Climatological Report (Monthly)
Issued by NWS
Issued by NWS
153
CXUS55 KRIW 021804
CLMCPR
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1014 AM MST THU JAN 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR CASPER FOR THE MONTH OF
DECEMBER 2024
...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 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
...DECEMBER WAS DRIER AND WARMER THAN NORMAL FOR CASPER...
THE AVERAGE TEMPERATURE FOR CASPER IN DECEMBER WAS 33.4 DEGREES
WHICH WAS 8.6 DEGREES ABOVE NORMAL. IT WAS THE 3RD WARMEST DECEMBER
ON RECORD. THE WARMEST READING FOR THE MONTH WAS 57 DEGREES ON THE
21ST. THIS BROKE THE PREVIOUS RECORD OF 53 SET IN 1969 AND 2023. THE
HIGH ON THE 20TH OF 56 DEGREES TIED WITH 1941. THE HIGH ON THE 29TH
OF 51 DEGREES TIED THE 1965 RECORD. THE COLDEST TEMPERATURE WAS 8
DEGREES ON THE 31ST.
PRECIPITATION FOR THE MONTH WAS 0.16 INCHES...WHICH IS 26 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 30TH WHEN 0.12 INCHES
FELL. THERE WERE NO PRECIPITATION OR SNOWFALL RECORDS BROKEN THIS
MONTH.
SNOWFALL FOR THE MONTH WAS 1.5 INCHES...WHICH IS 14 PERCENT OF
NORMAL. THE SNOWIEST 24-HOUR PERIOD WAS THE 30TH WITH 1.5 INCHES.
THE HIGHEST WIND GUST WAS 61 MPH FROM THE SOUTHWEST ON THE 8TH.
...THE CASPER WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2024...
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 57 12/21
LOWEST 8 12/31
AVG. MAXIMUM 45.3 34.7 10.6
AVG. MINIMUM 21.6 14.8 6.8
MEAN 33.4 24.8 8.6
DAYS MAX >= 90 0
DAYS MAX <= 32 2
DAYS MIN <= 32 30
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.71 1982
MINIMUM 0.03 1952
TOTALS 0.16 0.61 -0.45 0.06
DAILY AVG. 0.01 0.02 -0.01
DAYS >= .01 4
DAYS >= .10 1
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.12 12/30 TO 12/30
STORM TOTAL 0.12
SNOWFALL (INCHES)
TOTALS 1.5 11.0 -9.5
SINCE 7/1 1.5 28.4 -26.9
SNOWDEPTH AVG. 0
DAYS >= 1.0 1
DEGREE DAYS
HEATING TOTAL 970 1248 -278
SINCE 7/1 2470 3048 -578
COOLING TOTAL 0 0 0
SINCE 1/1 538 443 95
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 14.8
RESULTANT WIND SPEED/DIRECTION 13/230
HIGHEST WIND SPEED/DIRECTION 44/210 DATE 12/08
HIGHEST GUST SPEED/DIRECTION 61/210 DATE 12/08
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.26
NUMBER OF DAYS FAIR 20
NUMBER OF DAYS PC 9
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 60
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 5 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 7 SLEET 0
FOG 4 FOG W/VIS <= 1/4 MILE 0
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO JANUARY 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 34 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 14 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 36
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 15. THE AVERAGE MONTHLY
PRECIPITATION IS 0.49 INCHES. THE AVERAGE SNOWFALL IS 9 INCHES.
$$