But the rains are coming, and with them, mud, misery and water-borne disease. For shelter experts struggling to move as many earthquake survivors as possible into better housing before the start of the rainy season in April, it's a race against time.
"People have not yet begun to figure out what to do so they won't be as badly affected. They're just struggling to get by day to day now," said Isaac Boyd, a shelter expert with Baltimore-based Catholic Relief Services, who spoke via satellite phone from Port-au-Prince.
His plans call for CRS to find land, hire survivors to clear debris and build shelters for up to 40,000 households of five people each. They'll also have to build latrines to offer occupants some privacy and security, and to prevent the spread of disease.
"We're aiming to have all the transitional shelters built at the very latest by the end of June," said Boyd, who was dispatched to Haiti from Kenya, where he is based.
With hundreds of workers in Haiti and decades of experience in the country, CRS "should be able to get this ramped up rather quickly," he said.
Even the dry season isn't entirely dry. It just means that rain is less likely to fall, said Jack Beven, a senior specialist at the National Hurricane Center in Miami. Showers may drift through on trade winds or with a frontal system off the North American continent.
Since Boyd arrived in Haiti, he has seen some clouds gather. "People were maybe a little bit nervous about that," he said. But the rain held off, to the relief of survivors.
Boyd has no reliable statistics on the number of Haitians left homeless after the quake. But from his observations, he said, most are living outside their homes, either because the houses have been reduced to rubble or because they fear their homes are unsafe.
"There are lots and lots of spontaneous settlements that have sprung up in empty spaces between buildings and on unused lots," Boyd said. "People have salvaged materials from broken buildings - doorframes, iron sheets for roofs. They've cobbled those together and made walls out of things like bedsheets."
Most are no more than 7 feet square, he said.
"You can't really call it a shelter," Boyd said. "Most of them don't have a roof, or it's just a thin sheet. ... And if they're on a slope, they haven't dug any channels to prevent water from flowing into where they are."
"There are places like the one I'm driving by right now where 10 families have come together and set up spontaneous settlements ... up to, say, 7,000 or 8,000. Some are even larger," he said.
"When it rains, it's going to be a hazard," Boyd said. "First, it's going to be uncomfortable. And second, it's going to be a hazard, because people may get washed away."
Haiti is very hilly - its name is derived from the Taíno word for mountain - and the hills have been denuded by deforestation. That leaves them vulnerable to runoffs, flash floods and mudslides, Beven said.
Monthly average rainfall in Port-au-Prince doubles from 3 inches to 6 inches in April, then rises to more than 8.5 inches in May, according to the National Climatic Data Center. Monthly average rainfall in Baltimore is about 3.5 inches year-round.
The hurricane season in the Caribbean peaks from August to October, bringing an average of more than 6 inches of rain each month. It can be devastating.
In 2004, Hurricane Jeanne moved over the eastern part of the island Haiti shares with the Dominican Republic, then just north of Haiti itself - far enough away that the winds were not a serious issue there. But the rains were.
"We had a tremendous rain event near the town of Gonaives, and because of the flash flooding and mudslides near that town, we had 2,900 people die," Beven said. In 2008, four tropical cyclones in a span of just three weeks killed 500 to 800 people in Haiti.
In 2009, Haiti was spared any tropical systems. But that luck can't hold, either.
Boyd said CRS and other relief agencies are working to identify places where communities of transitional housing can be built and to secure permission from landowners and government officials to build housing designed to be occupied for two to five years.
"They can't be considered permanent because they're not bricks and mortar and concrete," he said. But they should be "adequate in terms of protection from the weather and providing security. They should also be fairly comfortable and safe, and they will not fall down."
Boyd said some shelter experts now in Haiti want to stop the flow of tents into the country because they are not very durable and require too much space for guy wires and pegs.