ELEVENTH ANNUAL YEAK BOOK PARTI 17 



Sunshine axd Cloudiness. — The average number of clear days was 

 15; partly cloudy, 10; cloudy, C. The duration of sunshine was slightly 

 below the normal, the percentage of the possible amount being 75 at 

 Charles City; 70 at Davenport; 60 at Des Moines; 54 at Dubuque; 63 at 

 Keokuk, and 74 at Sioux City. 



Wind. — South winds prevailed. The highest velocity reported was 65 

 miles per hour from Ihe north, at Sioux City. Woodbury County, on the 

 2d. 



SEPTEMBER. 



Although the mean temperature Avas below and the average rainfall 

 was above the normal, the month was very favorable for farm operations 

 and other outdoor pursuits and for maturing the late crops. 



The average temperature was only 0.5° below the normal, and the de- 

 ficiency was quite uniform over the state. The 17th was generally the 

 warmest day, when maximum temperatures of 90 c or above were recorded 

 at most stations over the southern half of the State. The highest recorded 

 during the month, 99°. occurred, however, at Creston on the 15th. The 2d. 

 5th, 7th, 11th, 18th and 30th were also warm days. The coolest days of 

 the month were the 9th, 10th and 27th. Light frost occurred at sev- 

 eral stations, on low ground, on the 9th and 10th, and heavy to killing 

 frost on the 27th. Freezing temperatures occurred at several stations 

 in the extreme western counties on the latter date, but no material dam- 

 age was done except to tender vines and garden truck as the low tem- 

 perature was of short duration and the corn was generally far enough 

 advanced toward maturity to escape injury. 



The precipitation was well distributed throughout the month and fairly 

 well distributed geographically although the largest amounts were re- 

 corded in the western, central and south central counties, and the heav- 

 iest showers occurred on the 15, 22, 23, or 26th, when excessive amounts 

 were recorded at several stations. The rains have revived pasturage and 

 aftermath in meadows, replenished the water supply for stock, put the 

 soil in fine condition for plowing and started the growth of fall sown 

 grain. Threshing was practically finished and more seed corn was gathered 

 than ever before during the month of September. There has been a de- 

 cided increase in the acreage sown to winter grains, especially fall wheat. 

 Fall pasturage is in excellent condition and much more than the usual 

 amount of corn has been cut for fodder and ensilage on account of the 

 shortage in the hay crop. Late potatoes were materially benefited by the 

 August and early September rains, but the crop will be short. 



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

 by the records of 113 stations, was 63.2°, which is 0.5° below the normal 

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

 section, 61.4°, which is 0.7° below the normal; Central section, 63.3°, 

 which is 0.3° below the normal; Southern section, 64 8°. which is 0.7° below 

 the normal. The highest monthly mean was 67.4°, at Ottumwa, Wapello 

 2 



