Climatological Report (Daily)
Issued by NWS
Issued by NWS
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673
CDUS43 KLOT 172211
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
511 PM CDT THU SEP 17 2026
...................................
...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR SEPTEMBER 17 2026...
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1928 TO 2026
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 82 2:20 PM 93 1955 76 6 84
MINIMUM 68 5:05 AM 39 1937 58 10 62
AVERAGE 75 67 8 73
PRECIPITATION (IN)
TODAY 1.79R 1.20 1978 0.09 1.70 0.00
2023
MONTH TO DATE 1.90 1.60 0.30 0.26
SINCE SEP 1 1.90 1.60 0.30 0.26
SINCE JAN 1 34.04 25.63 8.41 25.08
DEGREE DAYS
HEATING
TODAY 0 2 -2 0
MONTH TO DATE 2 15 -13 21
SINCE SEP 1 2 15 -13 21
SINCE JUL 1 2 19 -17 23
COOLING
TODAY 10 4 6 8
MONTH TO DATE 194 98 96 84
SINCE SEP 1 194 98 96 84
SINCE JAN 1 1165 1054 111 1225
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 13 HIGHEST WIND DIRECTION E (90)
HIGHEST GUST SPEED 18 HIGHEST GUST DIRECTION S (180)
AVERAGE WIND SPEED 5.5
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
HEAVY RAIN
RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 5:00 AM
LOWEST 72 1:00 PM
AVERAGE 86
..........................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 94 1955
MINIMUM TEMPERATURE (F) 58 39 1929
SUNRISE AND SUNSET
SEPTEMBER 17 2026.....SUNRISE 6:33 AM CDT SUNSET 6:57 PM CDT
SEPTEMBER 18 2026.....SUNRISE 6:34 AM CDT SUNSET 6:55 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$