160 IOWA DEPARTMENT OF AGRICULTURE. 



PART III. 



■REPORT OF THE IOWA WEATHER AND CROP 



SERVICE. 



John R. Sage, Director. 



METEOROLOGICAL SUMMARY FOR THE YEAR 1902. 



BAROMETER. The mean pressure for the year was 30.01 inches. 

 The highest observed pressure was 30.96 inches on January 28th at Du- 

 buque; lowest pressure 28.67 inches on February 28th at Davenport. 

 Range for the state, 2.29 inches. 



TEMPERATURE. The mean temperature for the state was 47.8 de- 

 grees which is 0.6 degrees above normal. The highest temperature re- 

 ported was 98 degrees on July 30th at Charles City. The lowest tempera- 

 ture reported was 31 degrees below zero on January 27th at Atlantic, 

 Range for the year, 129 degrees. 



PRECIPITATION. The average amount of rain and melted snow for 

 the year as shown by complete records of 99 stations was 44.31 inches, 

 which 14.01 inches above the normal, and 19.69 inches above the average 

 amount for 1901. The greatest amount recorded at any station for the year 

 was 58.80 inches at Columbus Junction; least amount recorded, 20.14 

 inches at Sioux City. The greatest monthly rainfall was 18.04 inches at 

 Grand Meadow, Clayton county, in May; least amount, a trace at Cresco, 

 Howard county, in March. The greatest amount in any consecutive 24 

 hours was 9.96 inches at Allerton, August 25th and 26th. The average 

 number of days on which .01 or more of rain fell was 100. 



WIND AND WEATHER. The prevailing direction of wind was 

 northwest. Highest velocity reported, 74 miles an hour in Sioux City, 

 from the north on April 25th. Average daily wind movement 211 miles. 

 There were 145 clear days, 109 partly cloudy, and 111 cloudy days. 



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

 by records at 112 stations, was 22.4 degrees, which is 5.3 degrees above 

 the January normal. By sections the means were as follows: Northern 

 section, 20.4 degrees; central section, 21.9 degrees; southern section, 24.8 

 degrees. The highest monthly mean was 27.5 degrees at Keokuk; lowest 

 monthly mean, 17.4 at Cresco. The highest temperature reported was 

 63 degrees at Pella, St. Charles and Thurman on the 7th and 8th; lowest 



