Climatological Report (Daily)
Issued by NWS
Issued by NWS
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CDUS43 KLOT 182134
CLIMDW
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CDT SAT OCT 18 2025
...................................
...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR OCTOBER 18 2025...
VALID TODAY AS OF 0400 PM LOCAL TIME.
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1928 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
TODAY
MAXIMUM 74 12:59 PM 87 1950 63 11 69
MINIMUM 63 5:36 AM 20 1948 46 17 45
AVERAGE 69 54 15 57
PRECIPITATION (IN)
TODAY 0.04 3.18 1985 0.11 -0.07 0.00
MONTH TO DATE 1.63 2.07 -0.44 0.51
SINCE SEP 1 2.19 4.84 -2.65 2.40
SINCE JAN 1 27.01 28.87 -1.86 31.87
DEGREE DAYS
HEATING
TODAY 0 11 -11 8
MONTH TO DATE 46 147 -101 94
SINCE SEP 1 67 206 -139 104
SINCE JUL 1 69 210 -141 104
COOLING
TODAY 4 0 4 0
MONTH TO DATE 67 17 50 16
SINCE SEP 1 271 153 118 235
SINCE JAN 1 1412 1109 303 1358
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION S (190)
AVERAGE WIND SPEED 10.0
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
THUNDERSTORM
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 84 5:00 AM
LOWEST 63 12:00 AM
AVERAGE 74
..........................................................
THE CHICAGO-MIDWAY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 62 84 1971
MINIMUM TEMPERATURE (F) 45 24 1930
SUNRISE AND SUNSET
OCTOBER 18 2025.......SUNRISE 7:07 AM CDT SUNSET 6:04 PM CDT
OCTOBER 19 2025.......SUNRISE 7:08 AM CDT SUNSET 6:03 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$