175
CXUS55 KRIW 012019
CLMBPI
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
212 PM MDT WED OCT 01 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BIG PINEY FOR THE MONTH
OF SEPTEMBER 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 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 WARMER AND DRIER THAN NORMAL IN SEPTEMBER
THE AVERAGE TEMPERATURE FOR BIG PINEY IN SEPTEMBER WAS 54.8 DEGREES
WHICH WAS 4 DEGREES ABOVE NORMAL. IT WAS THE 3RD WARMEST SEPTEMBER
SINCE RECORDS BEGAN IN 1998. THE WARMEST READING FOR THE MONTH WAS
83 DEGREES ON THE 3RD AND 4TH. NO TEMPERATURE RECORDS WERE BROKEN
THIS MONTH.
PRECIPITATION FOR THE MONTH WAS 0.51 INCHES...WHICH IS 80 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 15TH WITH 0.13 INCHES.
NO PRECIPITATION RECORDS WERE BROKEN. THE HIGHEST WIND GUST WAS 48
MPH OCCURRING ON THE 7TH FROM THE NORTHWEST.
...THE BIG PINEY WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER
2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1976 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..........................................................
TEMPERATURE (F)
RECORD
HIGH 91 09/05/2020
LOW 9 09/27/1996
09/21/1983
HIGHEST 83 09/03
09/04
LOWEST 29 09/23
AVG. MAXIMUM 72.8 69.7 3.1
AVG. MINIMUM 36.7 31.8 4.9
MEAN 54.8 50.8 4.0
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 8
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.17 1982
MINIMUM T 2018
TOTALS 0.51 0.64 -0.13 0.29
DAILY AVG. 0.02 0.02 -0.00
DAYS >= .01 9
DAYS >= .10 3
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.13 09/15 TO 09/15
STORM TOTAL 0.13
DEGREE DAYS
HEATING TOTAL 299 428 -129
SINCE 7/1 473 705 -232
COOLING TOTAL 0 0 0
SINCE 1/1 41 30 11
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 6.1
RESULTANT WIND SPEED/DIRECTION 1/330
HIGHEST WIND SPEED/DIRECTION 36/320 DATE 09/07
HIGHEST GUST SPEED/DIRECTION 48/320 DATE 09/07
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.23
NUMBER OF DAYS FAIR 23
NUMBER OF DAYS PC 7
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 54
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 8 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 5
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 2 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 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 63 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 27 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 48
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 16 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.62 INCHES.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page