Climatological Report (Daily)
Issued by NWS

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320
CDUS45 KRIW 300730
CLIP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
130 AM MDT SUN AUG 30 2026

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

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR AUGUST 29 2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2026


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         61   1:20 PM  78    2005  68     -7       63
  MINIMUM         43  11:18 PM  26    2024  34      9       35
  AVERAGE         52                        51      1       49

PRECIPITATION (IN)
  YESTERDAY        0.22R         0.13 2003   0.05   0.17     0.04
  MONTH TO DATE    2.54                      1.24   1.30     1.09
  SINCE JUN 1      5.50                      5.13   0.37     2.48
  SINCE JAN 1     13.74                     15.16  -1.42    11.71

DEGREE DAYS
 HEATING
  YESTERDAY       13                        14     -1       16
  MONTH TO DATE  218                       316    -98      259
  SINCE JUN 1    848                      1150   -302      932
  SINCE JUL 1    334                       612   -278      490

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE JUN 1      2                         0      2        1
  SINCE JAN 1      2                         0      2        1
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    15   HIGHEST WIND DIRECTION     W (270)
  HIGHEST GUST SPEED    25   HIGHEST GUST DIRECTION     W (280)
  AVERAGE WIND SPEED     1.5


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    97           6:00 AM
 LOWEST     62           1:00 PM
 AVERAGE    80

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


THE LAKE YELLOWSTONE WY CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   67        78      2001
                                             2008
                                             2016
 MINIMUM TEMPERATURE (F)   34        27      2005


SUNRISE AND SUNSET
AUGUST 30 2026........SUNRISE   6:42 AM MDT   SUNSET   8:01 PM MDT
AUGUST 31 2026........SUNRISE   6:43 AM MDT   SUNSET   8:00 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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