687
CXUS55 KRIW 092033 CCA
CLMBPI
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
121 PM MST FRI JAN 09 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BIG PINEY FOR THE MONTH
OF DECEMBER 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF DECEMBER 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
..BIG PINEY WAS HAD RECORD MOISTURE AND RECORD WARMTH IN DECEMBER
THE AVERAGE TEMPERATURE FOR BIG PINEY IN DECEMBER WAS 27.5 DEGREES
WHICH WAS 14.9 DEGREES ABOVE NORMAL. IT WAS THE WARMEST DECEMBER
SINCE RECORDS BEGAN IN 1998. THE WARMEST READING FOR THE MONTH WAS
52 DEGREES ON THE 11TH. THE 13TH HIT 45 AND BROKE THE 2014 RECORD OF
42. THE 14TH HIGH OF 47 BROKE THE 1988 RECORD OF 46 DEGREES. THE
15TH HIT 47 AND BROKE 45 DEGREES FROM 1998 THE 16TH HIGH OF 49 BROKE
THE 1998 RECORD OF 47. THE COLDEST READING WAS -4 DEGREES ON THE
28TH.
PRECIPITATION FOR THE MONTH WAS 0.67 INCHES...WHICH IS 291 PERCENT
OF NORMAL. IT WAS THE WETTEST NOVEMBER ON RECORD. THE WETTEST 24-
HOUR PERIOD WAS ON THE 17TH WITH 0.19 INCHES AND BROKE THE 1992
RECORD OF 0.05. THE 26TH HAD 0.04 INCHES AND BROKE A TRACE FROM
2018, 2020 AND 2021. THE HIGHEST WIND GUST WAS 63 MPH OCCURRING ON
THE 17TH FROM THE WEST.
..THE BIG PINEY WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2025
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1976 TO 2026
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 57 12/12/2017
LOW -50 12/23/1983
HIGHEST 52 12/11
LOWEST -4 12/28
AVG. MAXIMUM 39.6 27.6 12.0
AVG. MINIMUM 15.6 -2.2 17.8
MEAN 27.6 12.7 14.9
DAYS MAX >= 90 0
DAYS MAX <= 32 4
DAYS MIN <= 32 31
DAYS MIN <= 0 1
PRECIPITATION (INCHES)
RECORD
MAXIMUM 1.39 1983
MINIMUM T 2019
TOTALS 0.67 0.23 0.44 0.30
DAILY AVG. 0.02 0.01 0.01
DAYS >= .01 12
DAYS >= .10 2
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.19 12/17 TO 12/17
STORM TOTAL 0.19
DEGREE DAYS
HEATING TOTAL 1149 1621 -472
SINCE 7/1 3208 4374 -1166
COOLING TOTAL 0 0 0
SINCE 1/1 41 30 11
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 7.0
RESULTANT WIND SPEED/DIRECTION 2/320
HIGHEST WIND SPEED/DIRECTION 47/290 DATE 12/17
HIGHEST GUST SPEED/DIRECTION 63/280 DATE 12/17
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.34
NUMBER OF DAYS FAIR 16
NUMBER OF DAYS PC 13
NUMBER OF DAYS CLOUDY 2
AVERAGE RH (PERCENT) 71
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 4 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 2 SNOW 2
LIGHT SNOW 15 SLEET 0
FOG 16 FOG W/VIS <= 1/4 MILE 2
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 2026. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 26 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS -4 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 27
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS -2 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.23 INCHES.
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