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000
CXUS53 KLOT 041303
CLAORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
606 AM CST THU JAN 1 2009

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE YEAR OF 2009...

CLIMATE NORMAL PERIOD 1971 TO 2000
CLIMATE RECORD PERIOD 1871 TO 2009

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             105   07/24/1934
 LOW              -27   01/20/1985
HIGHEST            94   06/25        MM      MM
                        06/23
                        06/24
LOWEST            -18   01/16        MM      MM
AVG. MAXIMUM     57.2              58.3    -1.1
AVG. MINIMUM     40.2              39.8     0.4
MEAN             48.7              49.1    -0.4
DAYS MAX >= 90      4              17.8   -13.8
DAYS MAX <= 32     58              45.9    12.1
DAYS MIN <= 32    116             128.5   -12.5
DAYS MIN <= 0      10              10.9    -0.9


PRECIPITATION (INCHES)
RECORD
 MAXIMUM        50.86   2008
 MINIMUM        22.22   1962
TOTALS          42.57             36.27    6.30
DAILY AVG.       0.12              0.10    0.02
DAYS >= .01       138             127.0    11.0
DAYS >= .10        79              69.9     9.1
DAYS >= .50        29              22.5     6.5
DAYS >= 1.00        6               8.1    -2.1
GREATEST
 24 HR. TOTAL    3.97   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM


SNOWFALL (INCHES)
RECORDS
 TOTAL           95.3   1978
 24 HR TOTAL       MM
 SNOW DEPTH        29   01/14/1979
TOTALS           51.0              37.5    13.5
 LIQUID EQUIV    5.10                MM      MM
SINCE 7/1        20.8              10.8    10.0
 LIQUID 7/1      2.08              1.10    0.98
SNOWDEPTH AVG.      1                MM      MM
DAYS >= TRACE      54              30.2    23.8
DAYS >= 1.0        16              11.9     4.1
GREATEST
 SNOW DEPTH         9   01/18
                        01/16
                        01/17
 24 HR TOTAL      8.4   MM
 STORM TOTAL       MM
 (MM/DD(HH))            MM


DEGREE_DAYS
HEATING TOTAL    6429              6498     -69
 SINCE 7/1       2341              2438     -97
COOLING TOTAL     589               830    -241
 SINCE 1/1        589               830    -241


FREEZE DATES
EARLIEST                        10/15
LATEST                          04/23
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.1
HIGHEST WIND SPEED/DIRECTION    38/200    DATE  07/27
HIGHEST GUST SPEED/DIRECTION    51/060    DATE  06/24



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

$$