560 



IOWA DEPARTMENT OF AGRICULTURE 



COMPARATIVE DATA FOR THE STATE— SEPTEMBER. 



YEAR 



1800. 



1891 



1892 



1893 



1894 



1895 



1896 



1897 



1898- 



1899 



1900 



1901 



1902 



1903 



VMi 



1905 



1906 



1907 



1918 



1909 



1910 



1911 



1912 



1913 



1914 



1915 



1916 



1017 



1918 



—0.39 

 —2.06 

 —1.83 

 —1.02 

 +0.21 

 —0.33 

 +0.73 

 —1.32 

 —0.67 

 —2.43 

 +1.62 

 + 1.41 

 +0.99 

 +0.45 

 —0.58 

 +0.45 

 +0.80 

 —1.61 

 —2.16 

 +0.22 

 +0.23 

 + 1.76 

 + 0.62 

 —0.05 

 +4.52 

 + 2.67 

 +0.53 

 —0.46 

 —1.49 



4.85 



3.60 



4.15 



5.49 



7.43 



7.43 



9.96 



5.88 



8.45 



4.32 



8.82 



13.62 



10.41 



8.79 



8.33 



13.18 



11.10 



6.06 



3.46 



7.34 



7.43 



13.73 



10.12 



7.44 



16.24 



12.45 



9.71 



8.68 



4.62 



1.36 

 0.13 

 0.16 

 0.74 

 0.67 

 0.85 

 1.82 

 0.00 

 0.41 

 T. 

 2.48 

 1.71 

 1.65 

 1.42 

 0.09 

 0.50 

 0.64 

 1.38 

 0.25 

 1.39 

 1.18 

 1.19 

 0.28 

 0.45 

 2.48 

 2.88 

 1.45 

 0.39 

 0.48 



T indicates an amount too small to measure, or less than .005 inch precipita- 

 tion, and less than .05 inch snowfall. 



OCTOBER. 



October was generally warm and pleasant, but with cool periods on the 

 1st, 24th-26th, and 30th-31st. From the 8th to the 17th the weather was 

 unusually warm. The first killing frost of the season occurred in the ex- 

 treme eastern counties on the 27th, the rest of the State having had 

 killing frosts in September. Precipitation was well distributed both as 

 to time and area but slightly below normal till a storm center of marked 

 intensity crossed the State from south to north on the 27th, causing heavy 

 to excessive rains, 26th-28th. In the northwest part of the State the pre- 

 cipitation on the 26th was largely in the form of snow. 



Corn dried out rapidly and husking and cribbing began early and pro- 

 gressed rapidly. A largely increased acreage of winter wheat in the 

 winter wheat sections of the State made excellent growth. Potato digging 

 was finished and the crop is generally small. 



An unusually brilliant aurora was observed during the night of the 8th- 

 9th at Oskaloosa and some other stations. 



Pressure. The mean pressure (reduced to sea level) for the State 

 was 30.03 inches. The highest recorded was 30.44 inches, at Dubuque, on 

 the 3d, and lowest was 29.17 inches at Des Moines, on the 27th. The 

 monthly range was 1.27 inches. 



