8 BULLETIN 402, U. S. DEPARTMENT OF AGRICULTURE. 
WIND. 
Wind is an important element of the climatic influences in this 
section of the Great Plains. Records of wind velocity have been 
made during the summer months since 1908 and during the entire 
year since 1912. The available records for the 8-year period, 1908 
to 1915, inclusive, as given in Table V, show an average wind velocity 
of 6.9 miles per hour. The months of April and May have average — 
wind velocities higher than any of the other months. The highest 
wind velocity for any one month is 10.3 miles per hour, in May, 1909. 
The lowest wind velocity was recorded in August, 1915. The pre- 
vailing winds at the Akron Field Station are from the southwest 
during the summer and from the northwest during the winter. 
TABLE V.—Average wind velocity at the Akron Field Station, Akron, Colo., by months, 
1908 to 1915, inclusive, as far as data are available. 
[Data (in miles per hour) from the records of the Biophysical Laboratory of the Bureau of Plant Industry.] 
Year. ‘| Jan. | Feb. Mar. | Apr. | May. | June.| July.) Aug. | Sept.) Oct. oe Dec. a 
AOR ee oe | me ae eel er ele eee SNE S20 Nh 6hOM 06.70 asGel eee ee & [ace 
QUQE ee ae ene |e ee le ee ce eae [2051.40.31 © 6:8. |G: Se) | Se Se| Ga Tal ce ce | ees alee een aa 
Cy (eee aN “Sates = EN OR Sie) SEB artes Soilal oS Gal paordal ch Oil G0 ered 5.1 | 6.3 | pe 
1 Oia) es et ease 6:2: 1.6.5] 8.7) 29.0 F209") 7. 4 eee |i 7 Oe ee eee 
1015, SS ee 6:71 97.5. 78 | 919 [28.5 | 6.0: 47 | 6109) Gly 527 | essa ewe 
1013 ee 6.2 | 4.9)|- 626) | 8. Ef 6.9 8.171261 |) 556.5 644 714 25.148 oe eee 
A918 Sr ee 8.2) 66) 85) 87) 74] 5.8] 5.8] 65] 69) 64) 62) 5.8] 6.9 
TE eben ape alee 8.01 6.54073 17.51 F-26284) 62 | Ac3|. 64d 15.7 a7) ls eee 
Average....... 750) bed eran las vel 8 oleae 6.2 5.8 | 6.6 6.9| 6.0) 66] 6.7 
| | 
TEMPERATURE. 
The temperatures at the Akron Field Station are recorded by means 
of maximum and minimum dry-bulb thermometers, supplemented by a 
thermograph during the growing season. A summary of the recorded 
data is given in Table VI. The records are complete for the six 
months from April to September, inclusive, for the 8-year period, 
1908 to 1915. Sufficient data are available for other months during 
a portion of this period to form a good basis for study. 
The month of August has the highest average maximum tempera- 
ture, 85° F. December and January have the lowest average mini- 
mum, 13° F. The highest maximum for any one month is 90° F., 
recorded for July, 1910. ‘Temperatures of 100° F. are not uncommon 
during July and August. The combination of high winds and high 
temperatures with only light showers usually causes a droughty 
condition to prevail from about June 15 to August 31, as noted in the 
discussion of precipitation. 
