On the other hand, temperatures during late spring and summer can have bouts of extreme heat, with evenings above for many consecutive days. In recent decades the hottest records have climbed as high as on July 13, 2005 and on May 4, 1984. However nighttime low temperatures are typically 15 degrees cooler than daytime highs, due to the very arid conditions. Even in July, the warmest month, temperatures have gotten as low as in 1975. The median temperature July is . A typical summer day has a low around and a high near .