THE RAINFALL OF GUERNSEY FOR THE 

 YEAR 1913. 



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



1913 may be spoken of as a year of average rainfall 

 for the total is only 0*"39 below the present average of 71 

 years. There was an excess right up to September, but 

 during that month the excess was lost and a small but per- 

 sistent deficit set in. 



The year started with a wet January. March, April 

 and July were wet, but the intermediate months being dry 

 an alternation occurred, so that the line of monthly rainfall 

 consisted of a series of oscillations. 



In September the fall was low but higher than August, 

 then a sudden jump Prom 1*"7 to 5'" 5 in October occurred. 

 November and December are of opposite signs, but they 

 balanced each others departures from the average. 



The months therefore arrange themselves equally as dry 

 and wet months, as follows : — 



DRY. to. WET. ^ 



February — 1*41 January + 2*21 



May - 0-24 March + 1*03 



June - 1-39 April + 0*39 



August - 1-13 July + 0-85 



September —1-28 October + 054 



December — 0*40 November + 0*44 



76% of the year's total fell in the wet months. 



The wet days are 30 in excess of the average, hence 

 it is certain that the falls were less heavy as a rule. 



As regards the distribution of rainfall over the whole 

 island the previously ascertained facts are confirmed. 



The west of the island, as represented by the Forest and 

 St. Peter's stations, show differences from the St. Martin's 

 Road totals of 4'" 52 and 5"69 respectively. 



The Forest total is only 84% and the St. Peter's 87% of 

 that of the St. Martin's Road. 



