GANNETT.] 



CLIMATE. 



487 



^reat altitude of the Park, which averages 8,000 feet, the latitude 44° to 

 45°, and the presence of the Yellowstone Eange on its eastern border, 

 which acts as a great barrier to the air-currents, forcing them to dis- 

 gorge whatever moisture they may have accumulated upon the region 

 lying at their western base. 



We have no long series of meteorological observations in the Park 

 or in its neighborhood. Our conclusions are necessarily based upon a 

 few observations scattered about here and there, and, though they are 

 amply sufficient to give a general idea of the climate, they give no 

 detailed knowledge, and none whatever directly concerning the winter 

 season. 



The climate is, as regards temperature, sub-arctic. The winter begins 

 with September and ends only in June, and frosts are not only liable 

 to occur but actually do occur every month of the year. The following 

 statement of tri-daily and minimum temperatures in August, Septem- 

 ber, and October illustrates in a general way the range of temperature 

 in the Park during those months: 



SHOSHONE GEYSER BASLN". 

 [Latitude, 440.21' ; longitude, 110°.48' ; elcTation, 7,837 feet.] 



Date. 



Temperature. 



Relative humidity. 



Min. 

 temp. 



Remarks. 



7 a. m. 



2 p.m. 



6 p.m. 



7 a.m. 



2 p.m. 



6 p.m. 



Anffu8tl4 





74 

 70 

 59 

 62 

 60 

 59 

 63 

 68 

 68 

 63 

 71 

 69 



71 

 60 

 56 

 52 

 49 

 57 

 59 

 65 

 62 

 62 

 67 

 67 







56 

 76 

 88 

 93 

 100 

 81 

 94 



79' 



89 

 68 

 57 



43' 



50 

 47 

 44 

 40 

 86 

 40 

 44 

 53 

 43 

 42 

 34 



Atmosphere very smoky. 



Rain in evening. 



Rain last night and all day. 



Do. 

 Rain in morning. 

 Rainall night; clear inday. 

 Clear. 



Do. 

 Rain in afternoon. 

 Rain aU. day. 

 Clear. 



Do. 



Do. 



15 



16 



17 



18 



19 



20 



21 



22 



23 



24 



25 



26 



48 

 52 

 51 

 49 

 47 

 40 

 44 

 47 

 57 

 48 

 47 

 39 



86 



100 



93 



93 



93 



100 



100 



100 



88 



93 



93 



91 



55 

 88 

 79 

 78 

 82 

 75 

 72 

 80 

 75 

 60 

 52 















UPPER GEYSER BASIN. 

 [Latitude, 44°.28'; longitude, 110O.51'; elevation, 7,373 feet.] 



AugU8t27 



28 



40 

 37 

 54 

 44 

 46 

 36 

 41 



75 



67 











Clear. 









33 



35' 



33 

 31 

 34 



Do. 



29 



30 



31 



59 

 73 



67 

 65 

 72 

 75 



87 

 84 



77 

 37 



61 

 55 

 34 

 35 



Do. 

 Do. 

 Do. 



September 1... 

 2... 



90 

 100 





Do. 

 Do. 



8... 





33 







Snowed all night and day; 



6 inches fell. 

 Clear and windy. 

 Clear. 

 Do. 



9... 



27 

 28 

 2G 











24 

 24 

 23 



10... 

 11... 



50 

 64 



36 





58 

 53 













WHITE MOUNTAIN HOT SPRINGS. 

 [Latitude, 440.58'; longitude, 110°.42'; elevation, 6,387 feet.] 



September 16. 

 17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 



33 

 32 

 44 

 45 

 37 

 35 

 39 

 25 





44 







100 



26 

 36 

 38 

 32 

 28 

 39 

 18 







ei" 



45' 



56 

 49 

 49 

 54 

 36 















100 



61 



93 

 65 

 81 





















Clear. 



Do. 

 Rain in evening. 

 Clear. 



Do. 



Do. 

 W((atlior threatening. 

 Snowed all afternoon and 

 niglit and tli(> followiug 

 day ; 8 inclio.s lell. 



