CEREAL EXPEEIMEN-TS OlsT THE CHEYENNE EXPERIMENT FARM, 7 



TEMPERATURE. 



The maximum, minimum, and mean temperatures for tlie four 

 months, April to July, of each year during the 16-year period from 

 1900 to 1915, mclusive, are shown in Table IV. The highest tem- 

 perature recorded during the entire period was 95° F. and the lowest 

 4° F. The summers are not extremely hot and the nights are always 

 cool. 



Table IV. — Maximum, minimum, and mean temperatures at Cheyenne, Wyo., by months, 

 from April to July of each year, for the 16-year period, 1900 to 1915, inclusive. 



[Data (in ° F.) from the records of the United States Weather Bureau.] 





April. 



May. 



June. 



July. 



Year. 





























Max- 



Min- 





Max- 



Min- 





Max- 



Min- 





Max- 



Min- 







imum. 



imum. 





imum. 



imum. 





imum. 



imum. 





imum. 



imum. 





1900 



69 



6 



40.2 



81 



25 



54.8 



92 



40 



65.4 



90 



39 



64.9 



1901 



79 



8 



40.2 



77 



31 



53.7 



90. 



35 



60.0 



95 



44 



71.4 



1902 



74 



9 



41.6 



82 



28 



52.8 



92 



37 



61.0 



93 



40 



63.8 



1903 



71 



4 



40.0 



77 



24 



48.0 



88 



30 



56.9 



89 



40 



66.8 



1904 



72 



15 



41.5 



77 



26 



49.2 



80 



36 



57.2 



87 



37 



63.2 



1905 



73 



12 



37.3 



77 



25 



47.2 



88 



42 



61.6 



88 



42 



63.8 



1906 



74 



16 



43.2 



77 



27 



51.0 



88 



33 



57.9 



88 



39 



62.9 



1907 



72 



15 



39.3 



80 



8 



45.4 



83 



36 



5S.1 



91 



43 



66.3 



1908 



75 



7 



44.2 



81 



23 



47.8 



85 



40 



57.9 



89 



36 



65.0 



1909 



70 



10 



36.0 



75 



18 



46.8 



89 



41 



61.3 



93 



44 



68.0 



1910 



82 



21 



46.4 



79 



25 



49.6 



91 



37 



62.7 



95 



43 



69.2 



1911 



71 



14 



41.4 



79 



25 



52.2 



87 



43 



64.6 



86 



42 



64.7 



1912 



62 



17 



40.2 



81 



28 



50.4 



86 



33 



58.5 



86 



46 



65.0 



1913 



73 



19 



43.1 



81 



28 



52.0 



88 



40 



60.8 



92 



43 



65.2 



1914 



67 



12 



40.2 



76 



27 



51.1 



85 



41 



61.4 



86 



43 



66.6 



1915 



70 



26 



46.0 



79 



21 



46.4 



78 



29 



54.6 



89 



33 



62.3 



Average.. 



72 



13 



41.3 



79 



24 



49.9 



87 



37 



59.9 



90 



41 



65.6 



Data showing the dates of the latest frost in spring and the first 

 frost in autumn and the length of the frost-free period for each year 

 from 1900 to 1916 are presented in Table V. These data were 

 obtained from the records of the United States Weather Bureau at 

 Cheyenne, Wyo. 



Table -V. — Dates of kUling frosts, the last in spring and the first in autumn, with the 

 length of tli£ frost-free period, at Cheyenne, Wyo., in each year, 1900 to 1915, inclusive. 



[Data obtained from the records of the United States Weather Hureau.] 



Year. 



Dates of killing 

 frosts. 



Frost-freo 

 period. 



Year. 



Dates of killhiR 

 frosts. 



I'>ost-free 



Last in 

 spring. 



First in 

 autiunn. 



Last in 

 spring. 



First in 

 autumn. 



period. 



1000 



May 19 

 May 22 

 May 21 

 June 1 

 May 17 

 May 16 

 May 6 

 May 14 

 May 10 



Hept. 26 

 Sept. 16 

 Hcpt. 12 

 Hept. 14 



...do 



Oct. 9 

 Oct. 4 

 Hept. 20 

 Bept. 26 



Days. 

 129 

 117 

 113 

 105 

 119 

 145 

 150 

 128 

 138 



1909 



Muy 25 

 May 22 

 May 27 

 May 14 

 May 3 

 May 7 

 June 13 



Sopt. 22 

 Aug. 25 

 Oct. 19 

 Soj)t. 15 

 .S(!l)t. 20 

 Sept. 14 

 Oct. 5 



Dayx. 

 119 



1901 



1910 



94 



1902 



1911 



144 



19fO 



1912 



123 



19fM 



1913 



139 



190.'i 



1914 



130 



1906 



1916 



114 









1908 



May 18 



Sopt. 21 



126 









