IOWA WEATHER AND CROP REPORT 565 



month. Conditions were generally favorable for the usual outdoor activ- 

 ities and considerable building was in progress which was interrupted for 

 but short intervals. There was sufficient cold weather to make ice of the 

 desired thickness and by the close of the month a good harvest had been 

 complete-d under the most favorable conditions. The lack of snow cover, 

 the icy condition that followed the storm of the 4th-5th, and the alternate 

 freezing and thawing, later, are thought to have seriously injured winter 

 wheat and young clover over the southern and portions of the central divi- 

 sions. At the end of the month more than half the State was without 

 snow. Roads were in good condition, with sleighing nearly the entire 

 month over the northern division. The health of stock continued good. 



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

 was 30.20 inches. The highest recorded was 30.95 inches, at Dubuque, on 

 the 23rd and the lowest was 29.44 inches at Davenport, on the 4th. The 

 monthly range was 1.51 inches. 



Temperature. The mean temperature for the State, as shown by the 

 records of 97 stations, was 19.8°, or 1.9° higher than the normal. By 

 divisions, three tiers of counties to the division, the means were as fol- 

 lows: Northern, 15.6°, or 1.0° higher than the normal; Central, 20.5°, 

 or 2.3° higher than normal; Central, 20.5°, or 2.3° higher than normal; 

 Southern, 23.4°, or 2.5° higher than the normal. The highest monthly 

 mean 25.8° at Centerville, and the lowest monthly mean 13.2° at Charles 

 City. The highest temperature reported was 61°, at Harlan, on the 1st, 

 and the lowest was 29° at Charles City on the 6th and Mason City on the 

 24th. The temperature range for the State was 90°. 



Humidity. The average relative humidity for the State at 7 a. m. was 

 80 per cent and at 7 p. m. was 69 per cent. The mean for the month was 74 

 per cent, which is 8 per cent below the normal. The highest monthly 

 mean was 87 per cent, at Charles City, and the lowest was 66 per cent, at 

 Keokuk. 



Precipitation. The average precipatation for the State, as shown by the 

 records of 98 stations, was 0.89 inch, or 0.16 inch less than normal. By 

 divisions the averages were as follows: Northern, 0.88 inch, or 0.04 inch 

 more than normal; Central, 0.88 inch, or 0.23 inch less than the normal; 

 Southern, 0.92 inch, or 0.27 inch less than the normal. The greatest 

 amount, 2.30 inches, occurred at Rockwell City, and the least, 0.32 inch, at 

 Postville. The greatest amount in any 24 consecutive hours, 1.80 inches, 

 occurred at Mason City, on the 4th. 



Snowfall. The average snowfall for the State was 5.3 inches, or 1.6 

 inches less than the normal. The greatest amount, 23.0 inches, occurred 

 at Rockwell City, and the least a trace at Chariton and Pella. 



Wind. The prevailing direction of the wind was from the southeast. 

 The highest velocity reported from a regular Weather Bureau Station 

 was at the rate of 47 miles per hour, from the northwest, at Sioux City on 

 the 4th. 



Sunshine and Cloudiness. The average per cent of the possible amount 

 of sunshine was 63, or 13 per cent more than the normal. The per cent of 

 the possible amounts at the several Weather Bureau Stations was as fol- 



