A frost advisory has been issued for parts of Riverside County until 8 a.m. Wednesday with temperatures expected to drop to 31 degrees, according to the National Weather Service.
Riverside, Moreno Valley and Corona, in addition to the Inland Empire and valleys, will be affected by the frost advisory.
Frost can kill sensitive outdoor vegetation if left uncovered. The NWS recommends taking steps to protect tender plants from the cold.
Patchy frost is expected in colder, wind-sheltered areas Wednesday evening and Wednesday morning.