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000
CXUS55 KRIW 031803
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1053 AM MST WED JAN 03 2024

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
DECEMBER 2023...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2023 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 HAD RECORD WARM AND DRY IN DECEMBER...

THE AVERAGE TEMPERATURE FOR GREYBULL IN DECEMBER WAS 25.8 DEGREES
WHICH WAS 6.5 DEGREES ABOVE NORMAL. IT WAS THE WARMEST DECEMBER ON
RECORD...BREAKING THE 2004 MONTHLY RECORD OF 25.7 DEGREES. THE
WARMEST READING FOR THE MONTH WAS 49 DEGREES ON THE 21ST. THE
COLDEST TEMPERATURE WAS 0 DEGREES ON THE 25TH. NO DAILY TEMPERATURE
RECORDS WERE BROKEN THIS MONTH.

PRECIPITATION FOR THE MONTH WAS JUST A TRACE...WHICH IS ONLY 1
PERCENT OF NORMAL...AND THE DRIEST DECEMBER ON RECORD. THE PREVIOUS
MONTHLY RECORD WAS A TRACE FROM 2021, 2019 AND 2015. THE WETTEST 24-
HOUR PERIOD OCCURRED ON THE 3RD, 7TH AND 9TH WITH A TRACE. NO DAILY
PRECIPITATION RECORDS WERE BROKEN THIS MONTH. THE HIGHEST WIND GUST
WAS 60 MPH FROM THE NORTHWEST ON THE 23RD.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             63   12/11/2004
 LOW             -36   12/22/2022
HIGHEST           49   12/21
LOWEST             0   12/25
AVG. MAXIMUM    39.0               30.8     8.2
AVG. MINIMUM    12.6                7.9     4.7
MEAN            25.8               19.3     6.5
DAYS MAX >= 90     0
DAYS MAX <= 32     5
DAYS MIN <= 32    31
DAYS MIN <= 0      1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        0.49   1999
 MINIMUM        0.01   2021
TOTALS             TR              0.11   -0.11     0.03
DAILY AVG.         T               0.00   -0.00
DAYS >= .01        0
DAYS >= .10        0
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL      T   12/03 TO 12/03
                       12/07 TO 12/07
                       12/09 TO 12/09
 STORM TOTAL    0.00

DEGREE DAYS
HEATING TOTAL   1205               1415    -210
 SINCE 7/1      2810               3194    -384
COOLING TOTAL      0                  0       0
 SINCE 1/1       702                744     -42
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              3.7
RESULTANT WIND SPEED/DIRECTION   0/290
HIGHEST WIND SPEED/DIRECTION    44/340    DATE  12/23
HIGHEST GUST SPEED/DIRECTION    60/340    DATE  12/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.18
NUMBER OF DAYS FAIR           24
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                2     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

LOOKING AHEAD TO JANUARY 2023. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 29 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 6 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 30
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 7 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.15 INCHES.

$$