SEVENTEENTH ANNUAL YEAR BOOK— PART X 515 



ing the high temperatures iu July and August, the lowest temperi^ 

 ture of record for the first half of November and the excessive raiit- 

 fall over the northeastern counties on June 1, a report of which was 

 published in the Climatological Data for June. The summer, as a 

 whole, was droughty, and as a result the yield of all small grain 

 was lessened, late potatoes were practically ruined and corn and 

 pasturage were seriously damaged. The autumn was generally 

 pleasant and com husking began earlier than usual and was prac- 

 tically finished before the end of November. 



BAROMETER (reduced to sea level) — The average pressure of 

 the atmosphere for the year was 30.02 inches. The highest pressure 

 was 30.83 inches, at Omaha, Neb., on January 13th and February 

 13th. The lowest pressure was 29.13 inches, at Keokuk, on March 

 21st. The range for the state was 1.70 inches. 



TEMPERATURE— The mean temperature for the state was 

 47.2°, or 0.2° below the normal. The highest annual mean was 

 52.0°, at Keokuk, Lee county. The lowest annual mean was 42.2°, 

 at Estherville, Emmet county. The highest temperature reported 

 was 106°, at Webster City, on August 4th. The lowest temperature 

 reported was — 34°, at Inwood, on Januar^^ 13th. The range for 

 the state was 140°. 



PRECIPITATION— The average amount of rainfall and melted 

 snow for the year was 28.90 inches, or 3.07 inches less than the nor- 

 mal, and 10.63 inches less than the average for 1915. The greatest 

 amount at any station was 46.34 inches, at Nora Springs, Floyd 

 county, and the least amount was 22.21 inches, at Alta (near), 

 Buena Vista county. Omaha, Neb., had only 19.46 inches. The 

 greatest monthly precipitation was 10.44 inches, at Burlington, Des 

 Moines county, in May. The least amount was 0.05 inch, at Osage 

 in February, and at Matlock in November. The greatest amount in 

 any 24 consecutive hours was 4.46 inches, at Cedar Rapids, on June 

 1st. Measurable precipitation occurred on an average of 90 days, 

 13 days less than in 1915. 



SNOWFALL — The average amount of snowfall wa.s 29.5 inches. 

 The greatest amount reported from any station was 61.0 inches at 

 Northwood, Wortli county, and the least amount was 10.1 inches, at 

 Lenox, Taylor county. The greatest monthly snowfall was 18.5 

 inches, at Rockwell City, Calhoun county, in January. 



WIND — The prevailing direction of the wind was northwest. The 

 highest velocity reported was 70 miles an hour from the southwest 

 at Sioux City, Woodbuiy county, on August 6th. 



