SUNSHINE IN GUERNSEY. 



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



The year has again proved to be a year of small sunshine, 

 the total being 138 hours less than the average. There have 

 been, in the 17 years during which sunshine has been regis- 

 tered in the island, four only with smaller totals. 

 We now have on record 



5 years with totals under 1,800 hours. 



4 „ „ „ of from 1,800 to 1,900 hours. 

 3 „ „ „ „ 1,900 to 2,000 hours. 



5 „ „ „ over 2,000 hours. 



The extremes of the whole period are shown in Table 2. 

 The range in the annual totals being 491 hours. We thus 

 know, although the period is short, that our sunshine can 

 vary from year to year as much as 500 hours. 



The months of July and August narrowly escaped being 

 records of low sunshine, July being 3 hours and August 

 6 hours only in excess of the previous lowest figures. 



The coldness and sunless summer is once more somewhat 

 remarkable, for while the winter months January, February, 

 March and December were above their averages, April to 

 September inclusive were deficient in sunshine. 



The deficit of these summer months amounted to 177 

 hours, equal indeed to the whole sunshine of September this 

 year, and July which should have contributed 270 hours gave 

 practically 80 less. August followed with a loss of 50 hours. 

 On the other hand March gave a surplus of 45 hours. 



Last year July was 47 hours in deficit, that is in two 

 years we have a total of 127 hours out of the 680 due, that is 

 a mean annual loss during those two years of 63, on an 

 average of 340 hours. 



Going backward I find that the reduction of the average 

 in July is considerable, and to show that I have prepared a 

 new table (3) comparing the values of the averages of this 

 and the other summer months. 



The loss here shown does not exist in the winter months 

 the averages of which have either remained stationary or 

 have increased. 



This absence of sunshine is serious, but we may comfort 

 ourselves by believing that the loss will be made up and that 

 warm and favourable summers will in due order succeed. 

 [1910 ] 



