Climatological Report (Monthly)
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CXUS53 KLOT 011807
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1159 AM CST SUN FEB 1 2015

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2015

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            43   01/24                         45  01/13
LOWEST             -8   01/08                        -16  01/06
AVG. MAXIMUM     29.0              31.0    -2.0     24.6
AVG. MINIMUM     15.5              16.5    -1.0      6.7
MEAN             22.3              23.8    -1.5     15.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     16              16.1    -0.1       21
DAYS MIN <= 32     31              28.0     3.0       31
DAYS MIN <= 0       6               3.8     2.2       13

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.84   1916
 MINIMUM         0.10   1981
TOTALS           1.41              1.73   -0.32     2.82
DAILY AVG.       0.05              0.06   -0.01     0.09
DAYS >= .01        12              10.5     1.5       16
DAYS >= .10         5               4.7     0.3        8
DAYS >= .50         1               0.9     0.1        2
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
 24 HR. TOTAL    0.59   01/03 TO 01/04

SNOWFALL (INCHES)
RECORDS
 TOTAL           42.5   1918
TOTALS           13.9              10.8     3.1     33.7
SINCE 7/1        16.8              20.7    -3.9     48.8
SNOWDEPTH AVG.      2                 3      -1        4
DAYS >= 1.0         6               3.7     2.3        9
GREATEST
 SNOW DEPTH         6   01/14                         11  01/06
                        01/13                             01/05
                        01/12
 24 HR TOTAL      3.0   01/08 TO 01/08

DEGREE_DAYS
HEATING TOTAL    1317              1279      38     1521
 SINCE 7/1       3775              3690      85     4087
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
HIGHEST WIND SPEED/DIRECTION    30/330    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    39/300    DATE  01/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY         15

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               1
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          5     HAIL                       0
HEAVY SNOW                1     SNOW                       5
LIGHT SNOW               18     SLEET                      2
FOG                      15     FOG W/VIS <= 1/4 MILE      0
HAZE                      8

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

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