192 THE CLIMATE OF CALVERT COUNTY 



Mean Daily Range in Tempekature at Solomons. 

 Jan. Feb. Mar. Apr. Maj' June July Aug. Sept. Oct. Nov. "Dec. Year 

 U.O 14.8 16.8 1,7.4 17.3 16.7 16.5 16.0 16.4 16.4 15.0 14.4 16.0 



Greatest Daily Ranges. 

 33 .S3 34 M 38 30 37 38 31 31 30 38 38 



Means of the Greatest Daily Ranges. 

 36.7 36.7 38.8 30.1 39.3 34.8 34.0 33.6* 35.5 27.6 34.9 36.8 26.6 



Greatest Absolute Range Each Month. 

 56 65 60 56 58 47 40 39 53 51 51 50 65 



Means of the Greatest Absolute Ranges. 

 46.4 50.6 50.6 49.4 44.6 38.7 34.1 32.5 43.6 44.9 45.3 45.6 89.9 



Absolute Range of Temperature. 

 63 74 67 60 59 50 43 45 56 54 57 55 108 



Extremes of Temperature; Duration of Warm Periods. 



With respect to the effect of temperature on vegetation it is to be 

 observed that the mean values have comparatively little importance; the 

 vegetative zones are fixed rather by the extremes to which the plant is 

 subjected, and especially by the lowest temperature of winter. From the 

 point of view of man's personal comfort the maximum temperatures of 

 summer are equally important, as in large cities at least, many deaths 

 by sunstroke are recorded annually. In the open country deaths by 

 excessive heat are uncommon because there is a freer movement of air 

 and less humidity. Tables VII and VIII give the absolute highest and 

 lowest temperatures observed, and Table XI the number of times the 

 maximum was above 90° and the minimum below 33°. It is a remark- 

 able fact that during the past decade the highest and lowest temperatures 

 recorded during a period of more than half a century were experienced. 

 The absolute extremes occurred at almost all stations in Maryland in 

 February, 1899, and in August, 1900. The maximum on record at 

 Solomons is 103° on August 12, 1900. A maximum of 100° has occurred 

 only three times, once in May, once in June, and in August. The lowest 

 temperature was 5° below zero on February 10, 1899. This gives an 

 absolute range for Solomons of 108°, which is less than in other portions 

 of the State. 



