Winters are mild, with an average daytime high of in January. As a result of the high altitude and aridity during the winter months, the diurnal temperature range is large, resulting in cold nights, with an average low of in January). Frosts are common in winter. Occasionally, temperatures can go above while cold fronts from the north can push temperatures below . During the winter months, the climate is dominated by the subtropical ridge, resulting in dry conditions, with most days being clear and sunny. Precipitation is rare, with March being the driest month.