Tree Selection for Higher Elevations - Forestry - Utah State University

Calculatedhardiness zones-43.6F (2b)-40.0F (2b)-36.4F (3a)-32.8F (3b)-29.2F (4a)-25.6F (4a)-22.0F (4b)-18.4F (5a)-14.8F (5b)-11.2F (5b)-7.6F (6a)-4.0F (6b)-0.4F (6b)+3.2F (7a)+6.8F (7b)+10.4F (8a)+14.0F (8a)+17.6F (8b)30 year average minimum temp(degrees F) (zone)(source www.nr.usu.edu/Geography-Department/utgeog/climate.html)