Climatological Report (Annual)
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000
CXUS53 KLOT 011702
CLAORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1057 AM CST FRI JAN 1 2016

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE YEAR OF 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             105   07/24/1934
 LOW              -27   01/20/1985
HIGHEST            92   09/06        MM      MM       91  06/17
                        08/15
                        07/17
LOWEST            -10   02/28        MM      MM      -16  01/06
AVG. MAXIMUM     58.8              59.1    -0.3     56.4
AVG. MINIMUM     41.3              40.8     0.5     38.6
MEAN             50.0              49.9     0.1     47.5
DAYS MAX >= 90     10              14.0    -4.0        3
DAYS MAX <= 32     51              42.7     8.3       72
DAYS MIN <= 32    113             121.8    -8.8      134
DAYS MIN <= 0      16               7.1     8.9       21

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        50.86   2008
 MINIMUM        22.22   1962
TOTALS          39.85             36.89    2.96    39.47
DAILY AVG.       0.11              0.10    0.01     0.11
DAYS >= .01       124             124.1    -0.1      131
DAYS >= .10        84              69.1    14.9       72
DAYS >= .50        24              22.7     1.3       26
DAYS >= 1.00        7               8.3    -1.3        9
GREATEST
 24 HR. TOTAL    2.56   MM                          2.76

SNOWFALL (INCHES)
RECORDS
 TOTAL           95.3   1978
 24 HR TOTAL       MM
 SNOW DEPTH        99   MM
TOTALS           63.5              36.3    27.2     69.8
SINCE 7/1        15.7               9.9     5.8      2.9
SNOWDEPTH AVG.      1                MM      MM        1
DAYS >= TRACE      57              28.0    29.0       73
DAYS >= 1.0        17              11.4     5.6       20
GREATEST
 SNOW DEPTH        18   02/02                         14
 24 HR TOTAL     16.2   MM                           8.7

DEGREE_DAYS
HEATING TOTAL    6091              6339    -248     7027
 SINCE 7/1       1773              2411    -638     2458
COOLING TOTAL     806               842     -36      799
 SINCE 1/1        806               843     -37      799

FREEZE DATES
RECORD
 EARLIEST     09/22/1995
 LATEST       05/25/1992
EARLIEST                        10/15
LATEST                          04/23
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.8
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           0.60
NUMBER OF DAYS FAIR           61
NUMBER OF DAYS PC            153
NUMBER OF DAYS CLOUDY        151

AVERAGE RH (PERCENT)     69

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             33     MIXED PRECIP               1
HEAVY RAIN               34     RAIN                      59
LIGHT RAIN              126     FREEZING RAIN              1
LT FREEZING RAIN          9     HAIL                       2
HEAVY SNOW                5     SNOW                      15
LIGHT SNOW               53     SLEET                      4
FOG                     176     FOG W/VIS <= 1/4 MILE     17
HAZE                     87

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

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