Las Vegas is located in a high desert area in Southern Nevada.  It is in a valley surrounded by many large, beautiful mountain ranges.  With close to 300 days of sunshine every year, over 200 of which are completely clear days, Las Vegas is known for it's good and yes sometimes hot weather. 

Here are the average monthly temperatures for Las Vegas

Month           High    Low

January         58ºF    33ºF

February        62ºF    36ºF

March            70ºF    44ºF

April              78ºF    51ºF

May               88ºF    60ºF

June             100ºF    69ºF

July              106ºF    77ºF

August          103ºF    75ºF

September      95ºF     67ºF

October          81ºF     54ºF

November       67ºF     42ºF

December       58ºF     35ºF