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000
CXUS55 KRIW 021641
CLMRIW

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1021 AM MDT MON OCT 02 2023

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR RIVERTON FOR THE MONTH OF
SEPTEMBER 2023...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2023 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 WARMER AND DRIER THAN NORMAL IN SEPTEMBER....

THE AVERAGE TEMPERATURE FOR RIVERTON IN SEPTEMBER WAS 62.4 DEGREES
WHICH WAS 3.2 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 88 DEGREES ON THE 1ST. THE HIGH ON THE 30TH OF 83 BROKE
THE 2005 RECORD OF 81. THE COLDEST READING WAS 39 DEGREES ON THE
23RD.

PRECIPITATION FOR THE MONTH WAS 0.67 INCHES...WHICH IS 87 PERCENT OF
NORMAL. THE WETTEST 24-HOURS WAS THE 13TH-14TH WHEN 0.52 INCHES
FELL. THE 4TH HAD 0.14 INCHES WHICH BROKE 0.10 FROM 2008. THE 13TH
HAD 0.26 INCHES WHICH BROKE THE 1998 RECORD OF 0.07. THE HIGHEST
WIND GUST OCCURRED ON THE 3RD WITH 47 MPH FROM THE NORTHWEST.

...THE RIVERTON WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH            100   09/04/2022
 LOW              21   09/27/1996
                       09/27/1996
HIGHEST           88   09/01
LOWEST            39   09/23
AVG. MAXIMUM    76.9               74.0     2.9
AVG. MINIMUM    47.8               44.4     3.4
MEAN            62.3               59.2     3.1
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.01   2013
 MINIMUM        0.01   2010
TOTALS          0.67               0.77   -0.10     1.14
DAILY AVG.      0.02               0.03   -0.01
DAYS >= .01        4
DAYS >= .10        3
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.52   09/13 TO 09/14
 STORM TOTAL    0.26

SNOWFALL (INCHES)
TOTALS           0.0                 MM      MM
SINCE 7/1        0.0                 MM      MM
SNOWDEPTH AVG.     0
DAYS >= 1.0        0

DEGREE DAYS
HEATING TOTAL    103                205    -102
 SINCE 7/1       136                241    -105
COOLING TOTAL     30                 31      -1
 SINCE 1/1       401                499     -98
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
RESULTANT WIND SPEED/DIRECTION   3/290
HIGHEST WIND SPEED/DIRECTION    33/300    DATE  09/23
HIGHEST GUST SPEED/DIRECTION    47/290    DATE  09/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.16
NUMBER OF DAYS FAIR           25
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     48

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       2
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      1
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 2023...THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 66 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 38 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 51
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 25. THE AVERAGE MONTHLY
PRECIPITATION IS 0.83 INCHES.

$$