Climatological Report (Monthly)
Issued by NWS Riverton, WY
Issued by NWS Riverton, WY
991
CXUS55 KRIW 021812
CLMRIW
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1014 AM MST THU JAN 02 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON 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
...RIVERTON WAS DRIER AND WARMER THAN NORMAL IN DECEMBER....
THE AVERAGE TEMPERATURE FOR RIVERTON IN DECEMBER WAS 29.5 DEGREES
WHICH WAS 9.9 DEGREES ABOVE NORMAL. IT WAS THE 2ND WARMEST DECEMBER
SINCE RECORDS BEGAN IN 1996. THE WARMEST READING FOR THE MONTH WAS
53 DEGREES ON THE 22ND. THIS BROKE THE 2005 RECORD OF 52. THE 19TH
HIGH OF 46 BROKE 44 FROM 2004. THE 25TH HIGH OF 41 TIED 2005...2021
AND 2022. THE COLDEST READING WAS 5 DEGREES ON THE 31ST.
PRECIPITATION FOR THE MONTH WAS 0.05 INCHES...WHICH IS 19 PERCENT OF
NORMAL. IT WAS THE 6TH DRIEST DECEMBER ON RECORD. THE WETTEST 24-
HOURS WAS THE 30TH-31ST WHEN 0.05 INCHES FELL. NO PRECIPITATION OR
SNOWFALL RECORDS WERE BROKEN THIS MONTH
SNOWFALL FOR THE MONTH WAS 1 INCH. THE SNOWIEST DAY WAS THE 30TH-
31ST WITH 1 INCH. THE HIGHEST WIND GUST WAS 52 MPH FROM THE
NORTHWEST AND OCCURRED ON THE 19TH.
...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 61 12/01/1995
LOW -31 12/22/2022
HIGHEST 53 12/22
LOWEST 5 12/31
AVG. MAXIMUM 41.1 30.8 10.3
AVG. MINIMUM 17.8 8.4 9.4
MEAN 29.5 19.6 9.9
DAYS MAX >= 90 0
DAYS MAX <= 32 2
DAYS MIN <= 32 31
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 0.79 2022
MINIMUM T 2001
TOTALS 0.05 0.26 -0.21 0.01
DAILY AVG. 0.00 0.01 -0.01
DAYS >= .01 2
DAYS >= .10 0
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.05 12/30 TO 12/31
STORM TOTAL 0.03
SNOWFALL (INCHES)
TOTALS 1.0 MM MM
SINCE 7/1 4.8 MM MM
SNOWDEPTH AVG. T
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 1094 1407 -313
SINCE 7/1 2611 3306 -695
COOLING TOTAL 0 0 0
SINCE 1/1 610 499 111
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.6
RESULTANT WIND SPEED/DIRECTION 3/290
HIGHEST WIND SPEED/DIRECTION 37/320 DATE 12/19
37/310 12/29
HIGHEST GUST SPEED/DIRECTION 52/310 DATE 12/19
52/320 12/29
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.15
NUMBER OF DAYS FAIR 27
NUMBER OF DAYS PC 4
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 57
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 0
LIGHT RAIN 0 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 3 SLEET 0
FOG 2 FOG W/VIS <= 1/4 MILE 1
HAZE 3
- 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 30 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 7 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 32 DEGREES
AND THE AVERAGE LOW TEMPERATURE IS 9. THE AVERAGE MONTHLY
PRECIPITATION IS 0.29 INCHES.
$$