Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 010925
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
201 AM MDT MON JUN 1 2015

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR SOUTH BIG HORN COUNTY
AIRPORT NEAR GREYBULL FOR THE MONTH OF MAY 2015...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF MAY 2015 WILL BE
AVAILABLE APPROXIMATELY IN JULY 2015 FROM THE NATIONAL CLIMATIC
DATA CENTER (WWW.NCDC.NOAA.GOV). UNOFFICIAL ASOS DAILY SUMMARIES ARE
ONLINE AT WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW..

...MAY WAS SLIGHTLY COOLER AND DRIER THAN AVERAGE IN GREYBULL...

THE AVERAGE TEMPERATURE FOR GREYBULL IN MAY WAS 56.1 DEGREES...
WHICH WAS 0.5 DEGREES BELOW NORMAL. THE WARMEST READING FOR THE MONTH
WAS 84 DEGREES ON THE 31ST. THE COLDEST READING WAS 27 DEGREES ON
THE 11TH...WHICH SET A NEW DAILY RECORD LOW TEMPERATURE. THERE WERE
NO OTHER TEMPERATURE RECORDS DURING THE MONTH OF MAY.

TOTAL PRECIPITATION FOR THE MONTH WAS 1.07 INCHES...WHICH WAS 65
PERCENT OF NORMAL. THIS WAS THE 9TH WETTEST MAY ON SINCE RECORDS
BEGAN IN 1999. THE WETTEST MAY OCCURRED IN 2010...WHEN 3.32 INCHES
FELL. THE WETTEST DAY WAS ON THE 15TH WHEN 0.29 INCHES OF
PRECIPITATION FELL. NEW DAILY PRECIPITATION RECORDS FOR THE MONTH OF
MAY INCLUDE 0.12 INCHES ON THE 14TH...AND 0.29 INCHES ON THE 15TH.
THE HIGHEST WIND GUST WAS 46 MPH ON THE 17TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              98   05/29/2003
 LOW               20   05/09/2002
HIGHEST            84   05/31
LOWEST             27   05/11
AVG. MAXIMUM     67.6              70.4    -2.8
AVG. MINIMUM     44.5              42.7     1.8
MEAN             56.1              56.6    -0.5
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      1
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.32   2010
 MINIMUM         0.19   2001
TOTALS           1.07              1.65   -0.58
DAILY AVG.       0.03              0.05   -0.02
DAYS >= .01        13
DAYS >= .10         4
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.29   05/15 TO 05/15
                        05/14 TO 05/15
                        05/15 TO 05/15

DEGREE_DAYS
HEATING TOTAL     274               281      -7
 SINCE 7/1       7119              7680    -561
COOLING TOTAL       5                19     -14
 SINCE 1/1          5                20     -15
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
HIGHEST WIND SPEED/DIRECTION    37/340    DATE  05/17
HIGHEST GUST SPEED/DIRECTION    46/330    DATE  05/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           14
NUMBER OF DAYS PC              8
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               19     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.

LOOKING AHEAD TO JUNE 2015...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 76 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 48 DEGREES. THE AVERAGE HIGH TEMPERATURE BY THE END OF THE MONTH
IS 91 DEGREES...AND THE AVERAGE LOW IS 60 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 1.20 INCHES.

$$










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