Climatological Report (Monthly)
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CXUS53 KLOT 011322
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
708 AM CST WED JAN 1 2014

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 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              71   12/02/1982
                        12/03/1970
 LOW              -25   12/24/1983
HIGHEST            56   12/04                         70  12/03
LOWEST             -6   12/10                         14  12/30
AVG. MAXIMUM     31.1              34.8    -3.7     42.5
AVG. MINIMUM     15.6              20.7    -5.1     29.7
MEAN             23.4              27.7    -4.3     36.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     16              11.4     4.6        3
DAYS MIN <= 32     26              26.0     0.0       22
DAYS MIN <= 0       5               1.5     3.5        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.56   1982
 MINIMUM         0.16   1896
TOTALS           1.94              2.25   -0.31     2.21
DAILY AVG.       0.06              0.07   -0.01     0.07
DAYS >= .01        18              11.0     7.0       10
DAYS >= .10         6               5.0     1.0        4
DAYS >= .50         0               1.2    -1.2        1
DAYS >= 1.00        0               0.3    -0.3        1
GREATEST
 24 HR. TOTAL    0.44   12/21 TO 12/22

SNOWFALL (INCHES)
RECORDS
 TOTAL           33.3   1951
TOTALS           14.2               8.2     6.0      0.9
SINCE 7/1        15.1               9.7     5.4      0.9
SNOWDEPTH AVG.      1                 2      -1        0
DAYS >= 1.0         4               2.5     1.5        0
GREATEST
 SNOW DEPTH         5   12/16                         -1  12/21
 24 HR TOTAL      4.0   12/14 TO 12/14

DEGREE_DAYS
HEATING TOTAL    1283              1155     128      887
 SINCE 7/1       2566              2411     155     2137
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        933               843      90     1324
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.9
HIGHEST WIND SPEED/DIRECTION    29/270    DATE  12/10
HIGHEST GUST SPEED/DIRECTION    36/220    DATE  12/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            2
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         18

AVERAGE RH (PERCENT)     74

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       3
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW               17     SLEET                      1
FOG                      19     FOG W/VIS <= 1/4 MILE      1
HAZE                      9

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

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