164 



THE CLIMATE OF ST. MARY S COUNTY 



THE TEMPERATURE CONDITIONS. 



Attention has already been invited to the fact that the mean tem- 

 peratures for Charlotte Hall, during the period from 1893 to 1904 can- 

 not be considered as normal for the region ; they represent the conditions 

 prevailing during a period which careful examination shows to have 

 been deficient in temperature as compared with the true normal. The 



TABLE XV. 



Monthly and Annual Mean Temteratuiies at Charlotte Hall, Md., 1892-1905. 



deficiency resulted from the occurrence of several severe winters in rapid 

 succession, namely, in 1895, 1899, and 1904. 



The annual mean temperature at Charlotte Hall is 55.6°; this is 1.1° 

 lower than the mean for Solomons, which is farther south and nearer 

 the waters of the Bay. The variation in the monthly mean tempera- 

 tures is considerable. The coldest month is February, with a mean of 

 33.4° ; the warmest is July, with 77.0°, giving a mean annual range of 

 43.6°. February in 1895, 1899, and 1902 was very cold. The variations 

 in the monthly means during warm summers and cold winters are better 

 adapted to show the possible fluctuations in temperature in this region. 

 In August, 1900, the mean temperature at Charlotte Hall was 81.8°, 



