Climatological Report (Monthly)
Issued by NWS
Issued by NWS
506
CXUS55 KRIW 011742
CLMLND
CLIMATE REPORT
NATIONAL WEATHER SERVICE RIVERTON WY
1122 AM MDT TUE OCT 01 2024
...PRELIMINARY MONTHLY CLIMATE SUMMARY FOR LANDER 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
...LANDER WAS DRIER AND WARMER THAN NORMAL IN SEPTEMBER....
THE AVERAGE TEMPERATURE FOR LANDER IN SEPTEMBER WAS 64.7 DEGREES
WHICH WAS 5.1 DEGREES ABOVE NORMAL. IT WAS THE 3RD WARMEST SEPTEMBER
ON RECORD. THE WARMEST READING FOR THE MONTH WAS 91 DEGREES ON THE
1ST AND 2ND. THE HIGH ON THE 25TH WAS 90 DEGREES AND BROKE THE 2015
RECORD OF 89. THE HIGH ON THE 29TH OF 90 DEGREES BROKE THE RECORD
FOR THE LATEST DAY OF THE YEAR WITH A HIGH OF 90 DEGREES OR MORE.
PREVIOUSLY IT WAS ON SEPTEMBER 26TH IN 2015.THE COLDEST TEMPERATURE
WAS 36 DEGREES ON THE 22ND.
PRECIPITATION FOR THE MONTH WAS 0.40 INCHES...WHICH IS 41 PERCENT OF
NORMAL. THE WETTEST 24-HOUR PERIOD WAS THE 3RD-4TH WHEN 0.31 INCHES
OF PRECIPITATION FELL. NO PRECIPITATION RECORDS WERE BROKEN. THE
HIGHEST WIND GUST WAS 71 MPH AND OCCURRED ON THE 15TH FROM THE
SOUTH.
...THE LANDER WY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1891 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 99 09/04/2022
LOW 7 09/22/1895
HIGHEST 91 09/01
09/02
LOWEST 36 09/22
AVG. MAXIMUM 80.8 74.6 6.2
AVG. MINIMUM 48.6 44.6 4.0
MEAN 64.7 59.6 5.1
DAYS MAX >= 90 4
DAYS MAX <= 32 0
DAYS MIN <= 32 0
DAYS MIN <= 0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 5.64 1923
MINIMUM T 2010
TOTALS 0.40 0.98 -0.58 0.56
DAILY AVG. 0.01 0.03 -0.02
DAYS >= .01 5
DAYS >= .10 1
DAYS >= .50 0
DAYS >= 1.00 0
GREATEST
24 HR. TOTAL 0.31 09/03 TO 09/04
STORM TOTAL 0.26
SNOWFALL (INCHES)
TOTALS 0.0 1.5 -1.5
SINCE 7/1 0.0 1.5 -1.5
SNOWDEPTH AVG. 0
DAYS >= 1.0 0
DEGREE DAYS
HEATING TOTAL 84 195 -111
SINCE 7/1 102 233 -131
COOLING TOTAL 83 32 51
SINCE 1/1 644 484 160
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 7.3
RESULTANT WIND SPEED/DIRECTION 3/240
HIGHEST WIND SPEED/DIRECTION 48/190 DATE 09/17
HIGHEST GUST SPEED/DIRECTION 71/190 DATE 09/15
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.05
NUMBER OF DAYS FAIR 29
NUMBER OF DAYS PC 1
NUMBER OF DAYS CLOUDY 0
AVERAGE RH (PERCENT) 35
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 4
LIGHT RAIN 6 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 1 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 67 DEGREES...AND THE AVERAGE LOW TEMPERATURE
IS 38 DEGREES. THE AVERAGE HIGH BY THE END OF THE MONTH IS 52
DEGREES...AND THE AVERAGE LOW TEMPERATURE IS 26. THE AVERAGE MONTHLY
PRECIPITATION IS 1.40 INCHES. THE AVERAGE SNOWFALL IS 10.5 INCHES.
$$