National Weather Service Text Product
AFOS product CLISTL
Dates interpreted at 00:00 UTCDisplaying AFOS PIL: CLISTL
Product Timestamp: 2025-09-18 07:27 UTC
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383
CDUS43 KLSX 180727
CLISTL
CLIMATE REPORT
NATIONAL WEATHER SERVICE ST LOUIS MO
227 AM CDT THU SEP 18 2025
...................................
...THE ST. LOUIS CLIMATE SUMMARY FOR SEPTEMBER 17 2025...
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)
YESTERDAY
MAXIMUM 91 306 PM 97 1931 81 10 90
MINIMUM 65 606 AM 37 1937 60 5 64
AVERAGE 78 71 7 77
PRECIPITATION (IN)
YESTERDAY 0.00 2.25 1968 0.09 -0.09 0.00
MONTH TO DATE 0.17 1.76 -1.59 0.08
SINCE SEP 1 0.17 1.76 -1.59 0.08
SINCE JAN 1 32.26 31.43 0.83 31.76
SNOWFALL (IN)
YESTERDAY 0.0 0.0 2015 0.0 0.0 0.0
MONTH TO DATE 0.0 0.0 0.0 0.0
SINCE SEP 1 0.0 0.0 0.0 0.0
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 0
MONTH TO DATE 4 5 -1 3
SINCE SEP 1 4 5 -1 3
SINCE JUL 1 4 6 -2 3
COOLING
YESTERDAY 13 7 6 12
MONTH TO DATE 154 149 5 146
SINCE SEP 1 154 149 5 146
SINCE JAN 1 1675 1599 76 1854
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 9 HIGHEST WIND DIRECTION E (80)
HIGHEST GUST SPEED 13 HIGHEST GUST DIRECTION E (80)
AVERAGE WIND SPEED 3.5
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 70 600 AM
LOWEST 27 500 PM
AVERAGE 49
..........................................................
THE ST. LOUIS CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 80 97 1925
MINIMUM TEMPERATURE (F) 60 42 1973
SUNRISE AND SUNSET
SEPTEMBER 18 2025.....SUNRISE 646 AM CDT SUNSET 704 PM CDT
SEPTEMBER 19 2025.....SUNRISE 647 AM CDT SUNSET 703 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$