Climatological Report (Monthly)
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CXUS53 KLOT 011602
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1002 AM CST FRI JAN 1 2016

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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              71   12/02/1982
                        12/03/1970
 LOW              -25   12/24/1983
HIGHEST            61   12/14        35      26       50  12/26
                        12/13                             12/14
LOWEST             15   12/19        20      -5        4  12/31
AVG. MAXIMUM     44.5              34.8     9.7     36.9
AVG. MINIMUM     33.5              20.7    12.8     27.1
MEAN             39.0              27.7    11.3     32.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      4              11.4    -7.4        8
DAYS MIN <= 32     15              26.0   -11.0       24
DAYS MIN <= 0       0               1.5    -1.5        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.56   1982
 MINIMUM         0.16   1896
TOTALS           4.87              2.25    2.62     0.79
DAILY AVG.       0.16              0.07    0.09     0.03
DAYS >= .01        13              11.0     2.0        5
DAYS >= .10        10               5.0     5.0        3
DAYS >= .50         3               1.2     1.8        0
DAYS >= 1.00        1               0.3     0.7        0
GREATEST
 24 HR. TOTAL    1.47   12/28 TO 12/28

SNOWFALL (INCHES)
RECORDS
 TOTAL           33.3   1951
 SNOW DEPTH        MM   MM
TOTALS            4.5               8.5    -4.0        T
SINCE 7/1        15.7               9.9     5.8      2.9
SNOWDEPTH AVG.      0                 2      -2        0
DAYS >= 1.0         3               2.5     0.5        0
GREATEST
 SNOW DEPTH         1   12/30                          0  MM
                        12/29
 24 HR TOTAL      1.9   MM

DEGREE_DAYS
HEATING TOTAL     800              1155    -355     1015
 SINCE 7/1       1773              2411    -638     2458
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        806               843     -37      799
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.4
HIGHEST WIND SPEED/DIRECTION    39/250    DATE  12/23
HIGHEST GUST SPEED/DIRECTION    53/250    DATE  12/23

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC              6
NUMBER OF DAYS CLOUDY         24

AVERAGE RH (PERCENT)     80

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                3     RAIN                       8
LIGHT RAIN               17     FREEZING RAIN              1
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                8     SLEET                      1
FOG                      21     FOG W/VIS <= 1/4 MILE      4
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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