308 



TRANSACTIONS OF THE 

 Summary for May, I8S4 to 1888 , at Oroville. 



Year : 



1S84. 



1885. 



1886. 1887 



1888. 



Average. 



Mean temperature ... 

 Highest temperature. 

 Lowest temperature. - 



Clear days ._. 



Cloudy days 



Fair days 



Rainfall.-. 



Season to date 



Light frost 



68.82 

 88.00 

 51.00 



72.13 



96.00 



52.00 



24 



4 



3 



0.65 



19.10 







68.45 



90.00 



52.00 



25 



4 



2 



0.50 



31.21 







70.01 



102.00 



39.00 



24 



2 



4 



0.08 



17.49 







69.02 



90.00 



51.00 



21 



6 



4 



0.38 



16.60 







69.86 



93.10 



49.00 



23.20 



4 



3.10 



0.40 



21.10 







June, 1888 — The temperature of June compares favorably with June in 

 1884 and 1885, the mean for the three months 1884, 72.70°; 1885, 73°; 

 1888, 72.03, and the maximum 94°, 90°, 93°, and the minimum 56°, 57°, 57°, 

 showing the mean maximum and minimum for the three months was 

 nearly of the same temperature. The highest barometer for this month 

 was 30.02; lowest, 29.67; mean, 29.828; clear days, 20; cloudy, 7; fair 3. 

 Rain fell on part of 5 days and a trace on 3 ; rainfall, 1.16; for the sea- 

 son, 17.76. More rain fell this month than any June recorded. Prevail- 

 ing wind, southerly; no frost. On the third of this month a thunder and 

 lightning storm occurred; the precipitation was .34 of an inch. Also, two 

 well denned solar circles appeared around the sun on the eighth and 

 eleventh; the latter was described by me, and published in the " Oroville 

 Register" of the fourteenth. This was the most brilliant one I have ever 

 seen, and attracted crowds of people on the streets for hours viewing the 

 extraordinary phenomenon. 



Summary for June, 1884 to 1888, at Oroville. 



Year: 



1884. 1885. 1886. 1S87. 188S. Average 



Mean temperature ... 

 Highest temperature- 

 Lowest temperature.. 



Cleardays. 



Cloudy days 



Fair days 



Rainfall 



Season to date 



Light frost - 



72.70 

 94.00 

 56.00 



73.00 



90.00 



57.00 



21 



5 



4 



0.39 



19.49 







79.12 



95.00 



62.00 



30 











0.00 



31.21 







76.09 



104.00 



54.00 



24 



2 



4 



0.18 



17.67 







72.03 



93.00 



57.00 



20 



6 



4 



1.16 



17.76 







74.59 



95.10 



57.10 



24 



3.1 



3 



0.43 



21.53 







July, 1888 — Shows greater extremes of temperature than any July for 

 five years. Although the mean temperature was an average one, 79.8°. 

 The highest was 102°, nearly 2° above the average; the lowest, 56°, about 

 2° below the average. Extremes, 46°, nearly 5° above the average. There 

 were more days the thermometer was above 90° than any of the past five 

 Julys. In 1884 there were 15 days; 1885, 13; 1886, 14; 1887, 14; 1888, 16. 

 Highest barometer, 30.18; lowest, 29.74; mean, 29.88. _ There were 28 

 clear days; 3 fair, none cloudy. There was .07 of an inch fell on the 

 eleventh, the first rainfall recorded in July for five years. There was a 

 trace on the seventeenth, twenty-first, and thirty-first, in 1885; there was 

 a trace on the second, in 1866;- and on the eighth, ninth, and twelfth, in 

 1887. Prevailing winds, southerly. No frost. A total eclipse of the moon 

 occurred on Sunday, the eleventh; at 7:50 p. m. the moon entered the 



