481
CXUS55 KRIW 021623
CLMGEY

CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1013 AM MDT FRI MAY 02 2025

...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
APRIL 2025...

...OFFICIAL CLIMATE DATA FOR THE MONTH OF APRIL 2025 WILL BE
AVAILABLE IN APPROXIMATELY 60 DAYS FROM THE NATIONAL CENTERS FOR
ENVIRONMENTAL INFORMATION (HTTP://WWW.NCDC.NOAA.GOV/CDO-
WEB/DATASETS). UNOFFICIAL ASOS DAILY SUMMARIES ARE AVAILABLE ON THE
INTERNET AT HTTP://WWW.WEATHER.GOV/CLIMATE/INDEX.PHP?WFO=RIW

...GREYBULL IN APRIL WAS COOLER AND DRIER THAN NORMAL....

THE AVERAGE TEMPERATURE FOR GREYBULL IN APRIL WAS 46.4 DEGREES WHICH
IS 0.3 DEGREES BELOW NORMAL. THE WARMEST TEMPERATURE FOR THE MONTH
WAS 82 DEGREES ON THE 11TH. THE COLDEST TEMPERATURE WAS 17 DEGREES
ON THE 5TH. THIS BROKE THE 1999 RECORD OF 18 DEGREES. THE 19TH LOW
OF 27 TIED THE PREVIOUS RECORD SET IN 2021 AND 2002.

PRECIPITATION FOR THE MONTH WAS 0.45 INCHES...WHICH IS 85 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD OCCURRED ON THE 17TH WITH 0.22
INCHES. THIS BROKE THE 2018 RECORD OF 0.18. THE HIGHEST WIND GUST
WAS 52 MPH FROM THE NORTHWEST ON THE 13TH.

...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF APRIL 2025...

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

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             88   04/23/2012
                       04/29/2007
 LOW               5   04/21/2008
HIGHEST           82   04/11
LOWEST            17   04/05
AVG. MAXIMUM    60.3               60.0     0.3
AVG. MINIMUM    32.6               33.4    -0.8
MEAN            46.4               46.7    -0.3
DAYS MAX >= 90     0
DAYS MAX <= 32     0
DAYS MIN <= 32    15
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        1.55   2022
 MINIMUM        0.04   2023
TOTALS          0.45               0.53   -0.08     0.83
DAILY AVG.      0.02               0.02    0.00
DAYS >= .01        5
DAYS >= .10        2
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.22   04/17 TO 04/17
 STORM TOTAL    0.22

DEGREE DAYS
HEATING TOTAL    548                550      -2
 SINCE 7/1      6765               7213    -448
COOLING TOTAL      0                  1      -1
 SINCE 1/1         0                  1      -1
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.9
RESULTANT WIND SPEED/DIRECTION   5/330
HIGHEST WIND SPEED/DIRECTION    38/340    DATE  04/13
HIGHEST GUST SPEED/DIRECTION    52/340    DATE  04/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           18
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     56

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW                2     SLEET                      0
FOG                       2     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

LOOKING AHEAD TO MAY 2025. THE AVERAGE HIGH TEMPERATURE ON THE FIRST
OF THE MONTH IS 65 DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 38
DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 76
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 49 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 1.33 INCHES.

$$