Climatological Report (Monthly)
Issued by NWS St Louis, MO
Issued by NWS St Louis, MO
434
CXUS53 KLSX 011335
CLMSTL
CLIMATE REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
835 AM CDT WED OCT 01 2025
...................................
...THE ST. LOUIS CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1874 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
RECORD
HIGH 104 09/01/2011
09/01/1984
09/04/1954
LOW 32 09/28/1942
HIGHEST 98 09/14 96
LOWEST 50 09/07 48
AVG. MAXIMUM 84.9 81.1 3.8 83.7
AVG. MINIMUM 62.3 60.9 1.4 63.4
MEAN 73.6 71.0 2.6 73.5
DAYS MAX >= 90 9 5.0 4.0 8
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.0 0.0 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 10.04 1945
MINIMUM T 1979
TOTALS 0.74 2.96 -2.22 5.75
DAILY AVG. 0.02 0.10 -0.08 0.19
DAYS >= .01 6 7.3 -1.3 5
DAYS >= .10 2 4.5 -2.5 4
DAYS >= .50 0 1.9 -1.9 3
DAYS >= 1.00 0 1.0 -1.0 2
GREATEST
24 HR. TOTAL 0.41 09/23 TO 09/23
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
24 HR TOTAL MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 MM
DAYS >= 1.0 0 0
GREATEST
SNOW DEPTH 0
24 HR TOTAL MM
DEGREE DAYS
HEATING TOTAL 4 32 -28 3
SINCE 7/1 4 31 -27 MM
COOLING TOTAL 269 212 57 268
SINCE 1/1 1790 1662 128 MM
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WIND (MPH)
HIGHEST WIND SPEED/DIRECTION 31/280 DATE 09/18
HIGHEST GUST SPEED/DIRECTION 42/270 DATE 09/18
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
NUMBER OF DAYS FAIR 11
NUMBER OF DAYS PC 15
NUMBER OF DAYS CLOUDY 4
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 3 RAIN 2
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 0
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
...MONTHLY...
TIED 13TH DRIEST SEPTEMBER ON RECORD (0.74 INCHES).
...DAILY...
NO RECORDS OF NOTE.
$$