Perhaps it was simply too warm during the day for them to come out before.

Several carry large 50-gallon plastic barrels full of water, which become warm during the day.

Much of the area receives snow in winter and is warm during the summer months.

The climate is warm with little variation during the year.

A high level of insulation was used to keep the building warm during the winter months.

But so far the weather has been warm and dry, at least during performances.

It was warm during the winter and cool in the summer.

It's possible to swim here, although the water is only likely to be warm enough during the summer months.

It was still warm during the day, and the sun came in over the trees of the forest outside the camp.

He'd gotten warm during the night in his sleeping bag, but now was cold again.

Nevertheless, some issues concern the lack of evidence for the trends and degree of warming during this interval.

A single wood-burning stove might warm such establishments during the winter months.

The heavy stone trapped coolness here, despite all attempts at warming the place during the winter months.

Sunlight warms the ground during the day which creates air currents that travel uphill.

He said that his five-year-old daughter could have written something better, but later warmed to the film during production.

It would be small, but enough to warm the tree during the long winter.

To warm itself during the day, the roadrunner exposes dark patches of skin on its back to the sun.

Measurements above the surface, but within the lower atmosphere, show warming during the last 20 years.

He thought that Rachel had been warming to him during the past few months.

In the end, they had resorted to chemical heat packs to warm themselves during the frigid night.