827
CXUS55 KRIW 021711
CLMGEY

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

...................................

...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.

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