Baltimore is entering the span in which it typically sees its hottest day of the year, according to U.S. climate data.
The National Climatic Data Center recently released a map showing what time of year the hottest days typically fall across the country, and in Maryland, it is around July 11-15.
The case is the same across the mid-Atlantic and in parts of the Midwest. That's because there is a lag between when the sun's heat hits the Northern Hemisphere the strongest, on the solstice June 21, and when that heat builds up the most, NCDC explains.
In other areas, like Texas, Arkansas and Louisiana, the hottest day of the year doesn't come until well into August. Areas along the Pacific coast are meanwhile hottest in late August, if not early September.
And parts of the Southwest, in Arizona, New Mexico and western Texas, peak in early June because of the North American Monsoon, a pattern that makes those areas cloudier and wetter from July through September.
Weather data for Baltimore somewhat bears out the July 11-15 trend, but not exactly. The hottest temperature on record here, 107 degrees, was recorded July 10, 1936, while some 104-degree records have been set in the days before and after that stretch.
The hottest temperature on record in Baltimore from July 11-15 was 102 degrees July 15, 1995.