400  
CDUS42 KJAX 220543  
CLISSI  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE JACKSONVILLE FL  
143 AM EDT THU APR 22 2021  
   
...............................
 
 
   
..THE ST SIMONS ISLAND CLIMATE SUMMARY FOR APRIL 21 2021
 
 
CLIMATE NORMAL PERIOD: 1981 TO 2010  
CLIMATE RECORD PERIOD: 1940 TO 2021  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 85 4:13 PM 93 2002 76 9 83  
MINIMUM 61 11:59 PM 40 1953 59 2 60  
AVERAGE 73 68 5 72  
 
PRECIPITATION (IN)  
YESTERDAY 0.00 2.10 1992 0.08 -0.08 0.00  
MONTH TO DATE 0.94 1.88 -0.94 4.70  
SINCE MAR 1 3.98 5.76 -1.78 7.41  
SINCE JAN 1 11.29 12.45 -1.16 11.47  
 
SNOWFALL (IN)  
YESTERDAY 0.0 0.0 MM  
 
DEGREE DAYS  
HEATING  
YESTERDAY 0 1 -1 0  
MONTH TO DATE 40 48 -8 15  
SINCE MAR 1 162 225 -63 74  
SINCE JUL 1 1167 1476 -309 937  
 
COOLING  
YESTERDAY 8 4 4 7  
MONTH TO DATE 82 59 23 109  
SINCE MAR 1 164 90 74 280  
SINCE JAN 1 178 99 79 337    
...............................................................
 
 
WIND (MPH)  
HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION W (270)  
HIGHEST GUST SPEED 29 HIGHEST GUST DIRECTION NW (330)  
AVERAGE WIND SPEED 9.5  
 
SKY COVER  
AVERAGE SKY COVER 0.0  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 93 2:00 AM  
LOWEST 27 5:00 PM  
AVERAGE 60  
   
......................................................
 
 
THE ST SIMONS ISLAND CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 76 90 2002  
MINIMUM TEMPERATURE (F) 60 43 1962  
 
SUNRISE AND SUNSET  
APRIL 22 2021.........SUNRISE 6:50 AM EDT SUNSET 7:59 PM EDT  
APRIL 23 2021.........SUNRISE 6:49 AM EDT SUNSET 8:00 PM EDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
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