Extended weather forecasts for Las Vegas, Nevada, can be found at Weather.gov, Accuweather.com and Weather.com. After bringing up the site, enter Las Vegas for the location, select the length of forecast desired, and it will be displayed.
All three of these websites provide information on what the weather is projected to be like in Las Vegas over a given time period. Weather.gov displays a seven day forecast, Weather.com provides a forecast for the following 10 days and Accuweather.com can give an extended forecast for up to 45 days in the future. In addition to the extended weather forecasts, these websites also provide useful information such as weather radar maps, average rainfall, special weather statements and average daily high and low temperatures.