952  
CXUS55 KRIW 021717  
CLMBPI  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1111 AM MDT MON JUN 02 2025  
 
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BIG PINEY FOR THE MONTH  
OF MAY 2025...  
 
...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2025 WILL BE AVAILABLE  
IN APPROXIMATELY 60 DAYS FROM THE NATIONAL CENTERS FOR ENVIRONMENTAL  
INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-WEB/DATASETS). UNOFFICIAL  
ASOS DAILY SUMMARIES ARE AVAILABLE ON THE INTERNET AT  
HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW  
   
..BIG PINEY WAS WARMER AND DRIER THAN NORMAL IN MAY
 
 
THE AVERAGE TEMPERATURE FOR BIG PINEY IN MAY WAS 47.8 DEGREES WHICH  
WAS 2.5 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS  
81 DEGREES ON THE 31ST. THE 10TH HIGH OF 76 DEGREES TIED THE 1994  
RECORD. THE COLDEST TEMPERATURE WAS 19 DEGREES ON THE 16TH. THE LOW  
ON THE 15TH OF 24 DEGREES TIED THE 1977 RECORD.  
 
PRECIPITATION FOR THE MONTH WAS 0.66 INCHES...WHICH IS 54 PERCENT OF  
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 17TH-18TH WITH 0.42  
INCHES. THE 18TH HAD 0.35 INCHES AND BROKE THE 2018 RECORD OF 0.32  
INCHES. THE HIGHEST WIND GUST WAS 54 MPH OCCURRING ON THE 11TH FROM  
THE WEST.  
   
..THE BIG PINEY WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2025
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1976 TO 2025  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE  
NORMAL    
..........................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 87 05/11/2007  
LOW 0 05/14/1984  
HIGHEST 81 05/31  
LOWEST 19 05/16  
AVG. MAXIMUM 65.5 61.8 3.7  
AVG. MINIMUM 30.1 28.9 1.2  
MEAN 47.8 45.3 2.5  
DAYS MAX >= 90 0  
DAYS MAX <= 32 0  
DAYS MIN <= 32 20  
DAYS MIN <= 0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 3.99 2016  
MINIMUM 0.08 2020  
TOTALS 0.66 1.22 -0.56 0.70  
DAILY AVG. 0.02 0.04 -0.02  
DAYS >= .01 6  
DAYS >= .10 2  
DAYS >= .50 0  
DAYS >= 1.00 0  
GREATEST  
24 HR. TOTAL 0.42 05/17 TO 05/18  
STORM TOTAL 0.35  
 
DEGREE DAYS  
HEATING TOTAL 523 609 -86  
SINCE 7/1 9414 10080 -666  
COOLING TOTAL 0 0 0  
SINCE 1/1 0 0 0    
..........................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 8.1  
RESULTANT WIND SPEED/DIRECTION 3/320  
HIGHEST WIND SPEED/DIRECTION 39/280 DATE 05/11  
39/280 05/13  
HIGHEST GUST SPEED/DIRECTION 54/270 DATE 05/11  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.29  
NUMBER OF DAYS FAIR 18  
NUMBER OF DAYS PC 10  
NUMBER OF DAYS CLOUDY 1  
 
AVERAGE RH (PERCENT) 54  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 4 MIXED PRECIP 0  
HEAVY RAIN 0 RAIN 2  
LIGHT RAIN 14 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 0 SNOW 0  
LIGHT SNOW 1 SLEET 0  
FOG 4 FOG W/VIS <= 1/4 MILE 0  
HAZE 0  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 
LOOKING AHEAD TO JUNE 2025. THE AVERAGE HIGH TEMPERATURE ON THE  
FIRST OF THE MONTH IS 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE  
IS 34 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 78  
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 39 DEGREES. THE AVERAGE  
MONTHLY PRECIPITATION IS 1.01 INCHES.  
 

 
 
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