28 
IOWA DEPARTMENT OF AGRICULTURE 
33.4° at Keokuk, Lee county, and the lowest monthly mean was 19.5° at 
Northwood, Worth county. The highest temperature reported was 67° 
at Washington, Washington county, on the 14th; the lowest tempera- 
ture reported was 17° below zero at Alton, Sioux county, and Dows, 
Wright county, on the 7th. The average monthly maximum was 52.2°, 
and the average monthly minimum was 8.9° below zero. The greatest 
daily range was 50° at Carroll, Carroll county. The average of the 
greatest daily ranges was 34.2°. 
Peecipitation. — The average precipitation for the State, as shown 
by the records of 120 stations, was .57 inch, which is .62 inch below 
the normal. By sections the averages were as follows: Northern sec- 
tion, .93 inch, which is .10 inch below the normal; Central section, .46 
of an inch, which is .74 inch below the normal; Southern section, .33 
inch, which is 1.00 inch below the normal. The greatest amount, 2.07 
inches, occurred at Ridgeway, Winneshiek county, and the least, .05 
inch, at Greenfield, Adair county, and Whitten, Hardin county. The 
greatest amount in twenty-four hours, 1.18 inch, occurred at Osage, 
Mitchell county, on the 16th. 
The average snow fall, unmelted, was 3.8 inches. By sections, the 
averages were as follows: Northern section, 4.3 inches; Central sec- 
tion, 4.0 inches; Southern section, 3.1 inches. The greatest monthly 
snowfall, 8.4 inches, occurred at Inwood, Lyons county, and the great- 
est amount in twenty-four hours, 7.0 inches, at Belle Plaine, Ben- 
ton county, on the 6th. Measurable precipitation occurred on an average 
of 3 days. 
Sunshine and Cloudiness. — The average number of clear days was 
15; partly cloudy, 8; cloudy, 8. The duration of sunshine was generally 
above the normal, the percentage of the possible amount being 62 at 
Charles City, 49 at Davenport, 60 at Des Moines, 44 at Dubuque, 53 at 
Keokuk, 54 at Sioux City, and 61 at Omaha, Neb. 
Wind. — Northwest winds prevailed. The highest velocity reported 
was 50 miles per hour from the northwest at Sioux City, Woodbury 
county, on the 30th. 
AVERAGE DATES OF LAST KILLING FROST IN SPRING AND 
FIRST IN AUTUMN, IN IOWA. 
1 
Oar, 
FROST 
Station 
Average Date of 
Date of 
First 
Killing 
m 
Autumn 
Last 
in 
Spring 
Earliest 
Killing 
in 
Autumn 
Latest 
In 
Spring 
Charles City 
17 
35 
31 
35 
37 
38 
19 
Sept. 26 
Oct. 13 
Oct. 10 
Oct. 13 
Oct. 15 
Oct. 12 
Sept. 27 
May 16 
April 22 
April 22 
April 21 
April 11 
April 16 
May i 
Sept. 12 
Sept. 18 
Sept. 13 
Sept. 27 
Sept. 18 
Sept 18 
Sept. 13 
May 29 
May 22 
May 22 
May 21 
May 4 
May 19 
May 21 
Davenport 
Des Moines 
Dubuque 
Keokuk 
Omaha, Nebraska 
Sioux City 
