4 BULLETIN 270, U. S. DEPARTMENT. OF AGRICULTURE. 
miles west of Williston. In December of that year the station of 
the Weather Bureau was moved to Williston. The Biophysical Lab- 
oratory of the Bureau of Plant Industry installed weather instru- 
ments at the Williston substation in 1909, and since that year the 
rainfall recorded there for the months during the growing season 
(April to July, inclusive) is used in the rainfall table. The growing 
season for the small grains extends from April to about August 1 
to 10. The crops are so nearly mature cn August 1, however, that 
precipitation after that date has little effect on yields. The table 
shows the rainfall, by months for the growing season and for the 
year, with monthly averages, maxima, and minima. 
TaBLE 1.—Monthly, annual, and seasonal precipitation, with the average, maximum, 
and minimum for each month, at Williston, N. Dak., 1879 to 1914, wnclusive. 
Dats (in inches) from the records of the U. S. Weather Bureau and the Blophysic# Laboratory of the 
Bureau of Plant Industry.] 
} | | | | 
| | April 
= = | = 1) sAqy= _. to 
Year. | Jan. | Teb.| Mar. Apr. | May. | June.) July.| Aug.| Sept. | Oct. | Nov.| Dee. nual. | July, 
; “| sea- 
| | sonal 
| 
1S ness: 0.58 | 0.59 | 0.03 | 2.75 | 5.56 | 3.35 | 3.63 | 0.18 |Trace. | 1.55 | 0.37 | 1.68 | 20.27 | 15.29 
1880 SS e ee .10 -ol 21 74 | 4.02 | 5.46 | 4.17 | 2:36} 1.04 90 -66 | 3.08 | 23.25 | 14.39 
188i eee: 1985) 42103) L072 |) £344 005 3-450 ale 225) 10 Site Peto) ||) oak .09 | 13.81 7.01 
ASS 2h see .26 | .29 69 {94 A261 [BE 19. D5 ee Gata 86: | 1004, 2629 ood | 2I258 6. 67 
ISS3 ssa e 1-98) 36 91 SAS 09 504 12169) | G6 522)| 1eat 4 -11 | 10.82 3.73 
thiol A eee celal: 12 LOM ESOS 4S 14a S998 le Sia) i506 Od | wate ero -40 | 7.37 4.30 
1885 eee . 64 st 035] tA | 212025) 6305" | 320231 1-50 5262 |= Oslo -14 | 15.56 | 11.80 
18865 sss 41 71 33 hal (Eo tooy ay fd Sea OLS Sh May oye | Sec of .05.] 1.57 | .59 -55 | 10.24 4.88 
1887-2. -ol 18 12) | 4209) 1.59: | 3.25 | 2.00)) 3591 | 1.07 | 443° | 310 18 | 15.43 7.93 
ESOS Sse aes Ai | 33 AAP Ol | 96: | Gon 2 eet s6t G2H ES O2a ea 10 07 | 14.7 10. 44 
i tolsh eee oe loa ss80e|, 202) 5602/2569 5A 035) Gant oon Lee Ola tas -42 | 8.46 4.95 
1890 Fe eSee -22 | ~187|° 58°} =.60) | 1-58: | 5. 23°) 1.06 22 | 2.05 | 2.45 03 -04 | 14.24 8. 47 
1ROUS Hee 9 | 14 |- .27 |-1:84 | 1.49 | 7.08 |-2.99 7 66 | 1.96 | 1.44 .14 | 18.98 | 13.40 
18932 oe 214 | -.38 | .38 | 2.65] .48 | 2.41 | 4.49 | .62 Sut 15 | 1.12 | 1.33 | 14.26} 10.03 
LS easenae 2.04 31 12 | -.38 | 4:79 | 1.84 | 1:85'| 231 264) 1-144 256-] 1592") 15-90 &. 86 
1RO4 eS . 88 QOD 234.2207 Woe 15) 4.682) 02 tee 1.50 | 1.05 | .85 -40 | 17.76 9.92 
1S95eSe5 == -do3 47 | -.07 | 2-52) 3502) |<3:67 | 2.55. | 1.03 Soo | coo ee OF 563) -d7s0e ded ere 
18962 -2-s-= 2.02 71_} 1.80 | 2.86 | 5.79 | 3.45 | 1.22 72 .89 34 | 2.10 -14 | 22.04 |} 13.32 
1897255... SOG lL Oe Oa Oia Sei eee ale SOR eto 58 43 | .85 -16 ; 12.19 | 5.96 
ASOR ese ee .O1 74-] 1.25 | 1.08 | 1.21 | 4.56 | 1.93 23 99 | 2.08 | .30 06 | 14.441 8.7 
189952 See 58 LO he e79E |S 26022539 Ss Fees OI 56 01 | 1.06]. .13 -76 | 12.61 8. 62 
19005532 a5. - 03 85 | 1.25) .57| 1.46 | .65 | 2.341.4.47 | 2.24 | 1.03 71 .21 ) 15.81 5.02 
1901S >. .o4 34 26 46 | .71 | 8.84 | 2.7 | STA 1a eee RESO? -83 | 18.36 | 12.7 
1902-2 25=—- = 09>} 41.52 =} 1:36 53 | 2.69 | 3.92 | 3.43 | 1.26 Soiieesoe 72 -68 | 16.85 | 10.57 
1QDS +2 she 2 . 40 27 15-509 | ~ 79°) '3.394) 2506" )°2: 4371 5.024- 1039 |: 05 | 2187) 4207 (et 7e69 9.22 
1904 Sees 58 HON elo | (8e| ASQ 7 2 oSiik noes stoe | 12S | 23 Bae OL 58 | 9.44 5.19 
19050 Sh 22 10| .14! .18| .04!1.74] 3.44! 1.94] 174! 1.93] .06! .31 04! 10.66] 7.15 
1906-2 <= | 282 03 | .16 | 1.59 | 4.55-| 8.80] .50 | 2.39] 1.18] .26 | 1.00 -73 | 22.01 | 15.44 
1907; 2e% 22 | 1.03 135) =°.662| S84 SL 1522.03 3) 1 82-2: 067 45 | ~.08 }° .02 .26 | 10.18 5.49 
I9O8E Sse 2 | .04 39 | .79 | 1.96 | 1.80 | 2.64] .60] 1.11] 2.18] 1.18] .16 01 13.49 7.00 
1909 fea -.ol 10 | .12)| .64 | 2.84)3.72 11.72] .38|) 1.27] .17| .20 -46 | 11.93 8. 92 
IOS eee 27 34 | 1.23 | 1.40 | 1.30 | 1.65 | 1.27 | 1.69 14-3) =. 05) 166 -28 | 10.28 5. 62 
1911 ete ee 56 34 -42 | .32 | 3.00 | 1.37 | 1.40 | 2.56 | 2.49} .53 | 1.25 .39 | 14.83 6.09 
NOIZE Pee . 44 17 vad) | 2213) | 4259) 1597 SeCOn Ss 4r- | eerie aia .14 .18 | 18.99 | 11.91 
1913 ee eee -o2 14} .94| .15 | 1.05 | 2.15 | 2.60] 5.50°| 1.13 | .94] -45 /Drace.} 15:27 5. 95 
1914s So. 5 55 28} .50] .49 1.31 7.98 | 2.32 | 3.55 64] .38 | .24 33 | 18.47 | 12.00 
Aver- 
a 8S 57 S660 | Led) 210 S252] 199 ts -96 | .75] .55 -03 | 14.90 8. 86 
axXi-| 
mum .| 2.04 | 1.52 | 2.23 | 2.8 | 5.79 | 8.84 | 4.49 | 5.50 | 2.86] 2.45 | 2.10] 3.08 | 23.25] 15.44 
Mini- 
mum.) .01} .03) .03 | .04| .14] .65] .02] .16 /Trace.| .01| .01 |Trace.| 7.37 | 3.73 
} | j i] H 
The average annual precipitation for the period of 36 years, as 
shown by Table I, is 14.90 inches. The maximum for any one year 
was 23.25 inches (in 1880) and the minimum was 7.37 inches (in 
1884). During the same period the average precipitation for the 
°F 
Ry ah a AO" 
1, apap 
4! 
