Monclova
Overview
On the other hand, temperatures during late spring and summer can have bouts of extreme heat, with evenings above 40°C (104°F) for many consecutive days. In recent decades the hottest records have climbed as high as 43°C (111°F) on July 13, 2005 and 45°C (113°F) 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 10.6°C (51°F) in 1975.
 
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