624 IOWA DEPARTMENT OF AGRICULTURE 



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

 30.29 inches. The highest recorded was 30.87 inches, at Sioux City on 

 the 24th, and the lowest was 29.61 inches at Des Moines on the 16th. 

 The monthly range was 1.26 inches. 



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

 records of 99 stations, was 16.7°, or 1.2° lower than the normal. By 

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

 follows: Northern, 13.1°, or 1.5° lower than the normal; Central, 16.2°, 

 or 2.0° lower than the normal; Southern 20.8°, or 0.1° lower than the 

 normal. The highest monthly mean was 23.9°, at Glenwood and Thurman, 

 and the lowest monthly mean was 10.0° at Charles City. The highest 

 temperature reported was 58° at Thurman on the 29th, and the lowest 

 was -26° at Elkader on the 4th. The temperature range for the State 

 was 84°. 



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

 86 per cent and at 7 p. m., 77 per cent. The mean for the month was 

 82 per cent, which is just normal. The highest mean was 88 per cent at 

 Charles City, and the lowest, 72 per cent, at Keokuk. 



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

 records of 106 stations, was 0.42 inch, or 0.63 inch less than normal. By 

 divisions the averages were as follows: Northern, 0.46 inch, or 0.38 inch 

 less than the normal; Central, 0.41 inch, or 0.70 inch less than the nor- 

 mal; Southern, 0.40 inch, or 0.79 inch less than the normal. The greatest 

 amount, 1.05 inches, occurred at Northwood, and the least, a trace at 

 Denison, The greatest amount in any 24 consecutive hours, 0.64 inch, 

 occurred at Oskaloosa on the 24th. 



Snow. The average snowfall for the State was 4.6 inches, or 2.3 inches 

 below the normal. The greatest amount, 12.7 inches occurred at Forest 

 City, and the least, a trace at Denison. 



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

 The highest velocity reported from a regular Weather Bureau Station 

 was at the rate of 56 miles per hour from the northwest, at Sioux City, 

 on the 20th. 



Sunshine and Cloudiness. The average percentage of the possible 

 amount of sunshine was 47, or 3 per cent lower than the normal. The 

 percentage of the possible amount at the several regular Weather Bureau 

 Stations was as follows: Charles City, 40; Davenport, 54; Des Moines, 46; 

 Dubuque, 55; Keokuk, 51; Sioux City, 35; Omaha, Neb., 49. Clear days 

 average 12, partly cloudy 8, and cloudy 11. 



Miscellaneous Phenomena. Fog, dense: 6th, 9th, 15th, 16th, 20th, 

 22d, 25th, and 31st. Glaze: 15th. Hales, lunar: 1st, 2d, 7th, 11th, 22d, 26th, 

 28th. Halos, solar: 8th, 22d, 26th, 28th. Sleet: 6th, 15th, 16th, 22d, 23d. 



