What are the temperatures like in mid-late March for a visit to the Grand Canyon? Would like to take a ground tour, helicopter, and boat tour. We're planning to travel to Vegas for a few days and take a tour from there to the Grand Canyon. Would like to spend 2 days in the Grand Canyon if we can find a company that can accommodate us.

I go to this site for weather information.

http://www.weatherbase.com/weather/w...tes-of-America

March looks awfully cold for a boat tour. And would you want to hike all the way down and back up in those temps.

Why not just rent a car and drive to the canyon if the weather is fair. Getting lodging in March should not be a problem. You can spend as much time there as you want, check the park service web site for GC to find out what ranger programs are being planned for your time frame.

In any case if you decide to use a tour group, be sure to go to the National Park, not the west rim.

For national parks, I go directly to the park website for their weather information. There's a lot there and it gives a better picture than just temperature averages. In this case:
https://www.nps.gov/grca/planyourvis...-condition.htm

As far as the tours go, there are a lot of options but they all fall into a few major categories. You can fly by helicopter from Las Vegas (some of those will land at the West Rim and take a boat up/down river), you can get bused to Tusayan and take a different helicopter tour, or you can just do the bus tour to the South Rim.

I know there are some bus tours that stay overnight at the South Rim, but most don't. I don't believe there are any that stay there for 2 nights.

Grand Canyon is huge, and not all of it is a national park.

West Rim is not the national park. It is tribal land.

Helicopters do not fly over the national park.

The boat tours are brief, generally start from the West Rim, and don't enter the main national park area.

There are rafting trips that go into the national park but they are a minimum of 3 days, most are a week or longer. Those require you to either hike in or hike out. The only one day rafting trip that I know of starts near Page and doesn't require any hiking, but it is all smooth/flat water and probably not at all what you are looking for.