SIXTH ANNUAL YEAR BOOK — PART II. 179 



Greatest daily range, 54°, at Massena; average of greatest daily ranges, 

 34.3°. Average precipitation for the state, as shown by records of 131 

 stations, was 2. 84 inches, which is 1.53 inches above normal. The aver- 

 ages by sections were as follows: Northern section, 3.16 inches, which 

 is 1.91 inches above normal; central section, 2.67 inches, which is 1.26 

 inches above normal; southern section, 2.58 inches, which is 1.40 inches 

 above normal. The largest amount reported was 5.30 inches at Plover; 

 least amount reported, .90 inch at Mt. Vernon. The greatest daily rain- 

 fall reported was 2.70 inches at Ft. Madison on the 23d. Prevailing 

 direction of the wind, northwest; highest velocity reported, 54 miles per 

 hour from the northwest, at Sioux City, on the 24th. Average number 

 of clear days, 16; partly cloudy, 7; cloudy, 7. 



December — The monthly mean temperature for the state, as shown 

 by records of 117 stations, was 27.0°, which is 4.0° above normal. By 

 sections the mean temperatures were as follows: Northern section 

 25.2°, which is 5.0° above normal; central section 26.9°, which is 3.8° 

 above normal; southern section 28.9°, which is 3.3° above normal. The 

 highest monthly mean was 32.4°, at Red Oak; lowest monthly mean, 

 22.8°, at Charles City. The highest temperature reported was 62°, ac 

 Jefferson on the 8th; lowest temperature reported was 11°, at Monti- 

 cello on the 23d and 24th. The average monthly maximum was 52.0°; 

 average monthly minimum, 3.1°. Greatest daily range, 53°, at De Soto; 

 average of greatest daily ranges, 36.0°. Average precipitation for the 

 state, as shown by records of 125 stations, was 0.52 inch, which is 0.73 

 of an inch below normal. The averages by sections were as follows: 

 Northern section, .40 inch, which is 0.65 inch below normal; central sec-' 

 tion, 0.63 inch, which is 0.71 inch below normal; southern section, 0.53 

 inch, which is 0.84 inch below normal. The largest amount reported was 

 1.69 inches at Ottumwa; least amount reported, trace, at Estherville 

 and Rock Rapids. The greatest daily rainfall reported was 1.27 inches 

 at Ottumwa on the 28th. Average number of days on which .01 of an 

 inch or more was reported, 3. Prevailing direction of the wind, north- 

 west; highest velocity reported, 37 miles per hour, from the northwest 

 at Sioux City on the 8th. Average number of clear days, 19; partly 

 cloudy, 6; cloudy, 6. 



