699
CXUS55 KRIW 011655
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1055 AM MDT FRI MAY 01 2026

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

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             84   04/30/1992
 LOW              -6   04/12/1997
HIGHEST           81   04/21
LOWEST            20   04/05
AVG. MAXIMUM    59.3               56.3     3.0
AVG. MINIMUM    28.8               28.2     0.6
MEAN            44.0               42.3     1.8
DAYS MAX >= 90     0
DAYS MAX <= 32     1
DAYS MIN <= 32    22
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.75   1941
 MINIMUM        0.08   1992
TOTALS          1.28               1.41   -0.13     1.59
DAILY AVG.      0.04               0.05   -0.01
DAYS >= .01        8
DAYS >= .10        5
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.56   04/16 TO 04/17
 STORM TOTAL    0.44

SNOWFALL (INCHES)
TOTALS           9.8               10.5    -0.7
SINCE 7/1       27.1               69.1   -42.0
SNOWDEPTH AVG.     0
DAYS >= 1.0        4

DEGREE DAYS
HEATING TOTAL    620                682     -62
 SINCE 7/1      5383               6953   -1570
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              12.1
RESULTANT WIND SPEED/DIRECTION   5/250
HIGHEST WIND SPEED/DIRECTION    53/220    DATE  04/22
HIGHEST GUST SPEED/DIRECTION    67/200    DATE  04/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.34
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     55

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                1     SNOW                       2
LIGHT SNOW               10     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      3
HAZE                      2

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

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