A HISTORY OF HERTFORDSHIRE 



TABLE III 



SEASONAL RESULTS OF CLIMATOLOGICAL OBSERVATIONS, 1887-98 



TABLE IV 

 MONTHLY RESULTS OF CLIMATOLOGICAL OBSERVATIONS, 1887-98 



In dividing the year into seasons, March, April, and May are con- 

 sidered as spring ; June, July, and August as summer ; September, 

 October, and November as autumn ; and December, January, and 

 February as winter. 



Autumn is warmer than spring by 2*6, almost entirely owing to 

 the colder nights in spring, but the excess of temperature of summer 

 over that of winter is much more due to the warm days in summer than 

 to the cold nights in winter. Spring is 9 '4 warmer than winter, and 

 summer is 13 -6 warmer than spring; autumn is ii'o colder than 

 summer, and winter is i2 - o colder than autumn. Thus the transition 

 from spring to summer is the greatest, and that from winter to spring is 

 the least. Autumn and winter are much more humid than spring and 

 summer, but the rainfall is much greater in summer and autumn than it 



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