8 BULLETIN 339, U. S. DEPARTMENT OF AGRICULTURE. 
ranges from about 10 to 14 inches per annum, of which from as 
low as 3 inches to as high as 6.7 inches, or about one-third, occur 
during the growing season from April to September, inclusive. 
The growing season of 1910 in Idaho was the driest on record. 
The precipitation during seven consecutive months, from March to 
September, inclusive, was below normal, but the temperature ranged 
above normal during the entire season. The seasons of 1911 and | 
1912 averaged much cooler than that of 1910, but the precipitation 
a te 
during both of these years ranged above normal during the entire _ 
growing season, aS may be seen from the tables which follow. The 
season of 1913 was another with high precipitation, while the tem- 
perature was a fair average of the other three years, 1910 to 1912, 
inclusive. The following tables and charts have been compiled from 
the records of the United States Weather Bureau for the purpose 
of showing in condensed form the weather conditions that existed 
during the four years covered by the investigation. Figure 1 shows — 
the precipitation for one town in each district and figure 2 the range © 
of temperature during the growing season for three representative 
districts, and it is believed that a careful study of these charts will — 
furnish a correct idea of Idaho’s normal weather conditions and of © 
the weather experienced during the four years’ investigations. 
TABLE I.—Precipitation, seasons of 1910, 1911, 1912, and 1913. 
SEASON OF 1910. 
Avera: ae rene 
Length | preci sHaniore Precipitation by months. ne 
of : Total | ont 
Locality. OE | et TE of a 
in hee ae months 
years. | 1 [ee pt. | Pr: | May. | June. | July. | Aug. | Sept. 
Inches .|Inches .|Inches .| Inches. re ees Inches . Inches .| Inches. = 
IB lackiO0ts. = ooee ee 14 | 10.46 | 4.84] 0.67] 0.7 0.10; 0.21 Abe 0.47 2.23 46 
IB OISG Ee ae | 25 | 12.7 4.10] 1.10) 1.14 30 “Ty: 0 -90 3.04 74 
IB UNE eee e Si, £22227) 5243 82 BOO 20 |) 28 QO: |=2. Se sE ee eee : 
Caldwelliee see 5 | 10.54 | 3.51 1.05 . 84 . 03 Abe 0 .89 2.81 80 
Goodinsats-ee-e-e a ase Meee 77 Sey? 08 24 0 .44 1°85) | 
Hailey sas see ees 8} 17.15 | 4.04 81 . 80 . 06 S27 0 1.33 Soe 81 
Idaho Falls.......-- 15 | 14.45 | 6.24 06 =D .14 aia At 1.30 2.36 38 
Shoshonese 5-2 oee 3 | 15.06 | 2.91 33 -43 .O1 -18 0 .o4 1.49 51S 
twain Hallss- see 5 | 12.90 | 4.40 7 52 - 06 aah? 95 2.38 54 
SEASON OF 1911. 
IBOISONssec eee eee 26:| 12.71 | 4.10) 1.59 | 2:57/]- 2.55 0.05 Ate 0.04 6.80 166 
IBuhlSssss eee Pa TTS) | eta 117/ . 86 1.97 | 2.34 .18 ibs iis 5.35 103 
Caldwells.. 2252-2 Go| SLOSSTE ie Sy59s | MeOSe eiatS 1.44 23 Ab ~12 3.95 110 
Gooding= 252 ae PF | WE ORC eee 9) [Ps a ker is Tid. 1.06 0 0 Ay 3.98 124 
Hailey 455 Ses ON M6527) 45301" 15670)— 2291 TGGS5 |) AOR: AN 03 6. 18 144 
idaho Halls 5-2 16 | 14.00] 6.00 S952 eZ On 2407 30 | 0.07 67 6.95 116 ~ 
Oakleyce es. 18 | 9.5 4.61 5105 Ty se . 84 0 30 5.80 126 
RwaneWalls fee cas 6 | 12.10} 4.19 .43 1.74 . 883 .05 | 0.04 10 3.19 76 
Wendell.........-.- 3 | 13.86 3.96 1.35 2.00 1.95 He 0 4 5.30 134 
ree ahi: 
