Climatological Report (Seasonal)
Issued by NWS

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CXUS53 KLOT 011827
CLSORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1227 PM CST FRI MAR 01 2024

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
12/1/2023 TO 2/29/2024...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2024

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           74   02/27                          59  12/29
LOWEST           -10   01/14                          -8  12/23
                       01/15
AVG. MAXIMUM    41.4               34.6     6.8     38.5
AVG. MINIMUM    28.4               21.6     6.8     25.0
MEAN            34.9               28.1     6.8     31.8
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32    10               38.0   -28.0       23
DAYS MIN <= 32    60               77.9   -17.9       62
DAYS MIN <= 0      3                6.4    -3.4        5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       13.79   1950
 MINIMUM        1.60   1931
TOTALS          7.12               6.07    1.05     8.59
DAILY AVG.      0.08                NAN     NAN     0.10
DAYS >= .01       34               31.0     3.0       28
DAYS >= .10       17               14.7     2.3       17
DAYS >= .50        4                3.3     0.7        7
DAYS >= 1.00       0                0.7    -0.7        4
GREATEST
 24 HR. TOTAL   1.00   01/08 TO 01/09               1.51

SNOWFALL (INCHES)
RECORDS
 TOTAL          80.6   1979
TOTALS          18.5               29.6   -11.1     16.8
SINCE 7/1       21.2               31.6   -10.4     17.9
DAYS >= 1.0        6                9.0    -3.0        7
GREATEST
 SNOW DEPTH        5   01/13                           3  01/30
                       01/19
                                                          01/31
                                                          02/01
 24 HR TOTAL     5.7   01/12 TO 01/13                3.6

DEGREE DAYS
HEATING TOTAL   2724               3318    -594     2970
 SINCE 7/1      3688               4534    -846     4035
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0        0
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.4
HIGHEST WIND SPEED/DIRECTION    37/090    DATE  01/12
HIGHEST GUST SPEED/DIRECTION    55/090    DATE  01/12

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.71
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC             27
NUMBER OF DAYS CLOUDY         51

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       7
LIGHT RAIN               31     FREEZING RAIN              0
LT FREEZING RAIN          4     HAIL                       4
HEAVY SNOW                3     SNOW                       4
LIGHT SNOW               24     SLEET                      5
FOG                      47     FOG W/VIS <= 1/4 MILE      9
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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