Climatological Report (Monthly)
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CXUS53 KLOT 011403
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
835 AM CDT THU NOV 1 2012

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2012

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              94   10/06/1963
 LOW               14   10/25/1887
HIGHEST            78   10/24        63      15       84  10/07
LOWEST             32   10/08        43     -11       33  10/30
AVG. MAXIMUM     60.5              62.3    -1.8     65.2
AVG. MINIMUM     42.4              42.8    -0.4     44.6
MEAN             51.5              52.5    -1.0     54.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      1               3.5    -2.5        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        12.06   1954
 MINIMUM         0.18   1897
TOTALS           3.15              3.15    0.00     1.98
DAILY AVG.       0.10              0.10    0.00     0.06
DAYS >= .01        12              10.2     1.8       10
DAYS >= .10         8               5.9     2.1        6
DAYS >= .50         3               2.1     0.9        1
DAYS >= 1.00        0               0.6    -0.6        0
GREATEST
 24 HR. TOTAL    0.81   10/22 TO 10/22

SNOWFALL (INCHES)
RECORDS
 TOTAL            6.3   1989
TOTALS            0.0               0.2    -0.2      0.0
SINCE 7/1         0.0               0.2    -0.2      0.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.1    -0.1        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   10/29 TO 10/29

DEGREE_DAYS
HEATING TOTAL     415               397      18      321
 SINCE 7/1        522               515       7      468
COOLING TOTAL       3                11      -8       14
 SINCE 1/1       1324               843     481     1036
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.4
HIGHEST WIND SPEED/DIRECTION    32/320    DATE  10/14
HIGHEST GUST SPEED/DIRECTION    45/360    DATE  10/30

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              4     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       7
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                      2

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

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