258 



THE CANADIAN HORTICULTURIST 



October, 1907 



The Climate of the OKanagan Valley 



H. Gordon, Vernon, British Columbia 



THERE is one meteorological station in 

 the Okanagan Valley, situated upon tlie 

 Coldstream Estate; it is only of the 

 second class, but I have been able to 

 obtain the following figures by analyzing the 

 records kept during the past five years, and 

 courteously placed at my disposal l)v Mr. E. 

 V. Lloyd: 



.MR TR.MPER-ATURE 

 Mean 



Max. 



January... 27.0 



February. . 32 . 2 



March 43.0 



April. 58.5 



May 65 . 7 



June 73.1 



July 83.2 



August 81.2 



September.. 67.4 



October.. . . 55.3 

 November. . 

 Decemljer. . 



Min. Aver. Mean 



15.9 21.51 



18.9 25.6 I for six years 



34.3(1902 to 1907 



46. 8i 



35. 1 

 42.3 



54.0 



47.6 60.4 



52.8 68.0 



51.0 66.1 



43.5 55.5 



for five years 

 1902 to 1906 



36.4 45.9 

 40.8 28.4 34.6 

 32.4 22.5 27. 5j 

 The highest recorded temperature, 101°, July 21, 



1905. 

 The lowest recorded temperature, 24° below 



zero, Jan. 14, 1907. 

 The highest minimum temperature recorded, 63° 



Aug. 7, 1905, July 7 and Aug. 13, 1906. 

 The lowest maximum temperature recorded, 



20° below zero Jan 14, 1907. 



The maximum temperature reached 90° or 

 over on 28 days in June, July and August, 1906; 

 on 20 days in July and August, 1905; on 23 days 

 in June, July and August, 1904; on 5 days in 

 June and July, 1903, and on 4 days in June and 

 July, 1902, only. 



The maximum temperature did not exceed 



zero on 8 occasions only, all in Jan. and Feb., 

 1907. 



The minimum temperature stood at or telow 

 zero on 22 days in Jan. and Feb., 1907; 9 days in 

 Jan., Feb. and Dec, 1905; 6 days in Jan., Feb. 

 and Dec, 1904, and 5 days in Jan. and Feb., 1902, 

 only. 



The minimum temperature readied 60° on 15 

 days in Julv and Aug., 1906; 4 days in July and 

 Aug., 1905,' and 3 days in July and Aug., 1904, 

 only. 



D.VTES OF FIRST .AND LAST FROSTS 



Last FVost First Frost 



1902 26 April 28 September 



1903 8 May 3 October 



1904 11 May 19 September 



1905 18 May 9 October 



1906 5 May 19 October 



The above analysis shows clearly that the 

 climate is far from being free from extremes of 

 tem|)erature. The figures tend to prove that 

 the district exi^eriences a summer day temper- 

 ature which is characteristically continental, 

 tempered by cool nights due to the elevation 

 a)x)ve sea level; and that its winter temperature 

 is, on the whole, moderate, when judged by the 

 standard prevailing in the inland districts of the 

 northern portion of this continent. The records 

 of the precipitation of snow and rain are com- 

 plete for four years, as follows: 



raised to the first -class and ob.servations taken 

 of the relative humidity, sunshine, cloud, wind, 

 etc. A similar station should also Vje established 

 in the southern Okanagan, whose climate is 

 believed to present differences in a few particu- 

 lars from that of the northern Okanagan Ob- 

 servations taken scientifically over a series of 

 years are required to reveal these differences. 



IRRIGATION 



The comparatively small rainfall confirms the 

 necessity for irrigation. Irrigation works are 

 either already installed or in course of construc- 

 tion in every district of importance. The system 

 of distribution of water through Copoletti weirs, 

 which is to be introduced at Vernon, promises t(j 

 be more satisfactory to the user than the present 

 liaphazard method. 



fruit 

 grower if the present meteorological station were 



"The Frviits of Ontario" 



A publication that has been promised to the 

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 The selections are based on the results of varieties 

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 of the work of preparing the volume in charge, 

 and deserves much credit for his labor and 

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The information given on cultural methods is 

 worth much to fruit growers in general. A large 

 number of half-tones of fruit varieties enliven tin 

 pages and make the accompanying description 

 of greater value than it would te otherwise. 

 The entire work is well worth the trouble and 

 anxiety that has been spent in its preparation. 

 It is a credit to the Ontario Department of 

 Agriculture and to its authors. 



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