397
CXUS55 KRIW 012109
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
258 PM MDT MON SEP 01 2025

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
AUGUST 2025...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 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 AUGUST WAS DRIER AND WARMER THAN NORMAL....

THE AVERAGE TEMPERATURE FOR GREYBULL IN AUGUST WAS 73.8 DEGREES
WHICH IS 1.5 DEGREES ABOVE NORMAL. THE WARMEST TEMPERATURE FOR THE
MONTH WAS 101 DEGREES ON THE 19TH WHICH BROKE THE 1999 AND 2019
RECORDS OF 98. AND ALSO ON THE 20TH WHICH BROKE 98 DEGREES FROM
2024. THE COLDEST TEMPERATURE WAS 47 DEGREES ON THE 9TH AND BROKE
THE 2002 RECORD OF 50 DEGREES.

PRECIPITATION FOR THE MONTH WAS 0.17 INCHES...WHICH IS 74 PERCENT OF
NORMAL.THE WETTEST 24-HOUR PERIOD OCCURRED ON THE 1ST WITH 0.06
INCHES AND BROKE THE 2011 RECORD OF 0.02. THE HIGHEST WIND GUST WAS
63 MPH FROM THE SOUTHWEST ON THE 1ST.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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            105   08/12/2018
                       08/03/2001
                       07/16/2005
 LOW              36   08/31/2005
HIGHEST          101   08/19
                       08/20
LOWEST            47   08/09
AVG. MAXIMUM    90.2               88.8     1.4
AVG. MINIMUM    57.4               55.8     1.6
MEAN            73.8               72.3     1.5
DAYS MAX >= 90    16
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        1.29   2022
 MINIMUM           T   2013
TOTALS          0.17               0.23   -0.06     0.59
DAILY AVG.      0.01               0.01    0.00
DAYS >= .01        4
DAYS >= .10        0
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.06   08/01 TO 08/01
 STORM TOTAL    0.06

DEGREE DAYS
HEATING TOTAL      0                 15     -15
 SINCE 7/1         0                 16     -16
COOLING TOTAL    280                241      39
 SINCE 1/1       741                696      45
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
RESULTANT WIND SPEED/DIRECTION   2/320
HIGHEST WIND SPEED/DIRECTION    43/260    DATE  08/01
HIGHEST GUST SPEED/DIRECTION    63/240    DATE  08/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.11
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     41

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       1     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

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

LOOKING AHEAD TO SEPTEMBER 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 84 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 51 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 69
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 40 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.83 INCHES.

$$