668
CXUS53 KLOT 011921
CLSORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
121 PM CST SUN MAR 01 2026

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
12/1/2025 TO 2/28/2026...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2026

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           65   02/16                          57  02/28
                       02/27
LOWEST           -11   01/23                          -8  01/21
AVG. MAXIMUM    35.0               34.6     0.4     34.1
AVG. MINIMUM    19.6               21.6    -2.0     20.5
MEAN            27.3               28.1    -0.8     27.3
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32    45               38.0     7.0       42
DAYS MIN <= 32    77               77.9    -0.9       72
DAYS MIN <= 0      5                6.4    -1.4        5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       13.79   1950
 MINIMUM        1.60   1931
TOTALS          4.76               6.07   -1.31     4.43
DAILY AVG.      0.05               0.07   -0.02     0.05
DAYS >= .01       29               31.0    -2.0       27
DAYS >= .10        9               14.7    -5.7        9
DAYS >= .50        2                3.3    -1.3        3
DAYS >= 1.00       1                0.7     0.3        1
GREATEST
 24 HR. TOTAL   1.92   01/08 TO 01/08               1.75

SNOWFALL (INCHES)
RECORDS
 TOTAL          80.6   1979
TOTALS          21.9               29.6    -7.7     11.9
SINCE 7/1       32.3               31.6     0.7     14.8
DAYS >= 1.0        7                9.0    -2.0        4
GREATEST
 SNOW DEPTH        8   12/07                           3  02/16
                       12/08
                       12/09
                                                          02/17
                                                          02/18
 24 HR TOTAL     4.8   12/06 TO 12/07                2.8

DEGREE DAYS
HEATING TOTAL   3391               3318      73     3368
 SINCE 7/1      4360               4470    -110     4135
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0        0
................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.2
HIGHEST WIND SPEED/DIRECTION    36/240    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    55/230    DATE  01/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.71
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             34
NUMBER OF DAYS CLOUDY         47

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       2
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       2
HEAVY SNOW                3     SNOW                       5
LIGHT SNOW               43     SLEET                      1
FOG                      38     FOG W/VIS <= 1/4 MILE      6
HAZE                     14

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

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