THE SUNSHINE OF GUERNSEY FOR THE 

 YEAR 1911. 



BY MR. A. COLLENETTE, F.C.S. 



The Year 1911 was a sunny year, its total, 2,121 hours, 

 being 348 hours in excess of that of 1910, and practically 

 200 hours over the average of 18 years. 



The year has had the effect of increasing the average 

 from 1,912 to 1,923 hours. 



Five years' totals have exceeded 2,000 hours (see table 

 2), and of those only one, 1899, has exceeded the total of 1911. 

 The year is therefore the second best year we have expe- 

 rienced, as far as the records go. 



The year is also remarkable in that it has given the 

 highest monthly total so far reached. July, which had a 

 previous record of 340 hours, and was the record among the 

 months, has beaten its own record by 42 hours, and we now 

 have as the highest monthly total, 382 hours. 



Although this is the only record among the months, no 

 fewer than nine have exceeded their averages. 



The three months showing deficits are February, March 

 and October. 



July's total distributed over the 31 days gives a mean of 

 12*6 hours. The average being 8*9 hours it follows that July 

 gave a daily excess of practically 3^ hours. 



The five months, May to September inclusive, contributed 

 68 0 / o of the year's total, hence were responsible for the 

 year's surplus. 



May, June and July were without a sunless day, but the 

 winter months exceeded their average sunless days and left 

 the year, its excess notwithstanding, with 59 or 5 more than 

 is usual. 



Experience has shown that 45 °/ D of the year's i possible 

 sunshine is rarely passed. This year we have recorded 48 °/ 0 , 

 while the highest record reached 50 °/ Q . In table I. it will 

 be seen that five of the 12 months were over 50 °/ Q ; three 

 ver60 °/ 0 and July reached 79 ° /o . 

 [1911.] 



