Climatological Report (Monthly) Issued by NWS
000
CXUS55 KRIW 021637
CLMGEY
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1021 AM MDT MON OCT 02 2023
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR GREYBULL FOR THE MONTH OF
SEPTEMBER 2023...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2023 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 WAS WARMER AND WETTER THAN NORMAL IN SEPTEMBER...
THE AVERAGE TEMPERATURE FOR GREYBULL IN SEPTEMBER WAS 64 DEGREES
WHICH WAS 3.1 DEGREES ABOVE NORMAL. IT WAS THE 5TH WARMEST SEPTEMBER
ON RECORD. THE WARMEST READING FOR THE MONTH WAS 94 DEGREES ON THE
1ST. THE COLDEST TEMPERATURE WAS 40 DEGREES ON THE 24TH, 25TH, 29TH
AND 30TH. NO TEMPERATURE RECORDS WERE BROKEN.
PRECIPITATION FOR THE MONTH WAS 1.58 INCHES...WHICH IS 190 PERCENT
OF NORMAL. IT WAS THE 4TH WETTEST SEPTEMBER ON RECORD. THE WETTEST
24-HOUR PERIOD OCCURRED ON THE 4TH WITH 0.86 INCHES. THIS BROKE THE
2016 RECORD OF 0.20. THE 22ND HAD 0.31 INCHES AND BROKE THE 2016
RECORD OF 0.25. THE HIGHEST WIND GUST WAS 50 MPH FROM THE NORTHWEST
ON THE 18TH.
...THE GREYBULL 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 103 09/04/2022
LOW 27 09/18/2003
09/29/1999
HIGHEST 94 09/01
LOWEST 40 09/25
09/29
09/30
AVG. MAXIMUM 79.8 76.7 3.1
AVG. MINIMUM 48.2 45.1 3.1
MEAN 64.0 60.9 3.1
DAYS MAX >= 90 3
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.21 2019
MINIMUM 0.01 2021
TOTALS 1.58 0.83 0.75 1.16
DAILY AVG. 0.05 0.03 0.02
DAYS >= .01 7
DAYS >= .10 3
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.86 09/04 TO 09/04
STORM TOTAL 0.86
DEGREE DAYS
HEATING TOTAL 69 169 -100
SINCE 7/1 74 189 -115
COOLING TOTAL 50 46 4
SINCE 1/1 702 742 -40
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 5.6
RESULTANT WIND SPEED/DIRECTION 1/320
HIGHEST WIND SPEED/DIRECTION 36/300 DATE 09/18
HIGHEST GUST SPEED/DIRECTION 50/300 DATE 09/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.16
NUMBER OF DAYS FAIR 27
NUMBER OF DAYS PC 2
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 53
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 4
LIGHT RAIN 12 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 7 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 OCTOBER 2023...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.
$$