The lowlands have very hot summers (30 °C to 33 °C during the day, or 86 °F to 91 °F) with warm nights in the north (18 °C, or 64 °F) and cooler evenings in the south (15 °C, 59 °F). Precipitation falls mainly as very scarce, but often severe thunderstorms that bring hail and high winds. Falls are pleasant and dry, and winters are cool with daytime highs around 14 °C (57 °F) and nighttime lows of 2 °C (35F). When Zonda winds blow downslope from the Andes, temperatures may soar to 30 °C (86 °F); however, Pampero winds can keep day temperatures below 5 °C (41 °F) and nighttime lows of −8 °C (18 °F) can be recorded. Snow is uncommon in the north, and occasional in the south.