Las Vegas weather is usually quite nice with less than 45 days per year with rainfall. Summer temperatures soar to over 100 °F although it rarely feels this hot as the humidity is very low. As a precaution visitors are advised to drink plenty of water in the summer months (ice cubes don't count) particularly if you will be doing a lot of outdoor activities. Las Vegas is situated in a desert so the tendancy is for daytime temperatures to be high with the evenings cooling down rapidly. Sweaters or jackets are often required inside casinos in the summer months due to air conditioning. Although rare, Las Vegas has been known to have snow in the winter months but not in any quantity that last for more than a few hours. In the Grand Canyon, which is located about 300 miles from Las Vegas the temperatures are generally very pleasant but somewhat cooler. It is a good idea to take a light jacket when visiting the Grand Canyon as the temperatures can be chilly even in the summer months. Check the table below for the average temperatures for each month in Las Vegas.