderate rainfall (55 mm).
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December
December is cold with highs of 8°C and lows of -3°C. Regular rainfall (87 mm).
