616  
CDUS45 KBOU 190731  
CLIBDU  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE DENVER/BOULDER  
131 AM MDT FRI SEP 19 2025  
   
...............................  
 
   
..THE BOULDER AIRPORT CLIMATE SUMMARY FOR SEPTEMBER 18 2025  
 
CLIMATE NORMAL PERIOD 1991 TO 2020  
CLIMATE RECORD PERIOD 9999 TO 9999  
 
WEATHER ITEM OBSERVED NORMAL DEPARTURE LAST  
VALUE VALUE FROM YEAR  
NORMAL    
............................................  
 
TEMPERATURE (F)  
YESTERDAY  
MAXIMUM 73 78 -5 82  
MINIMUM 46 48 -2 48  
AVERAGE 60 63 -3 65  
 
DEGREE DAYS  
HEATING  
YESTERDAY 5  
MONTH TO DATE 27  
 
COOLING  
YESTERDAY 0  
MONTH TO DATE 73    
............................................  
 
WIND (MPH)  
RESULTANT WIND SPEED 1 RESULTANT WIND DIRECTION E (100)  
HIGHEST WIND SPEED 8 HIGHEST WIND DIRECTION E (90)  
HIGHEST GUST SPEED MM HIGHEST GUST DIRECTION MM  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.1  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST MM  
LOWEST MM  
AVERAGE MM  
   
......................................................  
 
THE BOULDER AIRPORT CLIMATE NORMALS FOR TODAY  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 78 MM MM  
MINIMUM TEMPERATURE (F) 47 MM MM  
 
SUNRISE AND SUNSET  
SEPTEMBER 19 2025.....SUNRISE 646 AM MDT SUNSET 702 PM MDT  
SEPTEMBER 20 2025.....SUNRISE 647 AM MDT SUNSET 701 PM MDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
 
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