The Köppen climate region Bwh is described as the mid-latitude desert climate because the climate is found globally most often in latitudes between 15° and 30° and between -15° and -30°. It is also called a hot desert climate because temperatures can not only be extremely hot, sometimes greater than 130°F (40°C) but also the low temperatures are rarely below freezing. This is a dry climate where it rarely rains. For those of you who live here it should be noted that the A.R.T.S.® protocol provides supplemental irrigation equivalent to 1 inch of rainfall per week to the rose beds throughout the duration of the trial.
A.R.T.S.® is represented in the Bwh climate region by the following trial sites:
Tucson Botanical Garden
The following legacy partners have served as trial hosts in the past for this region:
Testing is still ongoing in the Bwh climate region and we have not yet made any award determinations. Stay tuned.