METEOROLOGICAL OBSERVATIONS— 1855. 



BY L. •WOODRUFF, ANN ARBOR, MICHIGAN. 



Mean 

 Temperature. 



7 A. M.12P. M.|9P. M. gH 



Amount of 



Rain and 



Melted 



Snow. 



January, ... 

 February, .. 



March, 



April, 



May, 



June, 



July, 



August, 



September, . 



October, 



November,.. 

 December,-. 



Annual 



means and 



totals. 



3.80 



2300 



2.360 



5.910 



0.963 



7.089 



8.740 



1.504 



5.265 



2166 



5.398 



3.948 



41.5 



53.1 



45.1 



46.'; 



140 



26 183 134 



61 68 49.028 



The average annual precipitation at Ann Arbor, is about 30 inches. 



WINDS. 



w. 



N. 



S. 



s. w. 



N. W. N. E. 



S. E. 



January, . . . 

 February, .. 



March, 



April, 



May, 



June, 



July, 



August, 



September,. 



October, 



November, . 

 December . . 



11 

 6 



13 

 9 

 4 

 6 

 8 

 4 

 8 

 6 

 8 



10 



3 

 8 

 6 

 6 

 

 9 

 2 

 3 

 1 



11 

 4 

 1 





 14 

 1 

 8 

 5 

 4 

 

 2 

 4 



7 

 

 2 



7 

 3 

 1 

 2 

 7 

 4 

 2 

 8 

 3 



Frost, April 7th, 

 21st, 27th, and 28th 

 Mny 5th, 6th, 10th, 

 17th, 25th, 26th & 

 27th. Last snow in 

 spring, May 7th. 



First killing frost 

 in fall, Oct. 13th. 



First snow of the 

 season, Oct. 6th. 



Totals, I 33 I 30 I 20 I 38 I 93 | 54 | 42 



46 



January. — The first few days of the month were quite warm for the 

 season, the temperature on several days rising to GO deg. There was a 



54 



