Mar. 34,1923 
Summer Irrigation of Pima Cotton 
929 
Table I .—Average monthly maximum and minimum temperatures from March to Octo¬ 
ber, inclusive , Sacato'n, Ariz., from 1910 to 1919 
average maximum temperature (degrees Fahrenheit) 
Year. 
March. 
April. 
May. 
June. 
July. 
August. 
Septem¬ 
ber. 
October. 
1910 . 
1911 . 
1912 . 
. 
1 9 1 4 . 
1 9 1 5 . 
1916 . 
i 9 J 7 . 
I9l8. 
i 9 J 9 . 
Av. of 10 
years. 
87-3 
83-7 
72. 1 
73 - 2 
80. 0 
75-5 
84. 0 
73 - 7 
75 - 1 
70.5 
89.9 
86.2 
77-9 
87.8 
86.9 
84- 3 
87.4 
81. 6 
82. 4 
83- 7 
99.2 
94. O 
91.9 
93-8 
96. 0 
85. 6 
95 - 5 
86. 7 
87-5 
90.4 
104. 9 
103. I 
104. I 
100. O 
99 * 7 
103-9 
105.9 
103. 6 
101. 9 
100. 5 
106. I 
99-3 
101. 3 
103. 1 
103. 0 
105. 1 
105. 7 
102. 5 
IOO. 0 
97.6 
104. 5 
102.-8 
IOO. 2 
104. 3 
107. 0 
106. 0 
103.4 
99.9 
97.1 
99 - 5 
io 3 - 5 
98. 7 
97 - 7 
IOO. 0 
IOO. 0 
100. 4 
99-7 
95 - 6 
97-9 
92.9 
9 1 - 3 
»S- 7 
84- 5 
87 -S 
84.9 
95 - 5 
86.2 
9 1 - 3 
87.1 
80. 6 
77 - 5 
84.8 
92. 0 
102. 8 
102. 4 
102. 5 
98.6 
87 -S 
1920. 
7 i -4 
78.9 
91. 0 
99.0 
IO4. 5 
99.0 
95-3 
82. 6 
average minimum temperature (degrees Fahrenheit) 
Year. 
March. 
April. 
May. 
June. 
July. 
August. 
Septem¬ 
ber. 
October. 
40.4 
46.4 
44-3 
38.7 
44.2 
39 - 1 
45.6 
36. 7 
47 - 5 
38- 4 
5 °- 4 
48. 7 
46-3 
49.0 
48. 5 
49.4 
50. 6 
46.6 
47.6 
48.5 
57-3 
5 2 - S 
55-6 
56. 0 
5^-3 
5 2 - 1 
52. 6 
55-6 
53 - o 
57-4 
65- 4 
73 - S 
74.8 
70. 2 
5 2 -3 
tqto. 
1911. 
64. 6 
72. 7 
76. 2 
65.8 
52-3 
1912. ....... 
64. 9 
69. 5 
70. 8 
58. S 
53-4 
TQI'J. 
62. 7 
70. 6 
73 - 1 
64. 2 
48. 5 
X914. 
70. 2 
75 - 0 
76. 0 
65.0 
53-9 
IQIC. 
63. 6 
70. 0 
72. 0 
62. 6 
49.8 
1916 . 
63. 1 
73 - 3 
72.9 
66.2 
49. 1 
62. 6 
75 - 9 
69. 2 
68.0 
54-4 
1918 . 
70. 6 
73 - 2 
69.1 
65. 1 
52.5 
1010 . 
63. 2 
74. 0 
72.4 
66.8 
49. 6 
Av. of 10 
years. . .. 
42. 1 
48. 6 
54 - 8 
65. 1 
72. 8 
72. 7 
65. 2 
51.6 
1920. 
41. 2 
44 - 3 
53 - 2 
60. 4 
70.7 
70. 1 
61. 3 
48.6 
Table II .—Monthly precipitation, in inches, at Sacaton, Ariz., for an 8-month period 
from 1910 to 1919 compared with that for the year 1920 
Year. 
March. 
April. 
May. 
June. 
July. 
August. 
Septem¬ 
ber. 
October. 
0. 38 
•47 
2. 61 
1. 02 
1. 01 
• 7 i 
. 40 
1. 17 
•55 
Trace. 
..do .. 
.85 
.40 
. 16 
1. 16 
•45 
. II 
• 19 
. 20 
0. 65 
4. 11 
4.27 
•92 
3 - 25 
2.44 
1. 19 
3 - 33 
1.49 
3 - 76 
i- 45 
.82 
1. 02 
•73 
1. 77 
1. 05 
•63 
•05 
1. 92 
1. 63 
O. 15 
1. 40 
.96 
. 18 
2. 28 
. 02 
•29 
•15 
1910 . 
1911 . 
1912 . 
1913 . 
I 9 X 4 . 
1915 . 
1916 . 
1917 . 
1918 .. . • 
i 9 J 9 . 
Average. 
1920 . 
• 38 
. 10 
.69 
1. 29 
. 04 
Trace. 
.98 
•92 
•34 
. 10 
. 20 
Trace. 
i- 38 
.04 
• 3 ° 
3. 61 
•43 
1. 80 
• 83 
•35 
•25 
•25 
2. 54 
1. 11 
•75 
•54 
1. 42 
.03 .17 
•23 
.48 
.89 
. 21 
1. 21 
