746
CXUS55 KRIW 011632
CLMP60

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1032 AM MDT MON JUN 01 2026

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

...THE LAKE YELLOWSTONE WY CLIMATE SUMMARY FOR THE MONTH OF MAY 2026...

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

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             78   05/28/2003
 LOW               0   05/07/2010
HIGHEST           72   05/13
                       05/28
LOWEST            16   05/06
                       05/19
AVG. MAXIMUM    55.6               50.6     5.0
AVG. MINIMUM    26.8               26.3     0.5
MEAN            41.2               38.4     2.8
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32    27
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        4.53   2022
 MINIMUM        0.42   2019
TOTALS          0.97               2.35   -1.38     2.45
DAILY AVG.      0.03               0.08   -0.05
DAYS >= .01       11
DAYS >= .10        3
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.41   05/21 TO 05/21
 STORM TOTAL    0.41

DEGREE DAYS
HEATING TOTAL    708                823    -115
 SINCE 7/1      9750              11473   -1723
COOLING TOTAL      0                  0       0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              3.1
RESULTANT WIND SPEED/DIRECTION   0/090
HIGHEST WIND SPEED/DIRECTION    23/270    DATE  05/11
HIGHEST GUST SPEED/DIRECTION    39/270    DATE  05/11
                                39/280          05/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           31
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                5     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.

$$