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CXUS53 KLOT 011748
CLSORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1148 AM CST SAT MAR 01 2025

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
12/1/2024 TO 2/28/2025...

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             75   02/27/1976
 LOW             -27   01/20/1985
HIGHEST           57   02/28                          74  02/27
LOWEST            -8   01/21                         -10  01/14
                                                          01/15
AVG. MAXIMUM    34.1               34.6    -0.5     41.4
AVG. MINIMUM    20.5               21.6    -1.1     28.4
MEAN            27.3               28.1    -0.8     34.9
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32    42               38.0     4.0       10
DAYS MIN <= 32    72               77.9    -5.9       60
DAYS MIN <= 0      5                6.4    -1.4        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       13.79   1950
 MINIMUM        1.60   1931
TOTALS          4.43               6.07   -1.64     7.12
DAILY AVG.      0.05               0.07   -0.02     0.08
DAYS >= .01       27               31.0    -4.0       34
DAYS >= .10        9               14.7    -5.7       17
DAYS >= .50        3                3.3    -0.3        4
DAYS >= 1.00       1                0.7     0.3        0
GREATEST
 24 HR. TOTAL   1.75   01/30 TO 01/31               1.00

SNOWFALL (INCHES)
RECORDS
 TOTAL          80.6   1979
TOTALS          11.9               29.6   -17.7     18.5
SINCE 7/1       14.8               31.6   -16.8     21.2
DAYS >= 1.0        4                9.0    -5.0        6
GREATEST
 SNOW DEPTH        3   02/16                           5  01/13
                       02/17
                       02/18
                                                          01/19
 24 HR TOTAL     2.8   02/12 TO 02/12                5.7

DEGREE DAYS
HEATING TOTAL   3368               3318      50     2724
 SINCE 7/1      4135               4470    -335     3688
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0        0
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.4
HIGHEST WIND SPEED/DIRECTION    36/020    DATE  01/31
HIGHEST GUST SPEED/DIRECTION    50/250    DATE  02/28

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.68
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             44
NUMBER OF DAYS CLOUDY         38

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       5
LIGHT RAIN               20     FREEZING RAIN              0
LT FREEZING RAIN          6     HAIL                       1
HEAVY SNOW                2     SNOW                       4
LIGHT SNOW               32     SLEET                      1
FOG                      41     FOG W/VIS <= 1/4 MILE      5
HAZE                      8

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

$$