<prompt> Translate the following text to EnglishJoto la usiku huanguka chini ya kiwango cha baridi kali zaidi ya mwaka, wakati wastani wa joto la kila mwaka ni chini ya 10 C 50 F.  <response>: The overnight temperature plunges below freezing most of the year, while the average annual temperature is less than 10??C 50??F. 