086
CXUS55 KRIW 011729
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1107 AM MDT TUE SEP 01 2026

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
AUGUST 2026...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 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

...GREYBULL IN AUGUST WAS DRIER AND WARMER THAN NORMAL....

THE AVERAGE TEMPERATURE FOR GREYBULL IN AUGUST WAS 72.8 DEGREES
WHICH IS 0.5 DEGREES ABOVE NORMAL. THE WARMEST TEMPERATURE FOR THE
MONTH WAS 105 DEGREES ON THE 1ST. THIS BROKE THE 2008 RECORD OF 104.
THIS ALSO TIED THE ALL-TIME AUGUST HIGH TEMPERATURE. THE COLDEST
TEMPERATURE WAS 42 DEGREES ON THE 31ST. THE LOW OF 49 ON THE 5TH
TIED 2012.

PRECIPITATION FOR THE MONTH WAS 0.18 INCHES...WHICH IS 78 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD HAD 0.08 INCHES ON THE 14TH. THE
17TH HAD 0.02 INCHES AND TIED 2003. THE HIGHEST WIND GUST WAS 55
MPH. IT OCCURRED ON THE 23RD FROM THE NORTHWEST.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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            105   08/12/2018
                       08/03/2001
                       07/16/2005
 LOW              36   08/31/2005
HIGHEST          105R  08/01
LOWEST            42   08/31
AVG. MAXIMUM    89.3               88.8     0.5
AVG. MINIMUM    56.3               55.8     0.5
MEAN            72.8               72.3     0.5
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          0.18               0.23   -0.05     0.17
DAILY AVG.      0.01               0.01    0.00
DAYS >= .01        5
DAYS >= .10        0
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.08   08/14 TO 08/14
 STORM TOTAL    0.08


DEGREE DAYS
HEATING TOTAL      2                 15     -13
 SINCE 7/1         2                 16     -14
COOLING TOTAL    252                241      11
 SINCE 1/1       798                696     102
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.8
RESULTANT WIND SPEED/DIRECTION   1/330
HIGHEST WIND SPEED/DIRECTION    41/330    DATE  08/23
HIGHEST GUST SPEED/DIRECTION    55/330    DATE  08/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.12
NUMBER OF DAYS FAIR           25
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     44

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               10     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                      7

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

LOOKING AHEAD TO SEPTEMBER 2026. 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.

$$