Climatological Report (Monthly)
Issued by NWS
Issued by NWS
598
CXUS55 KRIW 011736
CLMCPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1122 AM MDT TUE OCT 01 2024
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR CASPER FOR THE MONTH OF
SEPTEMBER 2024...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2024 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
...SEPTEMBER WAS DRIER AND WARMER THAN NORMAL FOR CASPER...
THE AVERAGE TEMPERATURE FOR CASPER IN SEPTEMBER WAS 63.3 DEGREES
WHICH WAS 4.4 DEGREES ABOVE NORMAL. IT WAS THE 5TH WARMEST SEPTEMBER
ON RECORD. THE WARMEST READING FOR THE MONTH WAS 94 DEGREES ON THE
2ND. THE HIGH ON THE 29TH OF 91 DEGREES BROKE THE 2009 RECORD OF 86.
IT ALSO BROKE THE RECORD FOR THE LATEST DAY OF THE YEAR WITH A HIGH
OF 90 DEGREES OR MORE. PREVIOUSLY IT WAS ON SEPTEMBER 28TH IN 2010.
THE COLDEST TEMPERATURE WAS 30 DEGREES ON THE 14TH AND 22ND. NO
OTHER TEMPERATURE RECORDS WERE BROKEN.
PRECIPITATION FOR THE MONTH WAS 0.24 INCHES...WHICH IS 25 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 3RD-4TH WHEN 0.14
INCHES FELL. NO PRECIPITATION RECORDS WERE BROKEN. THE HIGHEST WIND
GUST WAS 60 MPH FROM THE SOUTHWEST ON THE 18TH.
...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 100 09/04/2022
LOW 15 09/28/1945
HIGHEST 94 09/02
LOWEST 30 09/14
09/22
AVG. MAXIMUM 82.4 75.6 6.8
AVG. MINIMUM 44.2 42.2 2.0
MEAN 63.3 58.9 4.4
DAYS MAX >= 90 6
DAYS MAX <= 32 0
DAYS MIN <= 32 3
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.40 1982
MINIMUM 0.07 1956
TOTALS 0.24 0.95 -0.71 0.59
DAILY AVG. 0.01 0.03 -0.02
DAYS >= .01 4
DAYS >= .10 0
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.14 09/03 TO 09/04
STORM TOTAL 0.09
SNOWFALL (INCHES)
TOTALS 0.0 1.5 -1.5
SINCE 7/1 0.0 1.5 -1.5
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 102 214 -112
SINCE 7/1 140 258 -118
COOLING TOTAL 63 30 33
SINCE 1/1 538 442 96
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 10.1
RESULTANT WIND SPEED/DIRECTION 6/230
HIGHEST WIND SPEED/DIRECTION 44/230 DATE 09/18
HIGHEST GUST SPEED/DIRECTION 60/210 DATE 09/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.06
NUMBER OF DAYS FAIR 29
NUMBER OF DAYS PC 1
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 40
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 2
LIGHT RAIN 8 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 1 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.
LOOKING AHEAD TO OCTOBER 2024. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 36 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 53
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 26. THE AVERAGE MONTHLY
PRECIPITATION IS 1.19 INCHES. THE AVERAGE SNOWFALL IS 7 INCHES.
$$