52 ROYAL SOCIETY OF CANADA 
perature on the Mountain top is actually higher than at Calgary, while in 
seasons, when the Chinook is persistent, the mean temperature at Calgary 
is very decidedly higher than at Banff and on Sulphur Mountain. 
TABLE I—SHEWING THIS MEAN MONTHLY TEMPERATURE AT CALGARY, BANFF 
AND SULPHUR MOUNTAIN DURING THE YEARS 19049. 
















sah | 
Jan.| Feb. |Mar. Apr. (May. | Jun.| July.) Aug.| Sept.) Oct. Nov. | Dec.| Year 
| | 
—|——| | — —_—|___-__|_—_ À ——— ___!__|__|__|—_ ee 
1904 | | | | 
Calgary 17.6—1.1| 13.3 43.0) 48.0! 54.3| 61. 56.6! 51.0) 43.7| 35.5| 20.3) 36.9 
Ban ra 17.7] .2) 15.7, 39.8) 44.5) 50.7| 59.3) 55.3) 49.4) 42.9) 35.9) 19.8| 36.4 
Sulphur M’t...:| 10.6) 4.5) 6.6 29.8) 32.2] 40.8/°51.1] 47.8] 38.7] 31.0] 24.9] 12.6] 27.6 
1905 | 
Calgary. : .....| 10.0} 14.4] 36.0] 39.5) 47.4| 52.9| 61.2! 59.9| 51.5! 37.4| 33.7! 24.6| 39.0 
Bantl oct ver MIS loses 33.8) 37.9| 43.7| 49.7| 58.4 56.8 48 9! 32.6| 3022) 22-4) S628 
Sulphur M’t....| 10.1] 12.1] 23.2] 26.4) 30.9] 36.7) 46.7, 46.6) 36.5) 19.7| 20.3] 15.2) 27.0 
1906 
Calgary. . .....| 16.0] 24.3] 25.4] 45.5] 46.4] 56.0 a 60.0) 51.4) 44.4) 26.9] 11.6) 39.3 
Baniis. se6 cai LS 6) p2onOl24aes 049 4) 440) bled Ge 8 55.6| 49.3} 40.7] 22.7] 15.4] 37.5 
Sulphur M’t....j) 12.3] 14:7) 13.0) 30) 7) 31 39.1] 52.9) 45.2) 37.8} 28.5) 15.0] 13.2) 27.8 
1907 
Calgary. ......|/—6.3] 21.0] 22.1 34.6) 44.2 55.0 BA 55.0) 48.9) 48.0} 34.5] 23.6] 36.7 
Banff........ |--4.3] 21.4] 22.3] 33.0] 42.8 51.1] 56.6; 51 8| 46.9] 44.6] 31.0] 20.0} 34.8 
Sulphur M’t..../—4.4) 7.0| 10.4) 18.4 28.1) 38.2 46.3) 39.2} 34.6] 35.8] 19.9] 11.5] 23.8 
1908 | | 
Calgary 07--710025:810228 102240114372 150 On oars 63.7| 57.8| 53.3| 40.4] 33.3] 21.2] 40.7 
Ban |) 10c4) cize5l e250 8800) 6 SIG 59.5, 55.7) 49.7] 36.4] 30.0} 16.1] 36.8 
Sulphur M’t....| 9.3] 7.6] 8.8| 23.4! 31.4) 38.4] 49.4) 44.8] 38.0] 26.6) 20.2) 10.7| 25.7 
1909 | | 
Calgarr 10876 11.3) 30.7| 32.6 46 5! 56.8) 61.4) 59.0} 55.2! 40.6| 19.6| 18.9] 36.0 
Banff 74.20 ol 9) M5 272620 01043 4) 52.3] 57.1| 54.5) 50.9] 38.9] 20.4] 10.0] 32.6 
Sulphur M’t....| 4.3] 8.2! 17.9] 16.9) 30.9) 40.4] 47.0) 46.1] 41.5) 27.1] 18.7] 8.0] 25.1 
Mean | 
Calgary. . .....1 11.1| 15.4| 24.9| 39.7| 45.2| 55.0| 62.0 58.0, 51.9} 42.4] 30.6] 19.2] 37.9 
Banff... sielsieiz/ sti) LOO |LOG} meno 36.7| 42.2] 51.1] 59.0] 55.0) 49.2] 39.4] 28.4! 17.3] 35.8 
Sulphur M’t....| 7.0) 9.0) 13.3] 24.3] 30.7| 38.9] 48.9] 44.9; 37.9] 28.1] 19.0] 11 9} 26.2 
Daily Range | 
Calgary. . .....| 20.5| 22.4| 22.9| 26.9) 24.5) 25.3| 28.5) 28.2 27.3] 24.2| 20.8| 19.0| 24.3 
Banff.........| 18.2| 20.9| 22.5] 22.9] 22.8| 25.0] 30.6] 29.1| 24.1| 19.3| 14.3] 15.4) 22.1 
Sulphur M’t....| 9.5| 10.8| 11.4| 11.8| 11.1| 13.1| 15.3 a 11 9.0) 8:0) 7338) hat 




