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000
CXUS55 KRIW 031807
CLMLND

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER 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

...LANDER WAS WARMER AND WETTER THAN NORMAL IN DECEMBER....

THE AVERAGE TEMPERATURE FOR LANDER IN DECEMBER WAS 24.4 DEGREES
WHICH WAS 2.8 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 50 DEGREES ON THE 5TH. THE COLDEST TEMPERATURE WAS 1
DEGREE BELOW ZERO ON THE 25TH. NO TEMPERATURE RECORDS WERE BROKEN
THIS MONTH.

PRECIPITATION FOR THE MONTH WAS 0.71 INCHES...WHICH IS 113 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 23RD-24TH WHEN 0.68
INCHES OF PRECIPITATION FELL. THE 23RD HAD 0.59 INCHES AND BROKE THE
1987 RECORD OF 0.52.

SNOWFALL FOR THE MONTH WAS 8.1 INCHES WHICH IS 87 PERCENT OF NORMAL.
THE SNOWIEST 24-HOUR PERIOD WAS ON THE 23RD WHEN 6 INCHES FELL.
SNOWFALL FOR DECEMBER IS ESTIMATED BASED ON SURROUNDING
OBSERVATIONS. NO SNOWFALL RECORDS WERE BROKEN THIS MONTH.. THE
HIGHEST WIND GUST OCCURRED ON THE 7TH WITH 49 MPH FROM THE
NORTHWEST.

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

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             65   12/11/1937
                       12/10/1933
 LOW             -40   12/19/1924
HIGHEST           50   12/05
LOWEST                 12/25
AVG. MAXIMUM    34.1               32.9     1.2
AVG. MINIMUM    14.7               10.2     4.5
MEAN            24.4               21.6     2.8
DAYS MAX >= 90     0
DAYS MAX <= 32    14
DAYS MIN <= 32    31
DAYS MIN <= 0      1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.06   1909
 MINIMUM           T   1933
TOTALS          0.71               0.63    0.08     1.32
DAILY AVG.      0.02               0.02   -0.00
DAYS >= .01        3
DAYS >= .10        1
DAYS >= .50        1
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.68   12/23 TO 12/24
 STORM TOTAL    0.59

SNOWFALL (INCHES)
TOTALS           8.1                9.3    -1.2
SINCE 7/1       32.3               31.9     0.4
SNOWDEPTH AVG.     5
DAYS >= 1.0        2

DEGREE DAYS
HEATING TOTAL   1250               1347     -97
 SINCE 7/1      2858               3177    -319
COOLING TOTAL      0                  0       0
 SINCE 1/1       361                485    -124
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              3.6
RESULTANT WIND SPEED/DIRECTION   1/260
HIGHEST WIND SPEED/DIRECTION    37/310    DATE  12/07
HIGHEST GUST SPEED/DIRECTION    49/310    DATE  12/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.15
NUMBER OF DAYS FAIR           25
NUMBER OF DAYS PC              6
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                       1
LIGHT SNOW                5     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      3
HAZE                      3

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

LOOKING AHEAD TO JANUARY 2024. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 30 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 7 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 32
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 9. THE AVERAGE MONTHLY
PRECIPITATION IS 0.51 INCHES. THE AVERAGE SNOWFALL IS 8.2 INCHES.

$$