Climatological Report (Monthly)
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CXUS53 KLOT 011457
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
949 AM CDT SAT OCT 1 2016

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2016...

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

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH             101   09/02/1953
                        09/01/1953
 LOW               29   09/23/1995
                        09/30/1984
                        09/28/1942
HIGHEST            91   09/06        75      16
LOWEST             50   09/28        54      -4
AVG. MAXIMUM     77.7              74.8     2.9
AVG. MINIMUM     61.4              54.3     7.1
MEAN             69.6              64.6     5.0
DAYS MAX >= 90      1               1.0     0.0
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.1    -0.1
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        14.17   1961
 MINIMUM         0.01   1979
TOTALS           1.76              3.21   -1.45
DAILY AVG.       0.06              0.11   -0.05
DAYS >= .01        11               8.3     2.7
DAYS >= .10         5               5.4    -0.4
DAYS >= .50         1               2.0    -1.0
DAYS >= 1.00        0               0.8    -0.8
GREATEST
 24 HR. TOTAL    0.55   09/21 TO 09/21

DEGREE_DAYS
HEATING TOTAL      23               105     -82
 SINCE 7/1         23               118     -95
COOLING TOTAL     165                92      73
 SINCE 1/1       1130               832     298
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.2
RESULTANT WIND SPEED/DIRECTION   1/204
HIGHEST WIND SPEED/DIRECTION    30/130    DATE  09/21
HIGHEST GUST SPEED/DIRECTION    38/280    DATE  09/07


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       6
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

$$




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