Las Vegas only receives approximately 4.2 (110 mm) of annual rainfall, most of which occurs 26 to 27 days a year. Much of the rainfall in Las Vegas occurs in winter, with February being the wettest month with an average of 4 days of rain. You can see in the table that the months with the most rainy days on average are January, February and December. According to the table above, the wettest months in Las Vegas are December, January and February, with 0.49, 0.48 and 0.8 inches of rain respectively.
February receives the most rainfall, with 3 to 4 days (4.6 days to be exact) of substantial rainfall. This is relatively high compared to the average of 1 to 2 days of rain in other months from March to November. As clouds filled with moisture hit the mountains on their way to Las Vegas, they are forced to climb in height. Rainfall in Las Vegas is recorded in December, January and February, with February being the month with the most rainfall, with 0.8 inches.
Booking a room in Las Vegas can be confusing, as there are hundreds of hotels and resorts to choose from. There's so much to do in Las Vegas inside, it doesn't even matter if it's raining. Being a desert city that doesn't rain much means that Las Vegas doesn't have the drainage systems of other, more humid cities. Below is a table showing the average monthly temperature variations recorded over the years.
It can be easily seen that Las Vegas is not a paradise for rain. If you're planning to visit Las Vegas and you're worried that your trip will be ruined by rain, there's a good chance that it won't be a problem. The chance that you will see not a single drop of rain during your stay in Las Vegas is minimal or no most months of the year. Las Vegas is on the leeward (east) side of the mountain range that separates it from the Pacific Ocean and, as such, most of the rain that reaches Las Vegas is blocked by mountains.
The city of Las Vegas, Nevada, is surrounded by the Mojave Desert, which is the driest desert in North America. I have referred to the Las Vegas Valley several times so far and this is because Las Vegas is located in a valley surrounded by mountains on all sides. In Las Vegas, monsoon conditions occur when high-altitude clouds filled with moisture cross the mountains and reach the valley, where they collide with the very dry desert air above the city. If you get stuck in a monsoon storm while hiking, go to higher ground to avoid any flash flooding that may occur in low-lying areas.
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