16 IOWA DEPARTMENT OP AGRICULTURE 



Tempeeature. — The monthly mean temperature for the state, as shown 

 by the records of 114 stations, was 65.8°, which is 2.1° above the normal 

 for Iowa. By sections the mean temperatures were as follows. Northern 

 section, 63.1°, which is 1.0° above the normal; Central section, 65.6°, which 

 is 2.0° above the normal. Southern section, 68.7°, which is 3.2° above the 

 normal. The highest monthly mean was 70.7°, at Bedford, Taylor County, 

 and the lowest monthly mean, 60.3°, at Estherville, Emmet County, and at 

 Sibley, Osceola County. The highest temperature reported was 103°, at 

 Ottumwa, "Wapello County, on the 1st; the lowest temperature reported was 

 32°, at Council Bluffs, Pottawattamie County, Inwood, Lyon County, and 

 at Washta, Cherokee County, on the 19th. The average of the monthly 

 maxima was 95°, and the average of the monthly minima was 40°, The 

 greatest daily range was 53°, at Bella, Marion County. The average of the 

 greatest daily ranges was 40°. 



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

 records of 121 stations, was 5.12 inches, which is 1.71 inches above the 

 normal. By sections the averages were as follows: Northern section, 3.90 

 inches, which is 0.49 inch above the normal; Central section, 5.23 inches, 

 which is 1.99 inches above the normal. Southern section 6,23 inches 

 which is 2.66 inches above the normal. The greatest amount, 13.73 inches, 

 occurred at Bloomfield, Davis County, and at Wapello, Louisa County, and 

 the least, 1.19 inches, at Logan, Harrison County. The greatest amount in 

 twenty-four hours, 7.00 inches, occurred at Bloomfield, Davis County, on 

 the 28th. Measurable precipitation occurred on an average of 10 days. 



Snow. — The only snowfall reported in the state was a trace at Elma, 

 Howard County, on the 24th. 



Sunshine and Cloudiness. — The average number of clear days was 11; 

 partly cloudy, 9 ; cloudy, 10. The duration of sunshine was below the nor- 

 mal, the percentage of the possible amount being 65 at Charles City; 50 at 

 Davenport; 55 at Des Moines; 53 at Dubuque; 50 at Keokuk; and 39 at 

 Sioux City. 



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

 41 miles per hour from the south, at Sioux City, Woodbury County, on the 

 22d. 



OCTOBER. 



As a whole, October, 1911, was cold and wet, yet there were no excep- 

 tionally cold or wet periods; and, notwithstanding the fact that the tem- 

 perature was below the normal much of the time, the first killing frost of 

 autumn did not occurr until 10 or 12 days after the average date of past 

 years which was due to an excessive amount of cloudy and foggy weather. 

 The first six days of the month were warm, with frequent and general 

 showers, the highest temperatures being recorded on the 3d. Most of the 

 rain fell in two general stormy periods, the first between the 1st and 7th, 

 and the second between the 12th and 16th. The last 15 days of the month 

 were colder than usual, but they gave more clear weather than obtained 

 during the early part of the month, and were favorable for drying out 

 the corn crop and for farm work. Killing frosts occurred in the extreme 



