THE SUNSHINE OF GUERNSEY FOR THE 

 YEAR 1917. 



BY MR. A. COLLENETTE, F.C.8. 



The year having proved to be a dry one it might have been 

 expected to prove a sunny one also, but that was not the case. 

 There was a deficit in the year's total of 25 hours as compared 

 with the average (24 years). The total for the year was 

 1,869 hours against 1,894 hours, the average. The table 

 shows that seven months were below their averages and five 

 above ; the five sunny months being February, April, June, 

 October and December. April gave the largest excess over 

 the average, 51 hours, and July the largest deficit, 53 hours; 

 thus these departures from the normal nearly balanced each 

 other. 



A reference to last year's paper will remind the members 

 that the month of June had shown a decided tendency to 

 yield a smaller sunshine total than its place in the year would 

 lead us to expect. Had a forecast been given for this year, 

 on the basis of that fact it would have proved falacious, for 

 instead of June having a smaller total than July, as it' has in 

 the averages, it exceeded July by 55 hours. 



The year was not very different from the normal until 

 July was reached, when a series of cloudy days caused a loss 

 of 90 hours during the months of July, August and September. 



The sunniest months were April and June, and the least 

 sunny were January and November. January was a long way 

 behind its average, but not the gloomiest we have had. The 

 range of sunshine in .January, as will be seen by the table, 

 exceeds the total we recorded this year. 



The greatest departures of the months from their 

 averages were April with an excess of 51 hours and July 

 with a deficit of 53 hours. 



The mean sunshine of an April day is 6*3 hours, this 

 this year the April day was worth 8*2 hours. Thus April 

 was, this year, equal to June in the averages. 



