2 IOWA DEPARTMENT OF AGRICULTURE 



pressure observed was 29.14 inches, at Charles City, Floyd county on Jan- 

 uary 26th. The range for the state was 1.69 inches. 



Temperature. — The mean temperature for the state was 48.7°, which is 

 1.2° above the normal for the state. The highest annual mean was 52.9° 

 at Keokuk, Lee County; and at Ottumwa, Wapello County. The lowest 

 annual mean was 44.5° at Sibley, Osceola County. The highest tempera- 

 ture reported was 108° at Ridgeway, Winneshiek County, on July 16th. 

 The lowest temperature reported was — 35° at Elkader, Clayton County, 

 on January 7th. The range for the state was 143°. 



Precipitation. — The average amount of rain and melted snow for the 

 year as shown by the complete records of 111 stations was 20.03 inches, 

 which is 12.62 inches below the normal, and 19.98 inches below the 

 average amount in 1909. The greatest amount recorded at any station 

 during the year was 27.99 inches at Burlington, Des Moines county. The 

 least amount recorded was 12.11 inches, at Clear Lake, Cerro Gordo 

 county. The greatest monthly rainfall was 11.22 inches at Atlantic, Cass 

 County, in August. The least monthly precipitation was 0.00 at Audu- 

 bon, Audubon County, Little Sioux, Harrison County, Odebolt, Sac County, 

 •Rock Rapids, Lyon County, and at Zearing, Story County, in March. The 

 greatest amount in any twenty-four consecutive hours was 7.98 inches, 

 at Pacific Junction, Mills County, on the 28th and 29th of August. The 

 average amount of snowfall was 22.8 inches. The greatest amount of 

 snowfall, unmelted, at any station during the year was 52.5 inches at 

 Elkader, Clayton County. The least amount was 4.4 inches at Keokuk, 

 Lee County. The greatest monthly snowfall was 26.5 inches at Elkader, 

 Clayton County and at Humboldt, Humboldt County, in January; and 

 the greatest twenty-four hour snowfall was 14.7 inches, at Humboldt. 

 Humboldt, County on January 20th. Measurable precipitation occurred 

 on an average of 67 days. 



Wind. — The prevailing direction of the wind was northwest. The 

 highest velocity reported was at Sioux City, Woodbury County, 65 miles 

 an hour from the north, on April 23rd, and on August 2d. 



Sunshine and Cloudiness. — The average number of clear days was 188 ; 

 partly cloudy, 92; and, cloudy, 85; as against 152 clear days; 92 partly 

 cloudy; and 121 cloudy days in 1909. The duration of sunshine was as a 

 whole, slightly above tbe normal. 



