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CXUS55 KRIW 011337
CLMLND

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
637 AM MST THU JAN 01 2026

...................................

...THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2025

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           65R  12/24
LOWEST             5   12/01
AVG. MAXIMUM    49.0               32.9    16.1
AVG. MINIMUM    24.1               10.2    13.9
MEAN            36.5               21.6    14.9
DAYS MAX >= 90     0
DAYS MAX <= 32     1
DAYS MIN <= 32    27
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.06   1909
 MINIMUM           T   1933
TOTALS          0.28               0.63   -0.35     0.04
DAILY AVG.      0.01               0.02   -0.01
DAYS >= .01        5
DAYS >= .10        1
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.18   12/02 TO 12/03
 STORM TOTAL    0.14

SNOWFALL (INCHES)
TOTALS           2.6                9.3    -6.7
SINCE 7/1        3.7               31.9   -28.2
SNOWDEPTH AVG.     0
DAYS >= 1.0        1

DEGREE DAYS
HEATING TOTAL    874               1347    -473
 SINCE 7/1      2244               3177    -933
COOLING TOTAL      0                  0       0
 SINCE 1/1       569                485      84
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.3
RESULTANT WIND SPEED/DIRECTION   3/240
HIGHEST WIND SPEED/DIRECTION    59/230    DATE  12/17
HIGHEST GUST SPEED/DIRECTION    92/180    DATE  12/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.13
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              3
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     54

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                5     SLEET                      0
FOG                       4     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.

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