CDUS45 KRIW 180733
CLIP60

CLIMATE REPORT 
NATIONAL WEATHER SERVICE RIVERTON WY
133 AM MDT MON MAY 18 2026

...................................

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR MAY 17 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST      
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR     
                                                  NORMAL           
...................................................................
TEMPERATURE (F)                                                          
 YESTERDAY                                                           
  MAXIMUM         39   1:46 PM  69    2007  51    -12       48        
  MINIMUM         24   6:05 AM  18    1999  27     -3       32        
  AVERAGE         32                        39     -7       40     

PRECIPITATION (IN)                                                    
  YESTERDAY        0.01          0.50 2017   0.07  -0.06     0.12     
  MONTH TO DATE    0.09                      1.15  -1.06     0.84     
  SINCE MAR 1      4.01                      5.33  -1.32     3.92     
  SINCE JAN 1      7.36                      8.83  -1.47     7.62     

DEGREE DAYS                                                           
 HEATING                                                              
  YESTERDAY       33                        26      7       25        
  MONTH TO DATE  394                       488    -94      416        
  SINCE MAR 1   2466                      2934   -468     1611        
  SINCE JUL 1   9436                     11138  -1702     8531        

 COOLING                                                              
  YESTERDAY        0                         0      0        0        
  MONTH TO DATE    0                         0      0        0        
  SINCE MAR 1      0                         0      0        0        
  SINCE JAN 1      0                         0      0        0        
...................................................................


WIND (MPH)                                                            
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION    NW (310)       
  HIGHEST GUST SPEED    29   HIGHEST GUST DIRECTION     N (340)       
  AVERAGE WIND SPEED     4.6                                        


SKY COVER                                                             
  POSSIBLE SUNSHINE  MM                                                 
  AVERAGE SKY COVER 0.0                                                 


WEATHER CONDITIONS                                                    
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.                         
  NO SIGNIFICANT WEATHER WAS OBSERVED.                                  


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    81           2:00 AM                                      
 LOWEST     34           1:00 PM                                      
 AVERAGE    58                                                        

..........................................................


THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR                     
 MAXIMUM TEMPERATURE (F)   51        69      2007                      
                                             2009                     
 MINIMUM TEMPERATURE (F)   27        20      2003                      
                                             2011                     


SUNRISE AND SUNSET                                                    
MAY 18 2026...........SUNRISE   5:51 AM MDT   SUNSET   8:46 PM MDT     
MAY 19 2026...........SUNRISE   5:50 AM MDT   SUNSET   8:47 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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