Climatological Report (Monthly)
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CXUS53 KLOT 011131 CCA
CLMORD

CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
617 AM CDT TUE SEP 1 2015

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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             102   08/05/1918
 LOW               42   08/28/1986
HIGHEST            92   08/15                         88  08/24
                                                          08/25
LOWEST             51   08/27                         52  08/15
AVG. MAXIMUM     80.9              81.9    -1.0     82.1
AVG. MINIMUM     62.6              62.9    -0.3     65.3
MEAN             71.8              72.4    -0.6     73.7
DAYS MAX >= 90      3               3.6    -0.6        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        17.10   1987
 MINIMUM         0.18   1893
TOTALS           2.16              4.90   -2.74     7.30
DAILY AVG.       0.07              0.16   -0.09     0.24
DAYS >= .01         7               9.8    -2.8       12
DAYS >= .10         6               6.7    -0.7        8
DAYS >= .50         2               2.8    -0.8        4
DAYS >= 1.00        0               1.5    -1.5        2
GREATEST
 24 HR. TOTAL    0.74   08/29 TO 08/29

SNOWFALL (INCHES)
RECORDS
 TOTAL              T   2008
                        2003
TOTALS              T               0.0     0.0      0.0
SINCE 7/1           T               0.0     0.0      0.0

DEGREE_DAYS
HEATING TOTAL       5                 9      -4        0
 SINCE 7/1         18                13       5        5
COOLING TOTAL     224               238     -14      277
 SINCE 1/1        641               740     -99      715
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    37/260    DATE  08/02
HIGHEST GUST SPEED/DIRECTION    52/270    DATE  08/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       4
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      1
HAZE                      8

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

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