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000
CXUS55 KRIW 021639
CLMLND

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

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER 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

...LANDER WAS WARMER AND DRIER THAN NORMAL IN SEPTEMBER....

THE AVERAGE TEMPERATURE FOR LANDER IN SEPTEMBER WAS 62.5 DEGREES
WHICH WAS 2.9 DEGREES ABOVE NORMAL. THE WARMEST READING FOR THE
MONTH WAS 88 DEGREES ON THE 1ST. THE COLDEST TEMPERATURE WAS 36
DEGREES ON THE 23RD. NO TEMPERATURE RECORDS WERE BROKEN.

PRECIPITATION FOR THE MONTH WAS 0.56 INCHES...WHICH IS 57 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 4TH-5TH WHEN 0.44 INCHES
OF PRECIPITATION FELL. THE 4TH HAD 0.42 INCHES AND BROKE THE 2008
RECORD OF 0.18. THE HIGHEST WIND GUST OCCURRED ON THE 13TH WITH 62
MPH FROM THE SOUTHWEST.

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

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             99   09/04/2022
 LOW               7   09/22/1895
HIGHEST           88   09/01
LOWEST            36   09/23
AVG. MAXIMUM    77.4               74.6     2.8
AVG. MINIMUM    47.6               44.6     3.0
MEAN            62.5               59.6     2.9
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.64   1923
 MINIMUM           T   2010
TOTALS          0.56               0.98   -0.42     1.50
DAILY AVG.      0.02               0.03   -0.01
DAYS >= .01        7
DAYS >= .10        1
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.44   09/04 TO 09/05
 STORM TOTAL    0.42

SNOWFALL (INCHES)
TOTALS           0.0                1.5    -1.5
SINCE 7/1        0.0                1.5    -1.5
SNOWDEPTH AVG.     0
DAYS >= 1.0        0

DEGREE DAYS
HEATING TOTAL     96                195     -99
 SINCE 7/1       142                233     -91
COOLING TOTAL     29                 32      -3
 SINCE 1/1       361                484    -123
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.4
RESULTANT WIND SPEED/DIRECTION   2/240
HIGHEST WIND SPEED/DIRECTION    40/200    DATE  09/13
HIGHEST GUST SPEED/DIRECTION    62/210    DATE  09/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.18
NUMBER OF DAYS FAIR           24
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     45

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
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      0
HAZE                      0

-  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 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 38 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 52
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 26. THE AVERAGE MONTHLY
PRECIPITATION IS 1.40 INCHES. THE AVERAGE SNOWFALL IS 10.5 INCHES.

$$