Climatological Report (Monthly)
Issued by NWS

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CXUS55 KRIW 011820
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1103 AM MST WED FEB 01 2023

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LAKE YELLOWSTONE FOR THE
MONTH OF JANUARY 2023...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF JANUARY 2023 WILL BE
AVAILABLE APPROXIMATELY IN 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

...LAKE YELLOWSTONE WAS COLDER AND DRIER THAN NORMAL IN JANUARY...

AVERAGE TEMPERATURE FOR LAKE YELLOWSTONE IN JANUARY WAS 10.1 DEGREES
WHICH WAS 1.9 DEGREES BELOW NORMAL. THE WARMEST READING OF THE MONTH
WAS 32 DEGREES ON THE 14TH. THE 10TH HIGH OF 31 DEGREES TIED 2015.
THE COLDEST READING WAS 42 DEGREES BELOW ZERO ON THE 30TH...WHICH
BROKE THE 2002 RECORD OF 29 BELOW. IT ALSO SET A NEW ALL-TIME
MONTHLY LOW FOR JANUARY. THE 29TH HIT 34 BELOW AND BROKE THE 2019
RECORD OF 23 BELOW. THE 31ST HIT 29 BELOW AND BROKE THE 2000 RECORD
OF 22 BELOW ZERO.

TOTAL PRECIPITATION AT LAKE YELLOWSTONE WAS 1.53 INCHES... WHICH WAS
85 PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH
WAS THE 11TH WHEN 0.32 INCHES OF PRECIPITATION FELL. THE 27TH HAD
0.28 INCHES WHICH BROKE THE 2003 RECORD OF 0.23. THE HIGHEST WIND
GUST WAS 24 MPH FROM THE SOUTHWEST ON THE 8TH.

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF JANUARY
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             42   01/27/2015
                       01/20/2005
                       01/16/1974
 LOW             -42   01/30/2023
HIGHEST           32   01/14
LOWEST           -42R  01/30
AVG. MAXIMUM    20.1               23.0    -2.9
AVG. MINIMUM     0.2                1.0    -0.8
MEAN            10.1               12.0    -1.9
DAYS MAX >= 90     0
DAYS MAX <= 32    30
DAYS MIN <= 32    30
DAYS MIN <= 0     15

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.81   2020
 MINIMUM        0.14   2009
TOTALS          1.53               1.80   -0.27     1.15
DAILY AVG.      0.05               0.06   -0.01
DAYS >= .01       15
DAYS >= .10        5
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.32   01/11 TO 01/11
 STORM TOTAL    0.32


DEGREE DAYS
HEATING TOTAL   1640               1643      -3
 SINCE 7/1      6460               6762    -302
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              0.7
RESULTANT WIND SPEED/DIRECTION   0/100
HIGHEST WIND SPEED/DIRECTION    13/270    DATE  01/08
HIGHEST GUST SPEED/DIRECTION    24/240    DATE  01/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           30
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     83

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                       1
LIGHT SNOW                9     SLEET                      0
FOG                       0     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 FEBRUARY 2023...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 23 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 0 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 30 DEGREES
AND THE AVERAGE LOW TEMPERATURE IS 3 DEGREES. THE AVERAGE MONTHLY
PRECIPITATION IS 1.70 INCHES.

$$


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