000
CXUS55 KRIW 021621
CLMP60

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

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

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             83   09/07/2022
 LOW              13   09/24/2000
HIGHEST           71   09/01
LOWEST            26   09/29
AVG. MAXIMUM    61.3               60.5     0.8
AVG. MINIMUM    32.9               30.3     2.6
MEAN            47.1               45.4     1.7
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32    14
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.09   2013
 MINIMUM        0.21   2018
TOTALS          3.62               1.57    2.05     1.62
DAILY AVG.      0.12               0.05    0.07
DAYS >= .01       10
DAYS >= .10        7
DAYS >= .50        3
DAYS >= 1.00       1
GREATEST
 24 HR. TOTAL   1.57   09/20 TO 09/21
 STORM TOTAL    1.20

DEGREE DAYS
HEATING TOTAL    496                588     -92
 SINCE 7/1      1029               1230    -201
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              1.9
RESULTANT WIND SPEED/DIRECTION   0/070
HIGHEST WIND SPEED/DIRECTION    17/280    DATE  09/08
HIGHEST GUST SPEED/DIRECTION    32/200    DATE  09/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           28
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       5
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       0     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.

$$