Climatological Report (Monthly)
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000
CXUS53 KLOT 011401
CLMMDW


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
858 AM CDT SUN OCT 1 2017

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

...THE CHICAGO-MIDWAY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1928 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH             102   09/15/1939
 LOW               29   09/28/1942
HIGHEST            95   09/23        MM      MM       94
                        09/22
                        09/21
LOWEST             50   09/06        MM      MM       52
                        09/02
AVG. MAXIMUM     79.8              75.3     4.5     79.4
AVG. MINIMUM     61.7              57.5     4.2     64.6
MEAN             70.7              66.4     4.3     72.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        14.17   1961
 MINIMUM         0.01   1979
TOTALS           0.56              3.31   -2.75     0.83

DEGREE_DAYS
HEATING TOTAL      22                77     -55       11
 SINCE 7/1         27                82     -55       11
COOLING TOTAL     204               119      85      229
 SINCE 1/1       1110              1029      81     1421
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.3
HIGHEST WIND SPEED/DIRECTION    26/340    DATE  09/05
HIGHEST GUST SPEED/DIRECTION    34/250    DATE  09/04

AVERAGE RH (PERCENT)     60


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

$$



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