Medium to high desert of California and southern Nevada
This climate zone shares similarities with its neighbors—the cold-winter Zones 1, 2, and 3, and the subtropical low desert, Zone 13. Like Zones 1 to 3, Zone 11 has cold winters, and like Zone 13, it has hot summers. Hot summer days are followed by mild nights; near-freezing winter nights are followed by daytime temperatures near 60°F (16°C).On average, there are 110 summer days above 90°F (32°C),with the highest temperatures recorded between 111 and 117°F (44 to 47°C). About 85 nights have temperatures below 32°F (0°C),with lows between 11 and 0°F (–12 to –18°C). If soil moisture is inadequate, the characteristic winds and bright sunlight may combine to dry out normally hardy evergreen plants, killing or badly injuring them.