The space shuttle Endeavour, carrying six astronauts, touched down in Florida on Sunday evening despite some earlier weather concerns.

NASA said the shuttle landed safely at the Kennedy Space Center at 10:20 p.m. ET.

Earlier in the day, the agency had said rain and cloudy conditions there and at its backup landing site at Edwards Air Force Base in California might force it to postpone the landing. But the weather improved at the Kennedy Space Center as the day proceeded, making it acceptable for the landing, NASA said.

Astronauts George Zamka and Terry Virts were at Endeavour's controls as the shuttle made its glide to the Kennedy runway, the agency said.

The astronauts wrapped up a two-week mission that began Feb. 8 to deliver equipment and install a seven-window observation deck at the International Space Station, bringing the 11-year-old orbiting outpost to 98 per cent of completion.

There are four remaining shuttle flights to the space station scheduled, to stock the space station with more supplies, spare parts and experiments.

This was Endeavour's 10th trip to the space station.