743
CXUS55 KRIW 011632
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1032 AM MDT MON JUN 01 2026

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

...THE GREYBULL 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             98   05/29/2003
 LOW              20   05/09/2002
HIGHEST           96   05/13
LOWEST            25   05/06
AVG. MAXIMUM    73.7               70.4     3.3
AVG. MINIMUM    42.5               43.6    -1.1
MEAN            58.1               57.0     1.1
DAYS MAX >= 90     3
DAYS MAX <= 32     0
DAYS MIN <= 32     5
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.32   2010
 MINIMUM        0.19   2001
TOTALS          0.48               1.33   -0.85     1.58
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   0.12   05/21 TO 05/21
 STORM TOTAL    0.12


DEGREE DAYS
HEATING TOTAL    252                271     -19
 SINCE 7/1      5759               7486   -1727
COOLING TOTAL     46                 23      23
 SINCE 1/1        46                 24      22
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              9.3
RESULTANT WIND SPEED/DIRECTION   3/320
HIGHEST WIND SPEED/DIRECTION    41/290    DATE  05/13
HIGHEST GUST SPEED/DIRECTION    63/290    DATE  05/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.19
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     44

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                6     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                      1

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

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