Climatological Report (Monthly)
Issued by NWS St Louis, MO
Issued by NWS St Louis, MO
028
CXUS53 KLSX 011539 CCA
CLMSTL
CLIMATE REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1008 AM CDT THU OCT 01 2026
...................................
...THE ST. LOUIS CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1874 TO 2026
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 101 09/05 98
LOWEST 55 09/29 50
AVG. MAXIMUM 87.5 81.1 6.4 84.9
AVG. MINIMUM 69.3 60.9 8.4 62.3
MEAN 78.4 71.0 7.4 73.6
DAYS MAX >= 90 16 5.0 11.0 9
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
1940
TOTALS 1.38 2.96 -1.58 0.74
DAILY AVG. 0.05 0.10 -0.05 0.02
DAYS >= .01 6 7.3 -1.3 6
DAYS >= .10 4 4.5 -0.5 2
DAYS >= .50 1 1.9 -0.9 0
DAYS >= 1.00 0 1.0 -1.0 0
GREATEST
24 HR. TOTAL 1.06 09/20 TO 09/21
SNOWFALL (INCHES)
RECORDS
TOTAL 0.0
24 HR TOTAL 0.0
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 0.0
DAYS >= 1.0 0 0
GREATEST
SNOW DEPTH 0
24 HR TOTAL 0.0
DEGREE DAYS
HEATING TOTAL 3 32 -29
SINCE 7/1 3 33 -30
COOLING TOTAL 413 212 201
SINCE 1/1 1981 1662 319
..............................................................
WIND (MPH)
HIGHEST WIND SPEED/DIRECTION 24/150 DATE 09/16
HIGHEST GUST SPEED/DIRECTION 30/160 DATE 09/16
SKY COVER
NUMBER OF DAYS FAIR 6
NUMBER OF DAYS PC 13
NUMBER OF DAYS CLOUDY 11
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 4 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 3
LIGHT RAIN 8 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 6 FOG W/VIS <= 1/4 MILE 0
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
...MONTHLY...
RECORD WARMEST SEPTEMBER ON RECORD (78.4 DEGREES. PREVIOUS 77.8
DEGREES IN 2019).
TIED 2ND MOST DAYS WITH A HIGH TEMPERATURE GREATER THAN OR EQUAL TO
100 DEGREES (4 DAYS).
TIED 2ND MOST DAYS WITH A HIGH TEMPERATURE GREATER THAN OR EQUAL TO
90 DEGREES (16 DAYS).
MOST DAYS WITH A LOW TEMPERATURE GREATER THAN OR EQUAL TO 80 DEGREES
(4 DAYS).
MOST DAYS WITH A LOW TEMPERATURE GREATER THAN OR EQUAL TO 70 DEGREES
(16 DAYS. PREVIOUS 15 DAYS IN 1927 AND 1925).
...DAILY...
3 RECORD HIGH TEMPERATURES SET (09/19, 09/18, AN 09/17).
6 RECORD HIGH MINIMUM TEMPERATURES SET OR TIED (09/19, 09/17, 09/05,
09/04, 09/03, AND 09/02).
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GOSSELIN