365
CDUS43 KLSX 172227
CLISTL
CLIMATE REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
427 PM CST WED DEC 17 2025
...............................
..THE ST. LOUIS CLIMATE SUMMARY FOR DECEMBER 17 2025
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1874 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 55 348 PM 72 1908 44 11 57
MINIMUM 34 433 AM -3 1875 28 6 33
AVERAGE 45 36 9 45
PRECIPITATION (IN)
TODAY 0.00 1.02 1897 0.08 -0.08 0.11
1959
MONTH TO DATE 0.29 1.33 -1.04 1.71
SINCE DEC 1 0.29 1.33 -1.04 1.71
SINCE JAN 1 38.31 40.53 -2.22 49.64
SNOWFALL (IN)
TODAY 0.0 2.0 1897 0.1 -0.1 0.0
MONTH TO DATE 3.8 1.4 2.4 0.4
SINCE DEC 1 3.8 1.4 2.4 0.4
SINCE JUL 1 10.2 2.3 7.9 3.6
SNOW DEPTH 0
DEGREE DAYS
HEATING
TODAY 20 29 -9 20
MONTH TO DATE 577 455 122 453
SINCE DEC 1 577 455 122 453
SINCE JUL 1 1239 1277 -38 987
COOLING
TODAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE DEC 1 0 0 0 0
SINCE JAN 1 1904 1713 191 2057
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 10 HIGHEST WIND DIRECTION S (160)
HIGHEST GUST SPEED 20 HIGHEST GUST DIRECTION S (170)
AVERAGE WIND SPEED 5.3
SKY COVER
AVERAGE SKY COVER 0.6
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 86 800 AM
LOWEST 48 300 PM
AVERAGE 67
......................................................
THE ST. LOUIS CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 44 69 1877
1939
MINIMUM TEMPERATURE (F) 28 -4 1884
1983
SUNRISE AND SUNSET
DECEMBER 17 2025......SUNRISE 714 AM CST SUNSET 442 PM CST
DECEMBER 18 2025......SUNRISE 715 AM CST SUNSET 442 PM CST
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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