4 BULLETIN 154, U. S. DEPARTMENT OF AGRICULTURE. 



varies with the degree of slope, ground cover, and the permeability, 

 kind, and depth of soil, and its degree of exposure to wind and 

 sun. Air humidity also plays a part. 



Table 1. — Climate witliin the lodgepole region. 



[Compiled from United States Weather Bureau reports.] 



Type of land or forest 

 at station — timbered 



Ap- 

 proxi- 

 mate 

 period 



on 

 which 

 aver- 

 ages 

 are 

 based. 



Ele- 



Annual precipi- 

 tation. 



Annual tempera- 

 ture. 



Mean. 



Maxi- 

 mum. 



Mini- 

 mum. 



Mean. 



Maxi- 

 mum. 



Mini- 

 mum. 



Colorado: 



Gunnison 



- Moraine 



Marble 



Grand Lake 



Georgetown 



Longs Peak .... 



Redeliffe 



Columbine 



Prances 



Breckinridge . . . 



Spruce Lodge... 



Leadville 



Carona 



Wyoming: 



Centennial 



■ Woodroek 1 



Lome Lake 2 



Yellowstone Na- 

 tional Park: 



Port Yellow- 

 stone. 



Tower Falls 3 ... 



Riverside 3 



Sylvan Pass 3 ... 



Snake River 3 . . 



Pair view 3 



Fountain 3 



Geyser Basin 3 .. 



Norris 3 



Lake Yellow- 

 stone. 3 



Grand Canyon 3 . 

 Montana: 



Helena 



Livingston 



Bozeman 



Anaconda 



Butte 



Pipestone Pass. 



Bowen 



Fish Creek. . 



Below timber line 



Yellow pine 



Lodgepole 



....do 



Yellow pine (cut over). 



Lodgepole 



....do 



Engelmann spruce 



Lodgepole 



....do 



Engelmann spruce 



Open 



Above timber line 



Below timber line. 



Lodgepole 



Alpine 



Juniper 



Douglas fir. 

 Lodgepole . 



....do 



do 



Douglas fir. 

 Lodgepole . 



do 



do 



do 



Years. 



21 



23 



4 



5 



11 



18 



20 



3 



8 



24 



5 



15 



6 



10 

 1 

 2 



.do. 



Below timber line. 



do 



do 



Juniper 



Below timber line. 



Douglas fir 



Below timber line. 

 Lodgepole 



Feet. 

 7,670 

 7,775 

 7,951 

 8,153 

 8,550 

 8,600 

 8,695 

 8,766 

 9,300 

 9, 536 

 9,600 

 10, 248 

 11, 660 



8,074 

 8,500 

 8,821 



6, 200 



6,250 

 6,500 

 7,000 

 7,000 

 7,000 

 7,220 

 7,395 

 7,500 

 7,733 



7,900 



4,110 



4,488 

 4,700 

 5,300 

 5,716 

 5,800 

 6,060 

 7,800 



In. 



9.48 

 16.13 

 29.60 

 17.66 

 12.82 

 20.00 

 20.70 

 25.00 

 25.89 

 23.90 

 31.64 

 14.98 

 45.87 



18.59 

 44.39 

 34.78 



16.93 



16.27 

 19.58 

 25.48 

 27.79 

 16.11 

 17.90 

 21.23 

 19.23 

 25.04 



25.72 



13.42 

 14.36 

 18.72 

 14.99 

 13.80 

 18.87 

 13.75 

 23.31 



In. 

 13.45 

 22.37 

 35.66 

 22.74 

 19.05 

 29.84 

 30.02 



33.72 

 46.41 

 36.12 

 23.76 

 58.32 



27.68 

 44.39 



20.35 



19.29 

 23.85 

 27.72 

 33.77 

 18.83 

 19.07 

 22.69 

 22.62 

 42.15 



27.81 



19.94 

 19.96 

 32.63 

 18.89 

 20.55 

 19.66 

 18.56 

 24.70 



In. 



6.86 

 11.74 

 21.82 

 12.80 

 11.72 

 13.93 

 10.96 



Beg. F. 

 37.0 



40.8 

 40.2 



Dcg.F. 

 96 



90 

 90 



Deg.F. 

 -46 

 -32 

 -29 



37.8 



85 



21.65 

 14.22 

 26.02 

 11.75 

 35.90 



5.14 



40.6 

 33.7 



35.0 

 26.2 



38.8 

 '30.' 7 



13.31 



13.63 

 14.38 

 24.03 

 21.32 

 11.51 

 15.88 

 19.33 

 17.13 

 17.39 



23.62 



6.71 

 10.68 

 14.18 

 9.03 

 6.95 

 17.61 

 10.10 

 20.69 



38.3 



35.6 

 35.3 

 34.2 

 34.6 

 34.9 

 33.2 

 34.4 

 33.4 

 31.2 



31.9 



43.3 



45.8 

 43.2 

 42.1 

 42.1 



40.2 



39.3 



36.8 

 34.7 

 36.2 

 37.0 

 35.8 

 36.2 

 35.8 

 33.7 



33.1 



103 

 106 

 112 



96 



94 



32.7 

 35.1 



-36.3 



-33.6 

 -33.9 

 -33.7 

 -33.2 

 -32.9 

 -31.5 

 -31.6 

 -30.4 

 -29.4 



-30.7 



-42 

 -34 

 —53 

 -33 

 -29 



1 Probably reaches freezing every month; no temperature record. 



2 Likely to get freezing temperature any month. 



3 Freezing temperatures every month in year. 



