190 



THE CLIMATE OF CALVERT COUNTY 



critical examination. As, however, the observations at Solomons are 

 accurate, and truly represent the conditions prevailing during the period 

 which they cover, the original data will be used in the further discussion 

 of the climate of the place. 



The annual mean temperature at Solomons is 56.7°. The fluctua- 

 tions in the annual means have not exceeded 5°, the warmest year of 

 record being 1900, with a mean of 59.1° and the coldest, 1903, with 54.3°. 

 There is necessarily a far greater variation in the monthly mean tem- 

 peratures, especially during the season of greatest change, winter and 

 early spring, and these variations afford a valuable method of comparing 

 climatic conditions at different stations. The coldest month at Solo- 

 mons is February because, as already stated, this month was exceptionally 

 cold in 1895 (mean 27.4°), in 1899 (mean 28.9°), and in 1905 (mean 

 27.8°), while normally for this latitude January should be the coldest 

 month. The coldest weather experienced for any length of time at 

 Solomons occurred during January, 1893, the mean for that month being 

 only 26.2°. On the other hand January, 1894, was quite warm, 40.8°, 

 and the greatest range in monthly means, 14.6° is thus found for the 

 mid-winter month. The warmest month is July Avith a mean of 78.6°, 

 but it happens that the highest summer mean temperature occurred in 

 August, 1900, when it reached 82.7°. The fluctuations in the monthly 

 means during summer are much less than in winter, as indicated by the 

 mean anomalies at the bottom of Table VI, which are the averages of the 

 departures from the normal from month to month regardless of sign. 



A brief comparison between the mean annual range of temperature 

 at Solomons and other stations in Maryland will be of interest. 



stations Solomons. Sunnyside. Cumberland. Woodlawn. 



County Calvert. Garrett. Allegany. Cecil. 



Elevation, feet 20 2500 700 " 460 



Record 1S92-1905 1893-1901 1S59-1S95 1865-1875. 



Annual mean temp 56.7° 46.5° 51.5° 51.9° 



Highest monthly normal.. 78.6° .Tuly. 67.9° .July. 73.1° .Tuly. 75.8° July. 



Lowest monthly normal .. 33.8° Feby. 23.5° Feby. 30.8° Jany. 29.8° Jany. 



Range 44.8° 44.4° 42.3° " 46.0° 



Highest monthly mean of 



I'ecord 82.7 July. 71.4 July. 77.7 July. 79.4 July. 



Lowest monthly mean of 



I'ecord 26.2° .Tan. 13.5° Jan. 22.0° Feby. 23.1° Feby. 



Range 56.5° 57.9° 55.7° " 56.3° 



