528 IOWA DEPARTMENT OF AGRICULTURE 



18th, injury having been greatest to tender vegetation and strawberries; 

 but in some districts tree fruits were reported to have been hurt. 



The heavy showers in the Southern counties greatly interfered with 

 the planting and cultivation of corn. At the close of the month a con- 

 siderable acreage remained unplanted, and much of the corn that was 

 up could not be cultivated. Fields, especially those on low ground, were 

 becoming weedy. On the other hand, the ample rainfall was favorable 

 for meadows and pastures. 



The month was marked by a number of severe storms. That of the 

 7th was characterized by wind and dust. At Dubuque a huge smoke 

 stack was blown down. On the afternoon of the 21st what probably 

 were small tornadoes swept over parts of Polk, Jasper and Marion counties. 

 A number of buildings were wrecked, but no persons were killed. The 

 damage was greatest at Pleasantville. On the night of the 26th-27th 

 a violent thunderstorm passed over Clinton, Iowa. Several houses were 

 struck by lightning, and the wind did much damage to trees. Large 

 hail, some of it as large as goose-eggs, was an accompaniment of thia 

 storm, and gardens suffered. 



Pressure. — The mean pressure (reduced to sea level) for the state 

 was 29.85 inches. The highest recorded was 30.30 inches, at Charles 

 City and Dubuque, on the 12th, and the lowest was 29.22, at Sioux City 

 on the 10th. The monthly range was 1.08 inches. 



Temperature.— The mean temperature for the state, as shown by the 

 records of 105 stations, was 59.9°, or 0.6° lower than the normal. By 

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

 lows: Northern, 58.3°, or 0.7° lower than the nonnal; Central, 60.2°, or 

 0.5° lower than the normal; Southern, 61.2°, or 0.5° lower than the nor- 

 mal. The highest 'monthly mean v,'as 62.8°, at Ottumwa, and the lowest 

 was 55.6°, at Estherville. The highest temperature reported was 94°, 

 at Clarinda, on the 6th, and at Logan, on the 25th, and the lowest was 

 27°, at Estherville, on the 2d. The temperature range for the state 

 was 67°. 



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

 76 per cent, and at 7 p. m. it was 56 per cent. The mean foir the 

 month, 66 per cent, is practically the normal. The highest monthly 

 mean was 70 per cent, at Charles City and Keokuk, and the lowest 

 was 65 per cent, at Des Moines, Dubuque, and Sioux City. 



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

 records of 111 stations was 4.93 inches, or 0.36 of an inch more than the 

 normal. Fy divisions the averages were as follows: Northern, 4.64 inches, 

 or 0.16 of an inch more than the normal; Central, 4.19 inches, or 0.40 of an 

 inch less than the normal; Southern, 5.97 inches, or 1.33 inches more 

 than the normal. The greatest amount, 10.44 inches, occurred at Bur- 

 lington, and the least, 2.14 inches, at Denison. The greatest amount 

 in 24 consecutive hours, 3.09 inches, occurred at Coming, on the 13th. 



Snovjfall. — The only measurable amount of snowfall was 0.1 of an 

 inch, at Inwood, on the 15th, hnt a trace occurred at eight stations in 

 extreme northern lawa,. on the 1st, 15th or 16th. 



