The umbrella canopy is nearly weightless, but the base that keeps it from blowing away is often the heaviest single thing on your patio. Treat them as two separate moving jobs and neither one gives you trouble.
Pro tip: Take a photo of how the ribs fold before you remove the umbrella from the base for the season, since incorrect refolding is the most common cause of a bent rib.
Watch out: A sand or water filled base can weigh well over 100 pounds full; always empty it before lifting rather than risking your back or dropping it on a foot.