Climatological Report (Daily)
Issued by NWS
Issued by NWS
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076
CDUS43 KLOT 182134
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
434 PM CDT TUE AUG 18 2026
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 18 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 81 11:18 AM 98 1947 83 -2 87
MINIMUM 66 5:45 AM 49 1963 65 1 71
AVERAGE 74 74 0 79
PRECIPITATION (IN)
TODAY 0.00 2.85 1990 0.14 -0.14 1.73
MONTH TO DATE 4.10 2.53 1.57 4.53
SINCE JUN 1 14.46 10.34 4.12 12.45
SINCE JAN 1 30.05 24.99 5.06 21.95
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 JUN 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 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 11 33 -22 13
SINCE JUL 1 0 2 -2 0
COOLING
TODAY 9 9 0 14
MONTH TO DATE 188 174 14 224
SINCE JUN 1 743 699 44 913
SINCE JAN 1 821 769 52 947
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 17 HIGHEST WIND DIRECTION SW (230)
HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION S (200)
AVERAGE WIND SPEED 8.1
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 87 5:00 AM
LOWEST 56 11:00 AM
AVERAGE 72
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1947
1983
MINIMUM TEMPERATURE (F) 65 51 1992
SUNRISE AND SUNSET
AUGUST 18 2026........SUNRISE 6:03 AM CDT SUNSET 7:47 PM CDT
AUGUST 19 2026........SUNRISE 6:04 AM CDT SUNSET 7:46 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$