41.   Moreover, a persistent trough over the East this spring has also maintained low air temperatures.

42.   Nearby water bodies keep the air temperature from easily falling below the water temperature.

43.   On Tuesday afternoon, a cold front arrived in western Pennsylvania after partial to full sunshine had boosted surface air temperatures to their maximums.

44.   Or maybe the tensions were bound to rise with the air temperature, despite implementation of our usual hot-weather emergency procedures.

45.   On this overcast day, the sprawling city is shrouded in thick clouds and the air temperature a bit too cold to linger at the top.

46.   Overnight, air temperatures plummeted, but rivers stayed warm.

47.   Patches of frost whitened the landscape across the interior Northeast early Saturday, even though the air temperature never fell to the freezing mark.

48.   Pilots can sometimes avoid leaving the trails by flying at lower altitudes where air temperatures are warmer.

49.   Residents say that pollution has raised the air temperature so that snows, which used to be knee-deep each winter, now rarely reach ankle height.

50.   Relative humidity is often highest near dawn when the air is coolest and lowest in the afternoon when air temperatures are highest.