. The climate and weather of Baltimore . ngin the aid of extra-terrestrial influences, such as the moon, the planets,or sun-spots. The Variability of Summer Temperatures. While marked temperature changes from day to day during the summermonths are not as frequent or as large as they are during the winter andspring seasons, there is still considerable variability due to the differenttypes of pressure distribution. W^ith a pronounced area of high pres-sure over the Upper Mississippi Valley and the Lake region the tem-peratures in the Middle Atlantic states fall below the seasonal average;with a
. The climate and weather of Baltimore . ngin the aid of extra-terrestrial influences, such as the moon, the planets,or sun-spots. The Variability of Summer Temperatures. While marked temperature changes from day to day during the summermonths are not as frequent or as large as they are during the winter andspring seasons, there is still considerable variability due to the differenttypes of pressure distribution. W^ith a pronounced area of high pres-sure over the Upper Mississippi Valley and the Lake region the tem-peratures in the Middle Atlantic states fall below the seasonal average;with a well developed high area over the South Atlantic states, or justoff the coast to the southeast, the temperatures over the Middle Atlanticand the Central states rise above the normal. These two types of pres-sure distribution, with resulting departures from the normal seasonaltemperatures, are well defined in the weather maps of July 1, 1885, andJuly 1, 1901. On the 1st of July, 1885, an area of high pressure cov- VOLUME 2, PLATE XXIV. /. Fig. 10.—Cold October, 1905 (—4*).
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