INTRODUCTION. 



23 



Precipita- 

 tion. 



Mean 

 temperat're 



January 



February 



March 



April 



May 



June 



July 



August 



September 



October 



November 



December 



9 35 

 2.71 

 5.04 

 3.H3 

 1.79 

 6.24 

 1.68 

 3.81 

 2.63 

 1.74 

 2.10 

 1.95 



42.1 

 39 6 

 40.6 

 56.1 

 65.1 

 74.0 

 80.1 

 76.2 

 67.3 

 54 9 

 41.0 

 23.4 



Total precipitation 

 Mean annual temperature 



42.39 in. 



The largest rainfall in 24 hours during 1876 was 2.60 inches. The 

 maximum heat for the year was 97, and greatest degree of cold 

 during the winter 1876-7 was (zero). 



Kainfall during the year commencing June 16, 1884, was as 

 follows : 



June .................................................................. 0.38 



July ................................................................... 2.05 



August ............................................................... 1.29 



September ........................................................... 5.35 



October ............................................................. 2.33 



November ............ .............................................. . 1.97 



December ............................................................ 7.59 



January .............................................................. 3.81 



February ............................................................. 1.48 



March ................................................................ 0.95 



April .................................................................. 1.69 



May ...................................................... 2.75 



June .................................................................. 3.59 



Total for the year ............................................... 35. 23 inches. 



Maximum precipitation during 24 hours in 1883 ........ 4.40 inches. 



Maximum precipitation during 24 hours from June 16, 



1884, to June 15, 1885 ............................. 2.09 inches. 



Maximum temperature for summer of 1884 ................. . . -f-98 



1885 .................... +98 



Minimum temperature for winter of 1883-4 .................. 25 



1834-5 ................... 15 



The following are a few of the unusually heavy rainfalls for 

 localities in Illinois as recorded in the report of the Chief Signal 

 Officer for 1880: 



Louisville: 2 inches in 5 hours (Jan. 2, 1880), 5 inches in 2 hours 

 (July 1, 1878). Peoria: 3.94 inches (May 8, 1880). Rock Island: 

 3.74 inches (June 1, 1880). Cairo: 3 inches in 90 minutes (June 

 27, 1879). Elmira: 3.29 inches in 1 hour 55 minutes (August 19, 

 1878.) Chicago: 4.14 inches (July 26, 1878). 



