064  
CDUS45 KRIW 170045  
CLICPR  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
645 PM MDT FRI MAY 16 2025  
   
...............................
 
 
   
..THE CASPER WY CLIMATE SUMMARY FOR MAY 16 2025
 
 
VALID TODAY AS OF 0600 PM LOCAL TIME.  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1939 TO 2025  
 
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST  
VALUE (LST) VALUE VALUE FROM YEAR  
NORMAL    
...............................................................
 
 
TEMPERATURE (F)  
TODAY  
MAXIMUM 63 2:37 PM 88 2012 67 -4 75  
MINIMUM 37 4:26 AM 25 2009 37 0 38  
AVERAGE 50 52 -2 57  
 
PRECIPITATION (IN)  
TODAY 0.00 0.80 1991 0.07 -0.07 0.00  
MONTH TO DATE 0.41 1.13 -0.72 1.85  
SINCE MAR 1 3.33 3.38 -0.05 3.64  
SINCE JAN 1 4.05 4.43 -0.38 4.67  
 
SNOWFALL (IN)  
TODAY MM 0.0 MM 0.0  
MONTH TO DATE 0.3 2.0 -1.7 3.9  
SINCE MAR 1 16.0 22.8 -6.8 13.2  
SINCE JUL 1 26.5 71.1 -44.6 42.5  
SNOW DEPTH MM  
 
DEGREE DAYS  
HEATING  
TODAY 15 13 2 8  
MONTH TO DATE 200 258 -58 281  
SINCE MAR 1 1749 1847 -98 1807  
SINCE JUL 1 6764 7209 -445 6762  
 
COOLING  
TODAY 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 23 HIGHEST WIND DIRECTION W (280)  
HIGHEST GUST SPEED 32 HIGHEST GUST DIRECTION W (280)  
AVERAGE WIND SPEED 15.5  
 
SKY COVER  
POSSIBLE SUNSHINE MM  
AVERAGE SKY COVER 0.2  
 
WEATHER CONDITIONS  
THE FOLLOWING WEATHER WAS RECORDED TODAY.  
NO SIGNIFICANT WEATHER WAS OBSERVED.  
 
RELATIVE HUMIDITY (PERCENT)  
HIGHEST 89  
LOWEST 25  
AVERAGE 57  
   
......................................................
 
 
THE CASPER WY CLIMATE NORMALS FOR TOMORROW  
NORMAL RECORD YEAR  
MAXIMUM TEMPERATURE (F) 67 87 1948  
MINIMUM TEMPERATURE (F) 38 28 1942  
1986  
1990  
 
SUNRISE AND SUNSET  
MAY 16 2025...........SUNRISE 5:41 AM MDT SUNSET 8:24 PM MDT  
MAY 17 2025...........SUNRISE 5:41 AM MDT SUNSET 8:25 PM MDT  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab WY Page Main Text Page