745
CXUS55 KRIW 021722
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1111 AM MDT MON JUN 02 2025

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL 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

...GREYBULL IN MAY WAS WARMER AND WETTER THAN NORMAL....

THE AVERAGE TEMPERATURE FOR GREYBULL IN MAY WAS 58.9 DEGREES WHICH
IS 1.9 DEGREES ABOVE NORMAL. THE WARMEST TEMPERATURE FOR THE MONTH
WAS 89 DEGREES ON THE 11TH. THIS BROKE THE 2007 RECORD OF 85. THE
4TH HIGH OF 85 TIED 2004. THE HIGH ON THE 10TH OF 87 BROKE 82
DEGREES FROM 2007. THE COLDEST TEMPERATURE WAS 34 DEGREES ON THE 2ND.

PRECIPITATION FOR THE MONTH WAS 1.58 INCHES...WHICH IS 119 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD OCCURRED ON THE 13TH-14TH WITH
0.83 INCHES. THE 13TH HAD 0.60 INCHES AND BROKE THE 2018 RECORD OF
0.06. THE 11TH HAD 0.40 INCHES AND TIED 2005. THE HIGHEST WIND GUST
WAS 61 MPH FROM THE NORTHWEST ON THE 11TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             98   05/29/2003
 LOW              20   05/09/2002
HIGHEST           89   05/11
LOWEST            34   05/02
AVG. MAXIMUM    73.5               70.4     3.1
AVG. MINIMUM    44.2               43.6     0.6
MEAN            58.9               57.0     1.9
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.32   2010
 MINIMUM        0.19   2001
TOTALS          1.58               1.33    0.25     1.91
DAILY AVG.      0.05               0.04    0.01
DAYS >= .01       10
DAYS >= .10        4
DAYS >= .50        1
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.83   05/13 TO 05/14
 STORM TOTAL    0.60


DEGREE DAYS
HEATING TOTAL    204                271     -67
 SINCE 7/1      6969               7486    -517
COOLING TOTAL     21                 23      -2
 SINCE 1/1        21                 24      -3
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.6
RESULTANT WIND SPEED/DIRECTION   3/320
HIGHEST WIND SPEED/DIRECTION    44/300    DATE  05/13
HIGHEST GUST SPEED/DIRECTION    61/300    DATE  05/11

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.24
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       3
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

-  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 49 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 87
DEGREES... AND THE AVERAGE LOW TEMPERATURE IS 56 DEGREES. THE
AVERAGE MONTHLY PRECIPITATION IS 1.08 INCHES.

$$