Climatological Report (Daily)
Issued by NWS

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791
CDUS45 KRIW 150727
CLIP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
127 AM MDT FRI AUG 15 2025

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

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 14 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2025


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         78   3:50 PM  84    2003  71      7       59
  MINIMUM         39   5:43 AM  29    2005  38      1       35
  AVERAGE         59                        54      5       47

PRECIPITATION (IN)
  YESTERDAY        0.00          0.33 2015   0.05  -0.05     0.20
  MONTH TO DATE    0.05                      0.60  -0.55     0.82
  SINCE JUN 1      1.44                      4.49  -3.05     2.56
  SINCE JAN 1     10.67                     14.52  -3.85    14.76

DEGREE DAYS
 HEATING
  YESTERDAY        6                        10     -4       18
  MONTH TO DATE  133                       130      3      123
  SINCE JUN 1    806                       964   -158      814
  SINCE JUL 1    364                       426    -62      385

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE JUN 1      1                         0      1        0
  SINCE JAN 1      1                         0      1        0
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION    NW (310)
  HIGHEST GUST SPEED    32   HIGHEST GUST DIRECTION    NW (310)
  AVERAGE WIND SPEED     2.9


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 0.0


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


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    86           5:00 AM
 LOWEST     18           2:00 PM
 AVERAGE    52

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


THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   71        81      2003
                                             2023
 MINIMUM TEMPERATURE (F)   37        29      2009


SUNRISE AND SUNSET
AUGUST 15 2025........SUNRISE   6:25 AM MDT   SUNSET   8:26 PM MDT
AUGUST 16 2025........SUNRISE   6:26 AM MDT   SUNSET   8:25 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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