494
CXUS55 KRIW 011711
CLMBPI

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1105 AM MDT THU OCT 01 2026

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BIG PINEY FOR THE MONTH
OF SEPTEMBER 2026...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2026 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 WETTER AND WARMER THAN NORMAL IN SEPTEMBER...

THE AVERAGE TEMPERATURE FOR BIG PINEY IN SEPTEMBER WAS 54.2 DEGREES
WHICH WAS 3.4 DEGREES ABOVE NORMAL. IT WAS THE SEVENTH WARMEST
SEPTEMBER ON RECORD. THE WARMEST READING FOR THE MONTH WAS 82
DEGREES ON THE 13TH. THE COLDEST READING WAS 25 DEGREES ON THE 18TH.
NO TEMPERATURE RECORDS WERE BROKEN THIS MONTH

PRECIPITATION FOR THE MONTH WAS 1.23 INCHES...WHICH IS 192 PERCENT
OF NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 18TH WITH 0.40
INCHES AND BROKE THE 1996 RECORD OF 0.16. THE HIGHEST WIND GUST WAS
51 MPH OCCURRING ON THE 13TH FROM THE WEST.

...THE BIG PINEY WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER
2026...

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             91   09/05/2020
 LOW               9   09/27/1996
                       09/21/1983
HIGHEST           82   09/13
LOWEST            25   09/15
AVG. MAXIMUM    71.5               69.7     1.8
AVG. MINIMUM    36.8               31.8     5.0
MEAN            54.2               50.8     3.4
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32     5
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.17   1982
 MINIMUM           T   2018
TOTALS          1.23               0.64    0.59     0.51
DAILY AVG.      0.04               0.02    0.02
DAYS >= .01        7
DAYS >= .10        5
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.40   09/18 TO 09/18
 STORM TOTAL    0.40

DEGREE DAYS
HEATING TOTAL    318                428    -110
 SINCE 7/1       435                705    -270
COOLING TOTAL      0                  0       0
 SINCE 1/1       163                 30     133
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.1
RESULTANT WIND SPEED/DIRECTION   2/300
HIGHEST WIND SPEED/DIRECTION    36/260    DATE  09/13
HIGHEST GUST SPEED/DIRECTION    51/260    DATE  09/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.21
NUMBER OF DAYS FAIR           23
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     55

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       4
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

LOOKING AHEAD TO OCTOBER 2026. 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.

$$