771
CXUS53 KLOT 011622
CLSORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1122 AM CDT SUN JUN 01 2025

...................................

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
3/1/2025 TO 5/31/2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             98   05/31/1934
 LOW             -12   03/04/1873
HIGHEST           94   05/15                          89  05/21
LOWEST            18   03/02                          24  03/18
AVG. MAXIMUM    60.7               58.8     1.9     63.2
AVG. MINIMUM    41.5               40.6     0.9     44.5
MEAN            51.1               49.7     1.4     53.8
DAYS MAX >= 90     1                1.0     0.0        0
DAYS MAX <= 32     0                3.0    -3.0        0
DAYS MIN <= 32    13               26.1   -13.1       14
DAYS MIN <= 0      0                0.2    -0.2        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       17.51   1983
 MINIMUM        2.73   1887
TOTALS          7.00              10.69   -3.69    11.12
DAILY AVG.      0.08               0.12   -0.04     0.12
DAYS >= .01       29               35.6    -6.6       37
DAYS >= .10       19               20.7    -1.7       28
DAYS >= .50        5                6.9    -1.9        7
DAYS >= 1.00       1                2.3    -1.3        0
GREATEST
 24 HR. TOTAL   1.25   04/02 TO 04/02               0.91

SNOWFALL (INCHES)
RECORDS
 TOTAL          29.7   1926
TOTALS           2.8                6.8    -4.0      1.0
SINCE 7/1       17.6               38.4   -20.8     22.2
DAYS >= 1.0        2                2.0     0.0        1
GREATEST
 SNOW DEPTH        2   03/20                           0
 24 HR TOTAL     1.7   03/20 TO 03/20                1.0

DEGREE DAYS
HEATING TOTAL   1293               1474    -181     1081
 SINCE 7/1      5428               5943    -515     4769
COOLING TOTAL     34                 70     -36       80
 SINCE 1/1        34                 70     -36       80
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.8
HIGHEST WIND SPEED/DIRECTION    39/030    DATE  03/11
HIGHEST GUST SPEED/DIRECTION    50/200    DATE  05/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.66
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             43
NUMBER OF DAYS CLOUDY         37

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             13     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                      13
LIGHT RAIN               40     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       4
HEAVY SNOW                1     SNOW                       1
LIGHT SNOW                8     SLEET                      3
FOG                      37     FOG W/VIS <= 1/4 MILE      1
HAZE                      6

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$