Climatological Report (Monthly)
Issued by NWS
Issued by NWS
000
CXUS55 KRIW 031754 CCA
CLMGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1045 AM MST MON NOV 03 2025
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
OCTOBER 2025...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF OCTOBER 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 OCTOBER WAS WARMER AND MUCH WETTER THAN NORMAL....
THE AVERAGE TEMPERATURE FOR GREYBULL IN OCTOBER WAS 47.5 DEGREES
WHICH IS 1 DEGREE ABOVE NORMAL. IT WAS THE 2ND WARMEST OCTOBER SINCE
RECORDS BEGAN IN 1998. THE WARMEST TEMPERATURE FOR THE MONTH WAS 84
DEGREES ON THE 2ND. THE COLDEST TEMPERATURE WAS 21 DEGREES ON THE
31ST. NO TEMPERATURE RECORDS WERE BROKEN THIS MONTH.
PRECIPITATION FOR THE MONTH WAS 1.89 INCHES...WHICH IS 315 PERCENT
OF NORMAL. IT WAS THE 2ND WETTEST OCTOBER ON RECORD. THE WETTEST 24-
HOUR PERIOD OCCURRED ON THE 16TH WITH 0.72 INCHES AND BROKE THE 2011
RECORD OF 0.08. THE 3RD HAD 0.02 INCHES AND BROKE A TRACE FROM 2006.
THE 4TH HAD 0.68 INCHES BREAKING THE 2005 RECORD OF 0.51 AND THE
19TH HAD 0.01 INCHES AND BROKE A TRACE FROM 2006 AND 2016. THE
HIGHEST WIND GUST WAS 53 MPH. IT OCCURRED ON THE 11TH FROM THE
NORTHWEST.
...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 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 87 10/02/2018
LOW -8 10/26/2020
HIGHEST 84 10/02
LOWEST 21 10/31
AVG. MAXIMUM 60.6 59.9 0.7
AVG. MINIMUM 34.5 33.1 1.4
MEAN 47.5 46.5 1.0
DAYS MAX >= 90 0
DAYS MAX <= 32 0
DAYS MIN <= 32 12
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 2.48 2011
MINIMUM T 2017
TOTALS 1.89 0.60 1.29 0.38
DAILY AVG. 0.06 0.02 0.04
DAYS >= .01 8
DAYS >= .10 3
DAYS >= .50 2
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.72 10/16 TO 10/16
STORM TOTAL 0.72
DEGREE DAYS
HEATING TOTAL 532 575 -43
SINCE 7/1 593 762 -169
COOLING TOTAL 0 2 -2
SINCE 1/1 791 744 47
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 5.9
RESULTANT WIND SPEED/DIRECTION 1/310
HIGHEST WIND SPEED/DIRECTION 38/310 DATE 10/11
38/330 10/12
HIGHEST GUST SPEED/DIRECTION 53/320 DATE 10/11
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.30
NUMBER OF DAYS FAIR 21
NUMBER OF DAYS PC 5
NUMBER OF DAYS CLOUDY 5
AVERAGE RH (PERCENT) 64
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 3
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 8 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.
LOOKING AHEAD TO NOVEMBER 2025. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 52 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 26 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 36
DEGREES AND THE AVERAGE LOW TEMPERATURE IS 12 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.19 INCHES.
$$