18 IOWA DEPARTMENT OF AGRICULTURE 



monthly minimum was 30°. The greatest daily range was 47°, at Bedford. 

 The average of the greatest daily ranges was 34°. 



Precipitation. — The average precipitation for the State, as shown by 

 the records of 119 stations, was 3.98 inches, or 0.57 inch greater than the 

 normal. By sections the averages were as follows: Northern, 3.0-9 inches, 

 or 0.32 inch less than the normal; Central, 5.14 inches, or 1.90 inches more 

 than the normal; Southern, 3.70 inches, or 0.13 inch more than the normal. 

 The greatest monthly amount, 10.12 inches, occurred at Audubon, Audubon 

 County, and the least, 0.28 inch, at Centerville, Appanoose County. The 

 greatest amount in 24 consecutive hours, 4.10 inches, occurred at Guthrie 

 Center, Guthrie County, on the 2d. Measurable precipitation occurred on 

 an average of 11 days. 



Snow. — A trace of snow occurred at Marshalltown on the 18th, at North- 

 wood, on the 26th and at Storm Dake on the 17th. 



Sunshine and Cloudiness. — ^The average number of clear days was 12; 

 partly cloudy, 8; cloudy, 10. The duration of sunshine was somewhat less 

 than the normal, the percentage of the possible amount being 63 at Charles 

 City, 60 at Davenport, 52 at Des Moines, 58 at Dubuque, 63 at Keokuk 

 and 56 at Sioux City. 



Wind. — Southwest winds prevailed. The highest velocity reported was 

 40 miles an hour from the west, at Sioux City, Woodbury County, on the 

 5th. 



SEPTEMBER NORMALS FOR IOWA, 1890-1912. 



Normal temperature for September, 64.1°. 



Warmest September, 1897, with. mean temperature of 70.9°. 



Coldest September, 1896, with mean temperature of 58.5°. 



Normal September precipitation, 3.19 inches. 



Wettest September, 1911, with total precipitation of 5.12 inches. 



Driest September, 1899, with total precipitation of 0.93 inch. 



A trace of snow fell in the State during September, 1908, 1911 and 1912. 



Average number of days with 0.01 inch or more precipitation, 7. 



Prevailing direction of wind, south. 



Average number of clear days, 15; partly cloudy, 8; cloudy, 7. 



OCTOBER. 



October, 1912, was characterized by an unusually long period of fine 

 Indian summer weather during the latter half of the month; there being 

 only one storm period, of short duration during that time. The first half 

 of the month, how§ver, gave an excess of rainfall, but most of it came 

 during a few heavy showers, so the month, as a whole, was exceptionally 

 pleasant and favorable for farm operations and other out-door work. The 

 mean temperature was about normal, there being an excess of only 0.3°. 

 There was no very cold weather until the 23d, when freezing tempera- 

 tures occurred in all parts of the state, being the first killing frost in the 

 counties adjacent to the Mississippi River. Another and generally colder 

 period occurred near the close of the month; the lowest temperature at 

 most stations being recorded on the 30th. 



