THE SUNSHINE OF GUERNSEY FOR THE 

 YEAR 1920. 



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

 Director of the States Meteorological Station. 



The year has a total of 1,847 hours, which is 47 hours 

 lower than the average of the 27 years during which sunshine 

 has been recorded. 



The monthly totals have fallen below their averages in 

 five of the twelve months and have risen above in the remain- 

 ing seven months. There are three months which, owing to 

 their large deficits, may well be called gloomy months. These 

 were : April with a deficit of 36 hours ; July with 63 hours 

 and September with 50. The months having excess of sun- 

 shine to justify the term " sunny " were four in number, each 

 with over 20 hours excess. These were March with 21, 

 August with 23, October with 22 and November Avith 20 

 hours. The remaining months were so near their averages as 

 to render them practically normal. 



The months with deficits had differences from their 

 averages of 162 hours and those with excesses gave a com- 

 bined total of 115 hours, a difference of 47 hours, which is the 

 deficit of the year. The gloominess of July, as compared 

 with June and August, is worthy of attention. The two 

 months spoken of had totals of 260 and 264 hours respectively, 

 but July failed to reach 200 hours, having a total of 196 

 hours only. The month w r as a wet one and, as it frequently 

 happens, the days were more cloudy than the nights. 



The three months of which we are speaking have 

 averages 245, 259 and 241 hours respectively, which gives 

 them daily mean values of 8 hours nearly. July this year 

 gives a daily mean value of 6 "3 hours only. 



The abnormal gloom of July is also shown by lowered 

 proportion of its sunshine to the annual total. The month 

 should contribute 14% of the year's total as do the months of 

 June and August, but it only contributed 10*5%. 



