065
CXUS55 KRIW 011639
CLMBYG
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1032 AM MDT MON JUN 01 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BUFFALO FOR THE MONTH OF
MAY 2026...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2026 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
...BUFFALO WAS WARMER AND DRIER THAN NORMAL IN MAY..
THE AVERAGE TEMPERATURE FOR BUFFALO IN MAY WAS 54.1 DEGREES WHICH
WAS 2.1 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE MONTH WAS
93 DEGREES ON THE 13TH. THIS BROKE THE 2001 RECORD OF 91. IT ALSO
SETS A NEW ALL-TIME RECORD HIGH FOR MAY. THE 25TH HIT 84 AND BROKE
83 FROM 2006. THE 27TH HIGH OF 84 TIED 2010. THE 29TH HIT 84 AND
BROKE 83 FROM 2003. THE COLDEST READING OF THE MONTH WAS 21 DEGREES
ON THE 6TH AND BROKE THE 2010 RECORD OF 27. THE 5TH LOW OF 27 BROKE
25 FROM 2006. THE 18TH DROPPED TO 27 AND BROKE 30 FROM 2019. THE
19TH LOW OF 22 BROKE 28 DEGREES FROM 2003.
PRECIPITATION FOR THE MONTH WAS 0.73 INCHES...WHICH IS 27 PERCENT OF
NORMAL. IT WAS THE 3RD DRIEST MAY ON RECORD. THE WETTEST 24-HOUR
PERIOD WAS ON THE 30TH-31ST WITH 0.33 INCHES. THERE WERE NO
PRECIPITATION RECORDS BROKEN THIS MONTH. THE HIGHEST WIND GUST WAS
56 MPH OCCURRING ON THE 17TH FROM THE NORTHWEST. THERE WAS ALSO A
GUST TO 54 MPH FROM THE NORTHWEST ON THE 16TH.
..THE BUFFALO WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 91 05/13/2001
LOW 17 05/02/2005
HIGHEST 93R 05/13
LOWEST 21 05/06
AVG. MAXIMUM 67.6 62.8 4.8
AVG. MINIMUM 40.5 41.1 -0.6
MEAN 54.1 52.0 2.1
DAYS MAX >= 90 1
DAYS MAX <= 32 0
DAYS MIN <= 32 5
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 6.74 2011
MINIMUM 0.31 2009
TOTALS 0.73 2.73 -2.00 2.79
DAILY AVG. 0.02 0.09 -0.07
DAYS >= .01 8
DAYS >= .10 4
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.33 05/30 TO 05/31
STORM TOTAL 0.22
DEGREE DAYS
HEATING TOTAL 359 412 -53
SINCE 7/1 5777 7138 -1361
COOLING TOTAL 28 7 21
SINCE 1/1 28 7 21
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 11.3
RESULTANT WIND SPEED/DIRECTION 4/320
HIGHEST WIND SPEED/DIRECTION 38/340 DATE 05/16
HIGHEST GUST SPEED/DIRECTION 56/330 DATE 05/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.27
NUMBER OF DAYS FAIR 22
NUMBER OF DAYS PC 5
NUMBER OF DAYS CLOUDY 4
AVERAGE RH (PERCENT) 48
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 11 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 1
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO JUNE 2026. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 68 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 46 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 80
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 54 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 2.07 INCHES.
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