Climatological Report (Annual)
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000
CXUS53 KLOT 011452
CLAORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
739 AM CST TUE JAN 1 2013

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE YEAR OF 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2012

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           103   07/06        MM      MM       99  07/21
                        07/05                             07/20
LOWEST              5   01/20        MM      MM       -9  02/10
                        01/15
                        01/19
AVG. MAXIMUM     63.8              59.1     4.7     58.9
AVG. MINIMUM     45.1              40.8     4.3     42.4
MEAN             54.5              49.9     4.4     50.7
DAYS MAX >= 90     46              14.0    32.0       22
DAYS MAX <= 32     17              42.7   -25.7       44
DAYS MIN <= 32    100             121.8   -21.8      113
DAYS MIN <= 0       0               7.1    -7.1        4

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        50.86   2008
 MINIMUM        22.22   1962
TOTALS          26.91             36.89   -9.98    49.83
DAILY AVG.       0.07              0.10   -0.03     0.14
DAYS >= .01       109             124.1   -15.1      142
DAYS >= .10        65              69.1    -4.1       83
DAYS >= .50        18              22.7    -4.7       30
DAYS >= 1.00        4               8.3    -4.3       11
GREATEST
 24 HR. TOTAL    1.62   05/03 TO 05/04              8.21

SNOWFALL (INCHES)
RECORDS
 TOTAL           95.3   1978
TOTALS           19.0              36.3   -17.3     43.4
SINCE 7/1         0.9               9.6    -8.7      1.7
DAYS >= TRACE      43              28.0    15.0       56
DAYS >= 1.0         4              11.4    -7.4        8
GREATEST
 SNOW DEPTH         5   01/21                         21
 24 HR TOTAL      5.4   01/20                          13.6

DEGREE_DAYS
HEATING TOTAL    5065              6339   -1274     6134
COOLING TOTAL    1324               842     482     1036

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

WIND (MPH)
AVERAGE WIND SPEED              9.6
HIGHEST WIND SPEED/DIRECTION    43/230    DATE  07/26
HIGHEST GUST SPEED/DIRECTION    70/250    DATE  07/26

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           88
NUMBER OF DAYS PC            163
NUMBER OF DAYS CLOUDY        115

AVERAGE RH (PERCENT)     64

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             37     MIXED PRECIP               1
HEAVY RAIN               35     RAIN                      55
LIGHT RAIN              117     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       2
HEAVY SNOW                2     SNOW                       5
LIGHT SNOW               41     SLEET                      0
FOG                     132     FOG W/VIS <= 1/4 MILE     13
HAZE                     85

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

&&

RECORDS ESTABLISHED DURING 2012...

ANNUAL --
* WARMEST YEAR ON RECORD WITH AVERAGE TEMPERATURE OF 54.5 DEGREES

JANUARY --
NO RECORDS SET

FEBRUARY --
NO RECORDS SET

MARCH --
* WARMEST MARCH ON RECORD WITH AVERAGE TEMPERATURE OF 53.5 DEGREES
* RECORD WARM LOW TEMPERATURE OF 54 DEGREES ON THE 7TH
* RECORD HIGH TEMPERATURE OF 81 DEGREES ON THE 14TH
* RECORD HIGH TEMPERATURE OF 81 DEGREES ON THE 15TH
* RECORD HIGH TEMPERATURE OF 82 DEGREES ON THE 16TH
* RECORD HIGH TEMPERATURE OF 82 DEGREES ON THE 17TH
* RECORD WARM LOW TEMPERATURE OF 58 DEGREES ON THE 17TH
* RECORD HIGH TEMPERATURE OF 81 DEGREES ON THE 18TH
* TIED RECORD HIGH TEMPERATURE OF 78 DEGREES ON THE 19TH
* RECORD HIGH TEMPERATURE OF 85 DEGREES ON THE 20TH
* RECORD WARM LOW TEMPERATURE OF 63 DEGREES ON THE 20TH
* RECORD HIGH TEMPERATURE OF 87 DEGREES SET ON THE 21ST
* RECORD WARM LOW TEMPERATURE OF 61 DEGREES ON THE 21ST
* RECORD HIGH TEMPERATURE OF 83 DEGREES SET ON THE 22ND
* RECORD WARM LOW TEMPERATURE OF 61 DEGREES SET ON THE 22ND
* RECORD WARM LOW TEMPERATURE OF 55 DEGREES SET ON THE 23RD
* RECORD DAILY PRECIPITATION OF 1.25 INCHES SET ON THE 23RD

APRIL--
NO RECORDS SET

MAY --
* RECORD HIGH TEMPERATURE OF 97 DEGREES SET ON THE 27TH
* RECORD HIGH TEMPERATURE OF 95 DEGREES SET ON THE 28TH
* RECORD WARM LOW TEMPERATURE OF 77 DEGREES SET ONTHE 28TH

JUNE--
* RECORD WARM LOW TEMPERATURE OF 78 DEGREES SET ON THE 19TH

JULY--
* TIED RECORD HIGH TEMPERATURE OF 102 DEGREES SET ON THE 4TH
* RECORD HIGH TEMPERATURE OF 103 DEGREES SET ON THE 5TH
* RECORD HIGH TEMPERATURE OF 103 DEGREES SET ON THE 6TH
* RECORD WARM LOW TEMPERATURE OF 82 DEGREES SET ON THE 6TH
* RECORD WARM LOW TEMPERATURE OF 81 DEGREES SET ON THE 23RD
* 3RD WARMEST JULY ON RECORD WITH AVERAGE TEMPERATURE OF 81.1 DEGREES

AUGUST --
NO RECORDS SET

SEPTEMBER --
NO RECORDS SET

OCTOBER --
NO RECORDS SET

NOVEMBER --
NO RECORDS SET

DECEMBER --
NO RECORDS SET

$$






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