Climatological Report (Seasonal)
Issued by NWS St Louis, MO

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CXUS53 KLSX 060133 CCB
CLSSTL

CLIMATE REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
1100 AM CST FRI DEC 1 2017

...................................

...THE ST. LOUIS CLIMATE SUMMARY FOR THE SEASON, FROM
9/1/2017 TO 11/30/2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1874 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             104   09/01/2011
                        09/01/1984
                        09/04/1954
 LOW                1   11/30/1964
HIGHEST            97   09/20
LOWEST             24   11/22
AVG. MAXIMUM     71.2              68.0     3.2
AVG. MINIMUM     50.7              49.2     1.5
MEAN             61.0              58.6     2.4
DAYS MAX >= 90      9
DAYS MAX <= 32      0
DAYS MIN <= 32     11
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        21.50   1984
 MINIMUM         2.36   1875
TOTALS           5.51             10.37   -4.86
DAYS >= .01        23
DAYS >= .10        11
DAYS >= .50         4
DAYS >= 1.00        1
GREATEST
 24 HR. TOTAL    1.72   10/09 TO 10/09

SNOWFALL (INCHES)
RECORDS
 TOTAL           11.3   1951
 24 HR TOTAL      7.7   11/26/1980 TO 11/27/1980
TOTALS              T               0.7    -0.7
SINCE 7/1           T               0.7    -0.7
DAYS >= TRACE       5
DAYS >= 1.0         0
GREATEST
 SNOW DEPTH         0
 24 HR TOTAL        T   10/27 TO 10/27
                        10/28 TO 10/28
                        10/31 TO 10/31

DEGREE_DAYS
HEATING TOTAL     702               825    -123
 SINCE 7/1        702               826    -124
COOLING TOTAL     357               247     110
 SINCE 1/1       1959              1646     313
.................................................

WIND (MPH)
AVERAGE WIND SPEED              8.3
HIGHEST WIND SPEED/DIRECTION    32/310    DATE  11/18
HIGHEST GUST SPEED/DIRECTION    49/320    DATE  11/18


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              7     HAIL                       1
FOG W/VIS <= 1/4 MILE     2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

...SEASONAL...

15TH WARMEST METEOROLOGICAL FALL ON RECORD (61.0 DEGREES).

TIED 7TH MOST OCCURRENCES OF A MAXIMUM TEMPERATURE GREATER THAN OR
EQUAL TO 70 DEGREES (57 DAYS).

TIED 5TH LEAST OCCURRENCES OF AT LEAST A QUATER INCH OF PRECIPITATION
(5 DAYS).

...MONTHLY...

7TH DRIEST SEPTEMBER ON RECORD (0.27 INCHES).

...DAILY...

4 RECORD HIGH TEMPERATURES SET OR TIED (9/20...9/22...9/25...AND 11/24).

2 RECORD HIGH MINIMUM TEMPERATURES TIED (9/21 AND 9/26).

1 RECORD RAINFALL VALUE SET (1.72 INCHES ON 10/09).

4 SNOWFALL RECORDS TIED (10/27...10/28...10/31...AND 11/01).

$$



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