591
CXUS55 KRIW 012106
CLMCPR

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
258 PM MDT MON SEP 01 2025

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR CASPER FOR THE MONTH OF
AUGUST 2025...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF AUGUST 2025 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

...AUGUST WAS SLIGHTLY WARMER AND DRIER THAN NORMAL FOR CASPER...

AVERAGE TEMPERATURE FOR CASPER IN AUGUST WAS 69.2 DEGREES WHICH IS
0.2 DEGREE ABOVE NORMAL. THE WARMEST READING OF THE MONTH WAS 99
DEGREES ON THE 20TH. THIS BROKE THE 1973 RECORD OF 97. THE COLDEST
READING FOR THE MONTH WAS 39 DEGREES ON THE 9TH AND BROKE THE 1995
RECORD OF 41..

TOTAL PRECIPITATION FOR THE MONTH WAS 0.72 INCHES...WHICH IS 91
PERCENT OF NORMAL. THE WETTEST 24-HOUR PERIOD DURING THE MONTH WAS
ON THE 27TH WITH 0.44 INCHES AND BROKE THE 1978 RECORD OF 0.24
INCHES. THE HIGHEST WIND GUST WAS 54 MPH FROM THE WEST ON THE 15TH.

...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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            102   08/05/1979
 LOW              29   08/23/2015
HIGHEST           99   08/20
LOWEST            39   08/09
AVG. MAXIMUM    87.2               86.7     0.5
AVG. MINIMUM    51.3               51.4    -0.1
MEAN            69.2               69.0     0.2
DAYS MAX >= 90    12
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.79   1941
 MINIMUM        0.02   1950
TOTALS          0.72               0.79   -0.07     0.39
DAILY AVG.      0.02               0.03   -0.01
DAYS >= .01        5
DAYS >= .10        2
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.44   08/27 TO 08/27
 STORM TOTAL    0.44

SNOWFALL (INCHES)
TOTALS           0.0                0.0     0.0
SINCE 7/1        0.0                0.0     0.0
SNOWDEPTH AVG.     0
DAYS >= 1.0        0

DEGREE DAYS
HEATING TOTAL      5                 31     -26
 SINCE 7/1        10                 42     -32
COOLING TOTAL    148                157      -9
 SINCE 1/1       450                412      38
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.1
RESULTANT WIND SPEED/DIRECTION   1/310
HIGHEST WIND SPEED/DIRECTION    38/270    DATE  08/15
HIGHEST GUST SPEED/DIRECTION    54/280    DATE  08/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.15
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              2
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     49

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      2
HAZE                      4

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

LOOKING AHEAD TO SEPTEMBER 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 82 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 47 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 68
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 37. THE AVERAGE MONTHLY
PRECIPITATION IS 0.95 INCHES. THE AVERAGE SNOWFALL IS 1.5 INCHES.

$$