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The Arboretum at Flagstaff
Arboretum in Coconino County, Arizona
Arboretum in Coconino County, Arizona

The Arboretum at Flagstaff is a 200 acre arboretum that is home to 750 species of mostly drought-tolerant adapted and native plants representative of the high-desert Colorado Plateau, home to the Grand Canyon and Zion National Park. It is located 3.8 mi south of U.S. Route 66 on Woody Mountain Road, on the west side of Flagstaff, Arizona, US. The facility is located at 7,150' in elevation, making it one of the highest-elevation public gardens in the United States. The Arboretum has an extensive regional collection of the Penstemon genus.
The Arboretum was originally forest and a working ranch, and the home of Frances McAllister in the late 1960s. She donated the land and created its financial endowment for the Arboretum in 1981. To support research the Arboretum is also home to the Merriam-Powell Research Station and Southwest Experimental Garden Array.
Climate
Flagstaff 4 SW is a weather station near The Arboretum. Flagstaff 4 SW has a dry-summer humid continental climate (Köppen Dsb) and is within the 5b USDA Hardiness Zone, with an average annual extreme minimum temperature of -13.8 °F (25.4 °C). |Jan record high F = 63 |Feb record high F = 70 |Mar record high F = 73 |Apr record high F = 80 |May record high F = 87 |Jun record high F = 94 |Jul record high F = 96 |Aug record high F = 93 |Sep record high F = 91 |Oct record high F = 81 |Nov record high F = 73 |Dec record high F = 66 |year record high F =
|Jan avg record high F = 56.7 |Feb avg record high F = 58.7 |Mar avg record high F = 64.8 |Apr avg record high F = 71.8 |May avg record high F = 78.9 |Jun avg record high F = 87.6 |Jul avg record high F = 90.1 |Aug avg record high F = 86.8 |Sep avg record high F = 82.4 |Oct avg record high F = 75.7 |Nov avg record high F = 66.5 |Dec avg record high F = 58.6 |year avg record high F = 91.0
|Jan avg record low F = -10.0 |Feb avg record low F = -4.8 |Mar avg record low F = 1.0 |Apr avg record low F = 10.8 |May avg record low F = 17.9 |Jun avg record low F = 24.9 |Jul avg record low F = 34.7 |Aug avg record low F = 36.4 |Sep avg record low F = 25.4 |Oct avg record low F = 14.0 |Nov avg record low F = 1.9 |Dec avg record low F = -7.9 |year avg record low F = -13.8
|Jan record low F = −28 |Feb record low F = −37 |Mar record low F = −18 |Apr record low F = -4 |May record low F = 8 |Jun record low F = 17 |Jul record low F = 25 |Aug record low F = 26 |Sep record low F = 18 |Oct record low F = -4 |Nov record low F = -19 |Dec record low F = −36 |year record low F =
|access-date = December 30, 2023 |access-date = December 30, 2023
References
References
- "Penstemon – Colorado Plateau, Arizona species".
- (2014-08-01). "Research Botanical Garden: The High Desert Arboretum at Flagstaff". Decoded Plants.
- "Data of Meteorological Station Flagstaff 4 Sw, Arizona". geographic.org.
- "Flagstaff, Arizona Hardiness Zones". Plantmaps.com.
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