Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011732
CLMRKS

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1032 AM MST SAT JAN 01 2022

..PRELIMINARY MONTHLY CLIMATE SUMMARY FOR ROCK SPRINGS FOR THE MONTH
OF DECEMBER 2021...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 2021 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

...ROCK SPRINGS WAS DRIER AND WARMER THAN NORMAL IN DECEMBER...

THE AVERAGE TEMPERATURE FOR ROCK SPRINGS IN DECEMBER WAS 27 DEGREES
WHICH WAS 5.6 DEGREES ABOVE NORMAL. THIS WAS THE 8TH WARMEST
DECEMBER WITH RECORDS GOING BACK TO 1948. THE WARMEST READING FOR
THE MONTH WAS 58 DEGREES ON THE 2ND...WHICH BROKE THE 2008 RECORD OF
52. THE 4TH HIT 54...WHICH BROKE THE 1975 RECORD OF 50 DEGREES. THE
COLDEST TEMPERATURE WAS 2 DEGREES ON THE 29TH.

PRECIPITATION FOR THE MONTH WAS 0.24 INCHES...WHICH IS 77 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 23RD AND 24TH WHEN
0.14 INCHES FELL. NO PRECIPITATION RECORDS WERE BROKEN THIS MONTH.
THE HIGHEST WIND GUST WAS 74 MPH FROM THE WEST ON THE 25TH.

...THE ROCK SPRINGS WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1948 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             58   12/16/2013
 LOW             -29   12/22/1990
                       12/21/1990
                       12/31/1978
HIGHEST           58R  12/02
LOWEST             2   12/29
AVG. MAXIMUM    36.2               29.5     6.7
AVG. MINIMUM    17.9               13.4     4.5
MEAN            27.0               21.4     5.6
DAYS MAX >= 90     0
DAYS MAX <= 32    10
DAYS MIN <= 32    29
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        1.78   1975
 MINIMUM        0.00   1962
TOTALS          0.24               0.31   -0.07     0.01
DAILY AVG.      0.01               0.01    0.00
DAYS >= .01        8
DAYS >= .10        1
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.14   12/23 TO 12/24
 STORM TOTAL    0.12

SNOWFALL (INCHES)
TOTALS            MM                5.8      MM
SINCE 7/1         MM               19.6      MM
SNOWDEPTH AVG.    MM
DAYS >= 1.0       MM

DEGREE DAYS
HEATING TOTAL   1174               1350    -176
 SINCE 7/1      2841               3297    -456
COOLING TOTAL      0                  0       0
 SINCE 1/1       527                320     207
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              15.0
RESULTANT WIND SPEED/DIRECTION  13/240
HIGHEST WIND SPEED/DIRECTION    53/250    DATE  12/25
HIGHEST GUST SPEED/DIRECTION    74/250    DATE  12/25

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.34
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     60

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                3     SNOW                       9
LIGHT SNOW               14     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      5
HAZE                      5

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

LOOKING AHEAD TO JANUARY 2022...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 29 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 13 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 30
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 14. THE AVERAGE MONTHLY
PRECIPITATION IS 0.38 INCHES.

$$


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