590
CXUS55 KRIW 011712
CLMBYG
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1105 AM MDT THU OCT 01 2026
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR BUFFALO FOR THE MONTH OF
SEPTEMBER 2026...
...OFFICIAL CLIMATE DATA FOR THE MONTH OF SEPTEMBER 2026 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
..BUFFALO WAS WARMER AND DRIER IN SEPTEMBER
THE AVERAGE TEMPERATURE FOR BUFFALO IN SEPTEMBER WAS 63.3 DEGREES
WHICH WAS 3.5 DEGREES ABOVE NORMAL. IT WAS THE SEVENTH WARMEST
SEPTEMBER ON RECORD. THE WARMEST READING FOR THE MONTH WAS 93
DEGREES ON THE 4TH. THE COLDEST READING OF THE MONTH WAS 41 DEGREES
ON THE 15TH. NO TEMPERATURE RECORDS WERE BROKEN.
PRECIPITATION FOR THE MONTH WAS 1.11 INCHES...WHICH IS 95 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS ON THE 18TH-19TH WITH 0.66
INCHES. THE 18TH HAD 0.54 INCHES AND BROKE 0.32 FROM 2002. THE
HIGHEST WIND GUST WAS 58 MPH OCCURRING ON THE 18TH FROM THE SOUTH.
..THE BUFFALO WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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 100 09/04/2022
LOW 19 09/12/2014
HIGHEST 93 09/04
LOWEST 41 09/15
AVG. MAXIMUM 76.1 72.3 3.8
AVG. MINIMUM 50.4 47.3 3.1
MEAN 63.3 59.8 3.5
DAYS MAX >= 90 1
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 3.80 2023
MINIMUM 0.09 2021
TOTALS 1.11 1.17 -0.06 0.67
DAILY AVG. 0.04 0.04 0.00
DAYS >= .01 5
DAYS >= .10 3
DAYS >= .50 1
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.66 09/18 TO 09/19
STORM TOTAL 0.54
DEGREE DAYS
HEATING TOTAL 98 213 -115
SINCE 7/1 116 271 -155
COOLING TOTAL 54 57 -3
SINCE 1/1 676 525 151
..........................................................
WIND (MPH)
AVERAGE WIND SPEED 9.6
RESULTANT WIND SPEED/DIRECTION 2/240
HIGHEST WIND SPEED/DIRECTION 44/180 DATE 09/18
HIGHEST GUST SPEED/DIRECTION 58/180 DATE 09/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.17
NUMBER OF DAYS FAIR 27
NUMBER OF DAYS PC 2
NUMBER OF DAYS CLOUDY 1
AVERAGE RH (PERCENT) 49
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 3
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 4 FOG W/VIS <= 1/4 MILE 1
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
LOOKING AHEAD TO OCTOBER 2026. THE AVERAGE HIGH TEMPERATURE ON THE
FIRST OF THE MONTH IS 64 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 41 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 52
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 30 DEGREES. THE AVERAGE
MONTHLY PRECIPITATION IS 1.01 INCHES.
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