Climatological Report (Daily)
Issued by NWS
Issued by NWS
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274
CDUS43 KLOT 180639
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
139 AM CDT SUN MAY 18 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR MAY 17 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 71 3:57 PM 94 1962 71 0 81
MINIMUM 54 7:06 AM 36 1973 51 3 59
2002
AVERAGE 63 61 2 70
PRECIPITATION (IN)
YESTERDAY 0.00 3.11 2020 0.15 -0.15 0.00
MONTH TO DATE 0.33 2.52 -2.19 3.05
SINCE MAR 1 5.98 8.72 -2.74 10.11
SINCE JAN 1 8.48 12.68 -4.20 14.26
SNOWFALL (IN)
YESTERDAY 0.0 0.0 MM 0.0 0.0 0.0
MONTH TO DATE T 0.0 0.0 0.0
SINCE MAR 1 2.8 6.8 -4.0 1.0
SINCE JUL 1 17.6 38.4 -20.8 22.2
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 2 6 -4 0
MONTH TO DATE 108 135 -27 54
SINCE MAR 1 1166 1411 -245 1067
SINCE JUL 1 5301 5880 -579 4755
COOLING
YESTERDAY 0 2 -2 5
MONTH TO DATE 26 22 4 21
SINCE MAR 1 34 32 2 30
SINCE JAN 1 34 32 2 30
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 25 HIGHEST WIND DIRECTION W (260)
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 15.6
SKY COVER
AVERAGE SKY COVER 0.8
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 64 6:00 AM
LOWEST 39 4:00 PM
AVERAGE 52
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 71 93 1962
MINIMUM TEMPERATURE (F) 51 34 2002
SUNRISE AND SUNSET
MAY 18 2025...........SUNRISE 5:28 AM CDT SUNSET 8:09 PM CDT
MAY 19 2025...........SUNRISE 5:27 AM CDT SUNSET 8:10 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$