THE CLIMATE OF TORONTO 



records, and shortly after this, in the spring of 1907, 

 the instruments were removed to a somewhat con- 

 fined area half a mile distant, where they remained 

 for eighteen months, until removed to the present 

 Observatory in September, 1909. During two years 

 prior to removal from the old site, comparisons were 

 made with thermometers placed at the site now occu- 

 pied, and very close agreement was found. In addi- 

 tion to this long series of observations at the Govern- 

 ment Observatory, there was an almost unbroken 

 series of observations by the Rev. Charles Dade, 

 between 1830 and 1839. 



The Toronto Observatory, in addition to being 

 the local meteorological observing station, is the 

 central office of the Dominion Meteorological Service, 

 whence are issued all weather forecasts and storm 

 warnings and also all Government bulletins and 

 reports, concerning the climatology of Canada. 



The mean annual temperature, as determined 

 from readings of the maximum and minimum ther- 

 mometers during 71 years' observations, is 44. 4. 

 The highest annual mean was 47. 2 in 1898, and the 

 lowest was 40.8 in 1895 a difference of 6.4. The 

 greatest difference between any two successive years 

 was 3. 8 in 1882-3, and the least was 0, in 1841-2. 

 The seasonal mean temperatures are: Winter, 



.4; Spring, 41.0; Summer, 6 5. 8; Autumn, 



'.5. 



There are some indications that the climate has 

 changed slightly with the gradual clearing away of 

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