Climatological Report (Daily)
Issued by NWS
Issued by NWS
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
555
CDUS43 KLOT 190635
CLIORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
135 AM CDT TUE AUG 19 2025
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR AUGUST 18 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 87 3:06 PM 98 1947 83 4 80
MINIMUM 71 5:30 PM 49 1963 65 6 68
AVERAGE 79 74 5 74
PRECIPITATION (IN)
YESTERDAY 1.73 2.85 1990 0.14 1.59 0.01
MONTH TO DATE 4.53 2.53 2.00 1.50
SINCE JUN 1 12.45 10.34 2.11 10.49
SINCE JAN 1 21.95 24.99 -3.04 25.76
SNOWFALL (IN)
YESTERDAY 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 T
SINCE JUL 1 0.0 0.0 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 13 33 -20 6
SINCE JUL 1 0 2 -2 0
COOLING
YESTERDAY 14 9 5 9
MONTH TO DATE 224 174 50 173
SINCE JUN 1 913 699 214 767
SINCE JAN 1 947 769 178 847
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 24 HIGHEST WIND DIRECTION NW (310)
HIGHEST GUST SPEED 33 HIGHEST GUST DIRECTION W (260)
AVERAGE WIND SPEED 8.3
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
THUNDERSTORM
HEAVY RAIN
RAIN
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 100 8:00 PM
LOWEST 70 2:00 PM
AVERAGE 85
..........................................................
THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 82 99 1947
1983
MINIMUM TEMPERATURE (F) 65 51 1992
SUNRISE AND SUNSET
AUGUST 19 2025........SUNRISE 6:04 AM CDT SUNSET 7:45 PM CDT
AUGUST 20 2025........SUNRISE 6:05 AM CDT SUNSET 7:44 PM CDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$