GUERNSEY SUNSHINIO FOK H)(i7. 



BY Mli. A. COJ.LEXF/rTK, F.( .S. 



The year 1907 has^ fallen 56*55 hours below the average of 

 the 14 years during which sunshine records have been kept. 



As will be seen in the first table there have been live 

 months above their averages and seven below. Among those 

 above, March stands out as having passed its average by 82 

 hours and, as shew^n in table 2, is the sunniest March on 

 record. There have been two other records, but unfortunately 

 they were records of gloom; both May and June proved to be 

 the gloomiest we have had in the 14 years. 



March contributed 12*4 °^ of the year's total instead of 

 T-e'/;. April, Mav and June, 9-8 7^; 9-7 ° ^ and 10-2% 

 instead of lO'l \ , "12-9 7„ and 13-1 \'. The other months 

 were nearer their proper proportion. 



Although cloud is estimated and sunshine measured there 

 is a fair agreement between cloudiness and sunshine in the 

 tables. This is the more satisfactory when we consider that 

 the amount of cloud is estimated at 9 a.m. and 9 jD.m., there- 

 fore in the latter case after sundown. March gives 3*6 as the 

 cloud instead of its average, 5'5. We therefore expect to 

 find April, May and June in excess of their averages of cloud, 

 and so it has proved, for these have each 6*3 (April 6*2), 

 when they should not have varied much from 4*5. On the 

 whole the cloud of the year is 6*0 instead of the average 5*3. 

 Naturally Ave also expect that the sunless days have increased 

 in 1907 and find 58 instead of 47. November was the month 

 with the greatest number, 11, and 8 months had a larger 

 number of sunless days than their averages. 



Although a year of low, it has not been a year of least, 

 sunshine, for there have been five years of lower sunshine, but 

 it has fallen below the average. The daily value of mean 

 sunshine in each month is now fairly made out and we find 

 that a December day is worth in sunshine, in the averages, 

 1*4 hours ; a July day, 9 hours, the remainder lie between 

 these two extremes. The whole year gives the average daily 

 sunshine as 5*2 hours. That of the South coast of England 

 is 4-9. 



The details of the table is worth a studv. For instance 

 March is a record for Maximum, while May and June are 

 records for ^linimum sunshine. 



