Climatological Report (Monthly)
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CXUS53 KLOT 011310
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
659 AM CST FRI FEB 1 2013

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2013

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              67   01/25/1950
 LOW              -27   01/20/1985
HIGHEST            63   01/29        30      33       57  01/31
LOWEST                  01/22        14     -15        5  01/20
                                                          01/19
                                                          01/15
AVG. MAXIMUM     35.3              31.0     4.3     38.5
AVG. MINIMUM     17.9              16.5     1.4     21.9
MEAN             26.6              23.8     2.8     30.2
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     14              16.1    -2.1       10
DAYS MIN <= 32     28              28.0     0.0       28
DAYS MIN <= 0       1               3.8    -2.8        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.84   1916
 MINIMUM         0.10   1981
TOTALS           3.63              1.73    1.90     1.86
DAILY AVG.       0.12              0.06    0.06     0.06
DAYS >= .01        11              10.5     0.5       12
DAYS >= .10         6               4.7     1.3        5
DAYS >= .50         3               0.9     2.1        1
DAYS >= 1.00        1               0.1     0.9        0
GREATEST
 24 HR. TOTAL    1.43   01/29 TO 01/30

SNOWFALL (INCHES)
RECORDS
 TOTAL           42.5   1918
TOTALS            2.6              10.8    -8.2     12.2
SINCE 7/1         3.5              20.4   -16.9     13.9
SNOWDEPTH AVG.      0                 3      -3        1
DAYS >= 1.0         1               3.7    -2.7        2
GREATEST
 SNOW DEPTH         0   01/25                          5  01/21
                        01/26
 24 HR TOTAL      1.1   01/25 TO 01/25

DEGREE_DAYS
HEATING TOTAL    1182              1279     -97     1071
 SINCE 7/1       3319              3690    -371     3050
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.7
HIGHEST WIND SPEED/DIRECTION    33/270    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    47/MM     DATE   MM

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       5
LIGHT RAIN                8     FREEZING RAIN              1
LT FREEZING RAIN          3     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               10     SLEET                      2
FOG                      15     FOG W/VIS <= 1/4 MILE      2
HAZE                      7

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

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