BULLETIN 33, U. S. DEPARTMENT OF AGRICULTURE. 



viriduta), with occasional patches of buffalo grass (Bulbulis dacty- 

 Joides) and western wheat-grass (Agropyron smithii) . The grama, 

 buffalo, and western wheat grasses supplied good grazing and have 

 sometimes been cut for hay. 



RAINFALL. 



Table I contains a record of the annual precipitation at Dickinson, 

 by months, for the years from 1892 to 1913, inclusive, The data pre- 

 vious to 190G were recorded at the city of Dickinson; since that time 

 they have been kept at the substation. 



Table I. — Monthly and annual precipitation at Dickinson, N. Dak., from 1892 

 to 1918, inclusive, with the average, maximum, and minimum for each 

 month. 



[Rainfall in inches; T.=trace; data from the records of the Weather Bureau.] 



Year. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Total. 



1892 



10.32 



0.60 



0.60 



3.60 



1.77 



2.20 



3.89 



11.50 



0.10 



0.24 



0.15 



0.38 



115.35 



1893 



.86 

 .12 

 .10 

 .92 

 1.50 

 T. 

 .12 



T. 

 T. 

 .32 

 .56 

 1.20 

 .20 

 .20 



.60 



.94 



1.06 



1.01 



2.21 



.38 



.82 



.45 

 2.40 

 1.36 

 2.35 

 1.93 

 1.02 

 1.83 



2.90 



.90 



1.69 



5.16 



1.45 



4.48 

 3.28 

 2.54 



1.87 

 3.44 

 2.47 

 1.55 

 12.34 

 1.63 

 2.79 



.46 

 .95 

 .51 

 .58 

 11.06 

 .77 

 3.41 



1.59 



.90 

 .13 

 .30 

 .36 

 .79 

 .08 



.37 



.58 



1 .25 



.71 



.15 



2.73 



1.43 



.02 

 .47 

 .34 

 2.65 

 .85 

 .30 

 .22 



1.06 

 .29 



.50 



.15 



T. 



.80 



.27 



11.63 



1891 



15 47 



1895 



1 12 01 



1896 



18 48 



1897 



.73 U.19 

 2.00 ! 1.30 

 3.51 2.59 



1 13. 52 



1898 



11.92 



1899 



17.27 



1900 



.21 



.63 



.96 



.65 



.48 .83 1.19 



3.15 



2.56 



.47 



.55 



.10 



11.78 



1901. 



.01 



.39 



.70 



.62 



.13 3.83 1 3.69 



.45 



.83 



.22 



.80 



1.25 



12.92 



1902 



.18 



1.43 



2.64 



.16 



3.02 2.56 13.34 



'1.89 



1.05 



1.10 



i,40 



1.30 



1 16.07 



1903 . 



1.85 

 .33 



1.20 



.60 



T. 

 2.02 



.31 



.92 



3.59 : 1.18 .52 

 . 90 j 6. 10 .32 



5.52 

 2.68 



3.70 



.26 



.08 

 .22 



.13 



.04 



.82 

 .80 



1 16 90 



1904 



15. 19 



1905 



.23 



.49 



.15 



.09 



2.74 3.75 3.46 



1.48 



2.06 



.71 



1.31 



.08 



16.55 



1906 



.65 



.40 



.98 



1.10 



7.11 5.40 1 .16 



2.64 



.25 



.14 



.87 



.76 



20.46 



1907 



.80 



.14 



.39 



.30 



1.36 2.<52 1 4.82 



1.89 



1.11 



.10 



.02 



.22 



13.67 



1908 



.28 



.73 



1.42 



1.27 



3.50 4.30 1.41 



1.41 



1.67 



2.47 



.78 



.24 



19.48 



1909 



.27 



.52 



.25 



.51 



5.78 ' 3.28 



1.89 



5.54 



.83 



1.08 



.29 



1.02 



21.26 



1910 



.31 



.97 



.82 



1.71 



1.26 3.02 



2.07 



1.61 



.70 



.54 



.15 



.15 



13.34 



1911 



.90 



.00 



.43 



.59 



1.63 2.61 



1.27 



2.18 



2.63 



2.16 



.56 



.22 



15.73 



1912 



.41 



.12 



.50 



2.42 



3.99 1.92 



3.80 



2.68 



1.89 



1.15 



.18 



T. 



19.06 





.13 



.04 



1.22 



.52 



1.78 1.77 



1.36 



2.70 



.94 



1.04 



.43 



T. 



11.93 







Average 



.43 



.47 



.92 



1.19 



2.54 2.82 



2.24 



2.05 



1.08 



.77 



.52 



.43 



15.46 



Maximum... 



1.50 



1.43 



2.64 



3.60 



7.11 1 6.10 



4.82 



5.54 



3.70 



2.73 



2.65 



1.25 



21.23 



Minimum . . . 



T. 



T. 



T. 



.16 



.13 1 .83 



.16 



. .0 



.05 



.08 



.02 



T. 



11.63 



1 Estimated from surrounding stations. 



The average annual precipitation at Dickinson for the past 22 

 years, as shown in Table I, has been 15.46 inches. This table shows 

 that the maximum precipitation during the 22 years from 1892 to 

 1913, inclusive, was 21.26 inches (in 1909) and that the minimum for 

 the same period was 11.63 inches (in 1893). The precipitation during 

 the year 1913 was only 0.3 inch greater than the minimum for the 22 

 years the records have been kept. The precipitation has been above 

 normal 11 years and below normal 11 years. This fact is shown 

 graphically in figure 1. Table I shows further that May, June, July, 

 and August are the wettest months, June having the highest average 

 rainfall, 2.82 inches. December and January are the driest months. 

 Most of the precipitation from November to March comes in the 

 form of snow. 



