The summer is hot and dry and the precipitation, which averages less than 8 cm (3.1 in) falls mainly in the winter in the form of unpredictable showers and as thunderstorms in spring. Dust storms can occur at any time of year but are more common in spring and summer. Average daily temperatures in the summer are around 43 °C (109 °F) while in winter they are 13 °C (55 °F), and there can be night frosts.[1]