STATE AiiliK Tl.TCRA], SOCIETY. 



361 



The following will more particularly illustrate the climate of Oakland 

 for the eleven past years, as it regards the equability of seasons and the 

 difference between the warmest and coldest: 



Difference between the wannest and coldest means of the seasons for eleven years is 

 16.51°. 



RELATIVE HUMIDITY. 



Tablr. showing the Relative II n midity. Precipitation, Weather, and Direct ion from which the Wind 

 Blew, from January 1, 1886, to December SI, 1886, inclusive. 



L886. 



-12 



— 55 



a? 



s 





55a 

 5-5 



3 



a? 



- 



1 £ 



I '33 



O? 

 -. 



2 o 



2 = 



Wind— 1,095 Observations. 



a 



a. 



a 



5 



SI 

 P 



a 



o 

 so 



January 



February 



March 



April 



May . 



June 



July 



August 



September 



October _ 



November 



December 



Mean and sums 



88.49 

 88.00 

 87.42 

 86.21 

 84.39 

 S6.36 

 87.53 

 89.90 

 89.50 

 88.45 

 86.89 

 92.70 



2.5V 

 5.11 



0.30 

 0.00 

 0.15 

 0.00 

 0.05 

 1.59 

 0.45 

 3.60 



87.15 



22.24 



20 

 13 

 21 

 25 

 21 

 23 

 21 

 21 

 24 

 17 



239 



18 

 8 



11 



17 



10 

 5 



10 

 8 

 9 



10 

 6 



14 



126 



13 

 4 

 11 

 11 

 5 

 

 1 

 



1 



5 



6 

 6 



63 





 1 

 2 



10 

 7 



13 



18 



20 



13 



5 







3 



21 



92 



12 

 5 



7 

 2 





 

 

 

 

 5 

 17 

 7 



18 

 22 

 37 

 36 

 44 

 41 

 48 

 42 

 38 

 25 

 22 

 16 



55 



389 



5 



11 



12 



17 



3 



1 



2 



7 



10 

 12 

 19 

 13 



112 



20 



9 

 11 

 19 

 14 

 11 



9 

 12 



7 

 20 



5 

 21 



41 

 37 

 29 

 17 

 29 

 33 

 34 

 32 

 34 

 30 

 38 

 37 



45 



158 



391 



Recapitulation of Relative Humidity for the Year 1886. 



Mean relative humidity for the year 87.15 



Highest relative humidity during the year 100.00 



Lowest relative humidity during the year, January 1, 2 p. m. 26.70 



Greatest variation of humidity in twenty-four hours, May 3 - 46.50 



Least variation of humidity in twenty-four hours, April 15 1-50 



Rainfall in inches during the calendar year 22.24 



Rainfall in inches during the agricultural year — 1885-86 28.71 



Rainfall in inches since July 1, 1885 (Bay Nursery) 5.84 



Number of clear and fair days - 239 



Number of cloudy days 126 



Number of days in which rain fell 63 



Number of foggy mornings 21 



Number of mornings overcast 92 



Number of mornings that frost was seen - 55 



Wind, direction from southwest and west 389 



Wind, direction from northwest and north 112 



Wind, direction from northeast and east --. 45 



Wind, direction from southeast and south 158 



Calms 391 



