8 BULLETIN 836, U. S. DEPARTMENT OF AGRICULTURE. 
Humidity. 
The atmospheric humidity of this section is low on the average. 
It decreases and the wind velocity increases from the central part of 
Oklahoma westward. The usually low humidity at Woodward no 
doubt plays an important part in influencing transpiration from 
the growing crops. 
Tasie III.—\Jonthly climatic data, covering temperature and wind movement, 
recorded at the Woodicard (Okla.) Field Station in the sir months, April to 
September, inclusive, of each year during the 5-year period from 1914 to 
1918, inclusive. 
Temperature. Wind. 
Maximum. Minimum. | Highest day. 
Prevaii- | Monthly 
| Mean. | _ ing move- 
Read- Dates | ee: | Date. direction.| ment. | Move- Dats 
| S: oS >| 
Season and month 
ing | ment 
Season of 1914: Hi ison 73 Miles. | Miles. 
Rairilee = rk ee 23 57 96 | 16 24 8 N. 7, 344 440 | 21 
May sere eee ae 65 G2 10 40 a8} S. 6, 845 400 10 
Finesse yee sh 80 103 28 52 7 7, 920 463 | 7 
Wily. tower: oe 81 1066) «29 57 Cy Mieke 52 4,613 298 | 22 
AT SUSE eos eel 79 | 101 20}. 60 aii s. 4,835 | 316 | 2B 
September... ____..--- 74{ =: 100 | 10 | 40 30 Ss. 5,688 | 331 | 13 
Season of 1915: | | 
1G i111 Seen Pema: se 61 | 92 | 28 | 28 oe by Paes Se 6,768 | 481 4 
Misty oe ees ee 63 | 92 | 13 37 i foes 5,952] 413 25 
UHC ee oe 72 100 | 20 44 +o [presale 5, 544 351 il 
Ssiby sess e tena 3S 78 99 12 50 5 s. 5, 580 2 ae 
AMSUS(E He ee ee : 7: a9 | 17- 4] 31 E. 3, 050 189 7 
Seprembers= * = 5 72 | 99 | 10 5 27 Ss. 4,248. 302 13 
Season of 1916: 
Aprile. ai = tee ie 53 88} all 20 9| SW. 6,624) 445 | 19 
Many od ne eae 68 105 | 7 32 1] SW. 6,770} 446 10 
Sine. st eee eS 7 101 | 1 52 Bie aloe 5,976 | 478 22 
SHY ee ee eee 80| 103 19 55 Gh] aes: 4,241 235 2 
PAR CUSU ee ose eee 81 | 104 | a3 46 28; SW. 5, 506 | 287 10 
September........__.. 70 | 98 | 12 31 23} SW. 5, 904 | 381 27 
Season of 1917: j 
(Ripley 25-5) soe 55 91 22 23 2 | NW 8,237 | 507 16 
Mg yer estan” aie * | 60 98 17 30 8| SW. 6,653 | 475 17 
Sie ate ees 2 76 103 12 41 a2 s. 6, 720 495 il 
Seibyperen 2-3 ees 8 108 13 56 12| SW. 5, 597 300 | 29 
ANpUSies = oe eS 7 100 4 45 2) SE. 3, 774 234 | 5 
September...........- 71 102 7 36 27 SE. 3, 257 247 25 
Season of 1918: peg | 
Pile ee ee 51 $2 1 29 a10| NE. 5,678 360 | 14 
Maye esa eee 69 99 8 34 1|SE-SW 8,123 462 19 
ITN see hs eg 79 106 24 58 a] SW. 4,643 295 30 
Wilby es we ee 80 103 15 53 LeoSW 4,745 420 4 
TNT) ae pee api bees &4 105 a 3 50 31| _SW 4,680 262 | 6 
September............ 65| 102 15 34|  220| SW 3,874 | 266 24 
a Other dates also. 
Wind. 
Monthly data on wind are shown with other data in Table III 
for the crop season (April to September) in the 5-year period from 
1914 to 1918, inclusive. The wind velocity for the season averages 
high. Some days are calm; then there are other days when the 
wind moves at a very high velocity. The highest total movement 
for one day during that period was 507 miles, which occurred on 
April 16, 1917. This is an average of more than 21 miles an hour 
