674
CDUS43 KLOT 172211
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
511 PM CDT THU SEP 17 2026
...............................
..THE CHICAGO-OHARE CLIMATE SUMMARY FOR SEPTEMBER 17 2026
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...............................................................
TEMPERATURE (F)
TODAY
MAXIMUM 80 2:15 PM 93 1955 75 5 83
MINIMUM 66 5:37 AM 37 1984 57 9 61
AVERAGE 73 66 7 72
PRECIPITATION (IN)
TODAY 0.71 2.42 1927 0.11 0.60 0.00
MONTH TO DATE 0.89 1.84 -0.95 0.28
SINCE SEP 1 0.89 1.84 -0.95 0.28
SINCE JAN 1 31.86 28.55 3.31 22.73
SNOWFALL (IN)
TODAY 0.0 0.0 MM 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
TODAY 0 3 -3 0
MONTH TO DATE 3 21 -18 32
SINCE SEP 1 3 21 -18 32
SINCE JUL 1 3 27 -24 37
COOLING
TODAY 8 4 4 7
MONTH TO DATE 180 87 93 64
SINCE SEP 1 180 87 93 64
SINCE JAN 1 1106 959 147 1056
...............................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (20)
HIGHEST GUST SPEED 19 HIGHEST GUST DIRECTION N (360)
AVERAGE WIND SPEED 3.1
SKY COVER
AVERAGE SKY COVER 1.0
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 5:00 AM
LOWEST 79 1:00 PM
AVERAGE 90
......................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 75 94 1955
MINIMUM TEMPERATURE (F) 56 40 1889
1901
1903
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 6:34 AM CDT SUNSET 6:57 PM CDT
SEPTEMBER 18 2026.....SUNRISE 6:35 AM CDT SUNSET 6:56 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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