Climatological Report (Daily)
Issued by NWS Riverton, WY

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021
CDUS45 KRIW 120045
CLIRIW

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT FRI SEP 11 2026

...................................

...THE RIVERTON WY CLIMATE SUMMARY FOR SEPTEMBER 11 2026...
VALID TODAY AS OF 0600 PM LOCAL TIME.

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1995 TO 2026


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 TODAY
  MAXIMUM         86   3:15 PM  87    2004  77      9       86
                                      2017
                                      2018
  MINIMUM         63   6:25 AM  30    2014  46     17       60
  AVERAGE         75                        61     14       73

PRECIPITATION (IN)
  TODAY            0.00          1.11 2019   0.02  -0.02     0.00
  MONTH TO DATE    T                         0.20  -0.20      T
  SINCE SEP 1      T                         0.20  -0.20      T
  SINCE JAN 1      2.97                      6.56  -3.59     6.25

SNOWFALL (IN)
  TODAY           MM                                         0.0
  MONTH TO DATE    0.0                                       0.0
  SINCE SEP 1      0.0                                       0.0
  SINCE JUL 1      0.0                                       0.0
  SNOW DEPTH      MM

DEGREE DAYS
 HEATING
  TODAY            0                         5     -5        0
  MONTH TO DATE    3                        41    -38       12
  SINCE SEP 1      3                        41    -38       12
  SINCE JUL 1      5                        77    -72       15

 COOLING
  TODAY           10                         1      9        8
  MONTH TO DATE   47                        21     26       36
  SINCE SEP 1     47                        21     26       36
  SINCE JAN 1    760                       489    271      610
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    24   HIGHEST WIND DIRECTION     W (260)
  HIGHEST GUST SPEED    34   HIGHEST GUST DIRECTION    SW (240)
  AVERAGE WIND SPEED    11.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.2


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
  NO SIGNIFICANT WEATHER WAS OBSERVED.


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    38
 LOWEST     12
 AVERAGE    25

..........................................................


THE RIVERTON WY CLIMATE NORMALS FOR TOMORROW
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   76        88      2017
                                             2018
 MINIMUM TEMPERATURE (F)   46        28      2014


SUNRISE AND SUNSET
SEPTEMBER 11 2026.....SUNRISE   6:49 AM MDT   SUNSET   7:31 PM MDT
SEPTEMBER 12 2026.....SUNRISE   6:50 AM MDT   SUNSET   7:29 PM MDT


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




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