EIGHTEENTH ANNUAL YEARi BOOK^PART IX 489 



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

 ern, 39.2°, or 6.4° above thei normal; Central, 40.8°, or 5.7° above the 

 normal; Southern, 42.0°, or 4.9^ above the normal. The highest monthly 

 mean was 45.8° at Omaha, Nebr., and the lowest was 36.3° at Elkader and 

 Estherville. The highest temperature reported was 77° at Indianola on 

 the 7th; the lowest was 3° at Whitten on the 24th. The range for the 

 state was 74°. 



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

 the records of 108 stations, was 0.28 inch, or 1.23 inches below the nor- 

 mal. By divisions the averages were as follows: Northern, 0.41 inch, or 

 1.00 inch below the normal; Central, 0.28 inch, or 1.25 inches less than 

 the normal; Southern, 0.14 inch, or 1.23 inches less than the normal. 

 The greatest amount, 1.02 inches, occurred at Sanborn, and the least, a 

 trace, at Chariton, Cumberland, Greenfield, and Maquoketa. The greatest 

 amount in 24 consecutive hours, 0.60 inch, occurred ac Rock Rapids on 

 the 21st. 



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



83 per cent, and at 7 p. m. 68 per cent. The mean for the month was 76 

 per cent, or 2 per cent above the normal. The highest monthly mean was 



84 per cent, at Charles City, and the lowest, 66 per cent, at Omaha, Nebr. 

 Snow. — The average fall for the whole State was 1.4 inches. The great- 

 est amount was 5.0 inches, at Sanborn. 



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

 The highest velocity reported from) a regular Weather Bureau station 

 was 50 miles an hour from the northwest, at Sioux City on the 21st. 



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

 of soinshine was 49, or 5 per cent below the normal. The per cent of the 

 possible amount at the regular Weather Bureau stations was as follows: 

 Charles City, 40; Davenport, 41; Des Moines, 53; Dubuque, 46; Keo- 

 kuk,' 49; Sioux City, 55, and Omaha, Nebr., 58. 



Miscellaneous Phenomena.— Fo^: 3d, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 

 13th, 14th, 15th, 16th, 20th, 24th, 25th, 26th, 27th, 28th, 29th, 30th. 



Glaze: 30. 



Haze: 4th, 5th, 7th, 9th, 10th, 11th, 14th, 15th, 16th, 17th, 18th. 

 Halos: (solar or lunar): 10th, 19th, 24th, 25th, 29th. 

 Sleet: 24th, 25th, 26th, 30th. 

 Thunderstorms : 9th, 10th, 11th, 21st. 



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

 the month. 



