542 IOWA DEPARTMENT OF AGRICULTURE 



Pressure — The mean pressure (reduced to sea level) for the State was 

 30.09 inches. The highest recorded was 30.64 inches at Sioux City on the 

 13th, and the lowes.t was 29.35 inches, at Davenport, on the 23rd. The 

 monthly range was 1.29 inches. 



Temperature — The mean temperature for the state, as shown by the 

 records of 108 stations, was 37.3°, or 3,3° above the normal. By divisions, 

 three tiers of counties to the division, the means were as follows: North- 

 ern, 34.2°, or 1.4° above normal; Central, 37.5°, or 2.3° above the normal; 

 Southern, 40.3°, or 3.0° above the normal. The highest monthly mean 

 was 44.0° at Keokuk and the lowest was 31.3° at Decorah. The highest 

 temperature reported was 80°, at Sigourney on the 7th; the lowest was 

 8° below zero, at Alton and Sibley on the 14th. The range for the state 

 was 88°. 



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

 records of 114 stations, was 1.61 inches, or 0.10 inch above the normal. 

 By divisions the averages were as follows: Northern, 1.42 inches, or 0.09 

 inch above the normal; Central, 1.47 inches, or 0.11 inch less than the 

 normal; Southern, 1.93 inches or 0.32 inch more than the normal. The 

 greatest amount, 3.65 inches, occurred at Onawa, and the least, 0.05 inch, 

 at Matlock. The greatest amount in 24 consecutive hO'urs, 2.25 incihes, 

 occurred at Bedford on the 8th. 



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

 79 per cent, and at 7 p. m. 70 per cent. The mean for the month was 

 74 per cent, or 3 per cent below the normal. The highest monthly mean 

 was 82 per cent, at Charles City, and the lowest, 68 per cent, at Des 

 Moines. 



Unow — The average fall for the whole state was 3.6 inches. The great- 

 est amount was 12 inches, at Northwood. 



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

 The highest velocity reported from a regular Weather Bureau station was 

 48 miles an hour from the south, at Sioux City on the 6th. 



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

 of sunshine was 56, or 4 per cent above the normal. The per cent of 

 the possible amount at the regular Weather Bureau stations was as 

 follows: Charles City, 67; Davenport, 61; Des Moines, 61; Dubuque, 50; 

 Keokuk, 67; Sioux City, 67. 



Miscellaneo'us Phenomena — Dates of: Fog: 20, 21, 22, 23, 28, 29; 

 Sleet: 11, 12; Thunderstorms: 7, 8. 



Rivers — Rivers remained nearly stationary and at a low stage during 

 the month. 



