The winter dry season extends from about December to mid-May, with temperatures ranging from the low 50s to upper 70s (12 to 25 degrees Celsius) and low humidity. Continental weather fronts occasionally bring near-freezing temperatures to south Florida. Often-breezy winter weather conditions can create a wind chill factor that makes perceived temperatures feel considerably cooler than what the thermometer reads. South Florida receives only about one quarter of its average yearly rainfall during the winter dry season. From late fall through early spring, continental cold fronts periodically plunge southeastward through the state, sweeping away any warm, humid air. Cool, dry air stabilizes the atmosphere, suppressing any showers and thunderstorms. Any rain associated with these frontal passages typically arrives in the form of squall lines that sweep through so quickly that they have little opportunity to drop substantial amounts of rain.