Climatological Report (Annual)
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871
CXUS53 KLOT 011325
CLAORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
716 AM CST SUN JAN 1 2017

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE YEAR OF 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2016

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            93   07/24        MM      MM       92  09/06
                        06/20                             08/15
                                                          07/17
LOWEST            -13   12/19        MM      MM      -10  02/28
AVG. MAXIMUM     60.7              59.1     1.6     58.8
AVG. MINIMUM     43.8              40.8     3.0     41.3
MEAN             52.3              49.9     2.4     50.0
DAYS MAX >= 90     16              14.0     2.0       10
DAYS MAX <= 32     40              42.7    -2.7       51
DAYS MIN <= 32    108             121.8   -13.8      113
DAYS MIN <= 0       8               7.1     0.9       16

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        50.86   2008
 MINIMUM        22.22   1962
TOTALS          35.97             36.89   -0.92    39.85
DAILY AVG.       0.10              0.10    0.00     0.11
DAYS >= .01       130             124.1     5.9      124
DAYS >= .10        79              69.1     9.9       84
DAYS >= .50        26              22.7     3.3       24
DAYS >= 1.00        6               8.3    -2.3        7
GREATEST
 24 HR. TOTAL    1.60   10/26 TO 10/26              2.56

SNOWFALL (INCHES)
RECORDS
 TOTAL           95.3   1978
 24 HR TOTAL       MM
 SNOW DEPTH        29   01/14/1979
TOTALS           33.2              36.3    -3.1     63.5
SINCE 7/1        17.7               9.9     7.8     15.7
SNOWDEPTH AVG.      0                MM      MM        1
DAYS >= TRACE      55              28.0    27.0       57
DAYS >= 1.0        10              11.4    -1.4       17
GREATEST
 SNOW DEPTH         6   12/20                         18
                        12/19
                        12/18
 24 HR TOTAL      6.4   12/10 TO 12/11              16.2
                        12/04 TO 12/04

DEGREE_DAYS
HEATING TOTAL    5715              6339    -624     6091
 SINCE 7/1       2060              2411    -351     1773
COOLING TOTAL    1157               842     315      806
 SINCE 1/1       1157               843     314      806

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

WIND (MPH)
AVERAGE WIND SPEED              9.7
HIGHEST WIND SPEED/DIRECTION    45/250    DATE  02/19
HIGHEST GUST SPEED/DIRECTION    62/250    DATE  02/19

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR           57
NUMBER OF DAYS PC            171
NUMBER OF DAYS CLOUDY        138

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             51     MIXED PRECIP               0
HEAVY RAIN               36     RAIN                      65
LIGHT RAIN              131     FREEZING RAIN              0
LT FREEZING RAIN          6     HAIL                       1
HEAVY SNOW                6     SNOW                      13
LIGHT SNOW               51     SLEET                      6
FOG                     161     FOG W/VIS <= 1/4 MILE     18
HAZE                     54

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

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