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CXUS55 KRIW 011337
CLMCPR

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

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

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

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             66   12/02/2021
 LOW             -42   12/22/2022
HIGHEST           63   12/23
                       12/24
LOWEST           -10   12/28
AVG. MAXIMUM    48.1               34.7    13.4
AVG. MINIMUM    25.6               14.8    10.8
MEAN            36.9               24.8    12.1
DAYS MAX >= 90     0
DAYS MAX <= 32     3
DAYS MIN <= 32    24
DAYS MIN <= 0      1

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.71   1982
 MINIMUM        0.03   1952
TOTALS          0.36               0.61   -0.25     0.16
DAILY AVG.      0.01               0.02   -0.01
DAYS >= .01        6
DAYS >= .10        2
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.15   12/26 TO 12/27
 STORM TOTAL    0.13

SNOWFALL (INCHES)
TOTALS           5.5               11.0    -5.5
SINCE 7/1        9.8               28.4   -18.6
SNOWDEPTH AVG.     0
DAYS >= 1.0        4

DEGREE DAYS
HEATING TOTAL    863               1248    -385
 SINCE 7/1      2289               3048    -759
COOLING TOTAL      0                  0       0
 SINCE 1/1       467                443      24
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              17.1
RESULTANT WIND SPEED/DIRECTION  15/230
HIGHEST WIND SPEED/DIRECTION    58/250    DATE  12/19
HIGHEST GUST SPEED/DIRECTION    78/290    DATE  12/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.23
NUMBER OF DAYS FAIR           22
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     56

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               10     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

$$