Climatological Report (Monthly)
Issued by NWS
Issued by NWS
366
CXUS55 KRIW 011738
CLMGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1122 AM MDT TUE OCT 01 2024
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
SEPTEMBER 2024...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2024 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 SEPTEMBER WAS DRIER THAN NORMAL WITH RECORD WARMTH....
THE AVERAGE TEMPERATURE FOR GREYBULL IN SEPTEMBER WAS 65.4 DEGREES
WHICH WAS 4.5 DEGREES ABOVE NORMAL. THIS TIED WITH 2015 AND 2022 FOR
THE WARMEST SEPTEMBER SINCE RECORDS BEGAN IN 1998. THE WARMEST
READING FOR THE MONTH WAS 99 DEGREES ON THE 2ND. THIS BROKE THE 2019
RECORD OF 98. OTHER DAILY RECORD HIGHS ARE LISTED BELOW. THE COLDEST
TEMPERATURE WAS 35 DEGREES ON THE 22ND.
DATE NEW OLD YEAR
8TH 93 (TIE) 93 2005
25TH 94 93 2014
29TH 97 87 2009
PRECIPITATION FOR THE MONTH WAS 0.38 INCHES...WHICH IS 46 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD OCCURRED ON THE 12TH WITH 0.19
INCHES. THIS BROKE THE 2016 RECORD OF 0.12. THE 18TH HAD 0.16 INCHES
AND BROKE THE 2017 RECORD OF 0.09. THE HIGHEST WIND GUST WAS 58 MPH
FROM THE NORTHWEST ON THE 3RD.
...THE GREYBULL WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 103 09/04/2022
LOW 27 09/18/2003
09/29/1999
HIGHEST 99 09/02
LOWEST 35 09/22
AVG. MAXIMUM 84.0 76.7 7.3
AVG. MINIMUM 46.7 45.1 1.6
MEAN 65.4 60.9 4.5
DAYS MAX >= 90 11
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.21 2019
MINIMUM 0.01 2021
TOTALS 0.38 0.83 -0.45 1.58
DAILY AVG. 0.01 0.03 -0.02
DAYS >= .01 3
DAYS >= .10 2
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.19 09/12 TO 09/12
STORM TOTAL 0.19
DEGREE DAYS
HEATING TOTAL 70 169 -99
SINCE 7/1 83 189 -106
COOLING TOTAL 89 46 43
SINCE 1/1 830 742 88
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 5.7
RESULTANT WIND SPEED/DIRECTION 0/130
HIGHEST WIND SPEED/DIRECTION 43/340 DATE 09/03
43/330 09/30
HIGHEST GUST SPEED/DIRECTION 58/330 DATE 09/03
58/320 09/30
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.08
NUMBER OF DAYS FAIR 28
NUMBER OF DAYS PC 1
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 45
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 3 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 2 FOG W/VIS <= 1/4 MILE 0
HAZE 3
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO OCTOBER 2024. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 68 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 39 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 52
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 26 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 0.60 INCHES.
$$