405  
CXUS55 KRIW 021730  
CLMWRL  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE RIVERTON WY  
1111 AM MDT MON JUN 02 2025  
 
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR WORLAND MUNICIPAL AIRPORT  
FOR THE MONTH OF MAY 2025...  
 
...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2025 WILL BE AVAILABLE  
APPROXIMATELY IN 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  
   
..WORLAND WAS WARMER AND SLIGHTLY DRIER THAN NORMAL IN MAY  
 
AVERAGE TEMPERATURE FOR WORLAND IN MAY WAS 55.6 DEGREES WHICH IS 0.8  
DEGREES ABOVE NORMAL. THE WARMEST READING OF THE MONTH WAS 87  
DEGREES ON THE 12TH. THE COLDEST READING FOR THE MONTH WAS 29  
DEGREES ON THE 2ND. NO TEMPERATURE RECORDS WERE BROKEN THIS MONTH.  
 
TOTAL PRECIPITATION FOR THE MONTH WAS 1.61 INCHES...WHICH IS 97  
PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS  
ON THE 5TH-6TH WITH 0.58 INCHES. THE 13TH HAD 0.53 INCHES AND BROKE  
THE 2020 RECORD OF 0.28 INCHES. THE HIGHEST WIND GUST WAS 49 MPH  
FROM THE SOUTHWEST ON THE 11TH.  
   
..THE WORLAND WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2025  
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1947 TO 2025  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE  
NORMAL    
..........................................................  
 
TEMPERATURE (F)  
RECORD  
HIGH 98 05/27/1969  
LOW 20 05/09/2002  
HIGHEST 87 05/12  
LOWEST 29 05/02  
AVG. MAXIMUM 70.6 69.6 1.0  
AVG. MINIMUM 40.5 40.0 0.5  
MEAN 55.6 54.8 0.8  
DAYS MAX >= 90 0  
DAYS MAX <= 32 0  
DAYS MIN <= 32 2  
DAYS MIN <= 0 0  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 4.96 2019  
MINIMUM 0.06 1960  
TOTALS 1.61 1.66 -0.05 2.25  
DAILY AVG. 0.05 0.05 -0.00  
DAYS >= .01 11  
DAYS >= .10 5  
DAYS >= .50 1  
DAYS >= 1.00 0  
GREATEST  
24 HR. TOTAL 0.58 05/05 TO 05/06  
STORM TOTAL 0.53  
 
DEGREE DAYS  
HEATING TOTAL 286 325 -39  
SINCE 7/1 7309 7853 -544  
COOLING TOTAL 0 9 -9  
SINCE 1/1 0 9 -9    
..........................................................  
 
WIND (MPH)  
AVERAGE WIND SPEED 7.3  
RESULTANT WIND SPEED/DIRECTION 0/270  
HIGHEST WIND SPEED/DIRECTION 36/240 DATE 05/11  
HIGHEST GUST SPEED/DIRECTION 49/250 DATE 05/11  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.27  
NUMBER OF DAYS FAIR 19  
NUMBER OF DAYS PC 8  
NUMBER OF DAYS CLOUDY 2  
 
AVERAGE RH (PERCENT) 60  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 8 MIXED PRECIP 0  
HEAVY RAIN 0 RAIN 1  
LIGHT RAIN 14 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 0 SNOW 0  
LIGHT SNOW 1 SLEET 0  
FOG 5 FOG W/VIS <= 1/4 MILE 0  
HAZE 2  
 
- 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 76 DEGREES...AND THE AVERAGE LOW TEMPERATURE  
IS 45 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 86  
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 51 DEGREES. THE AVERAGE  
MONTHLY PRECIPITATION IS 0.97 INCHES.  
 
 
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