Climatological Report (Monthly)
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CXUS53 KLOT 011351
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
835 AM CDT MON MAY 1 2017

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF APRIL 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              91   04/22/1980
                        04/30/1942
 LOW                7   04/07/1982
HIGHEST            82   04/15        59      23       83  04/25
                                                          04/18
LOWEST             34   04/01        39      -5       22  04/09
AVG. MAXIMUM     63.8              59.0     4.8     57.4
AVG. MINIMUM     43.7              38.8     4.9     38.1
MEAN             53.7              48.9     4.8     47.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               6.3    -6.3        7
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.68   2013
 MINIMUM         0.14   1899
TOTALS           6.43              3.38    3.05     2.80
DAILY AVG.       0.21              0.11    0.10     0.09
DAYS >= .01        14              12.0     2.0       14
DAYS >= .10        10               6.4     3.6        7
DAYS >= .50         4               2.4     1.6        1
DAYS >= 1.00        3               0.8     2.2        0
GREATEST
 24 HR. TOTAL    1.95   04/29 TO 04/29           04/27 TO 04/28
                                                          04/28 TO 04/28
                                                          04/28 TO 04/28

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.6   1938
TOTALS            0.0               1.2    -1.2      1.1
SINCE 7/1        26.1              36.3   -10.2     31.2
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.3    -0.3
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0   04/30 TO 04/30

DEGREE_DAYS
HEATING TOTAL     339               492    -153      517
 SINCE 7/1       5049              6067   -1018     5190
COOLING TOTAL      12                 9       3        7
 SINCE 1/1         12                10       2        7
.........................................................

WIND (MPH)
AVERAGE WIND SPEED              11.4
RESULTANT WIND SPEED/DIRECTION   1/081
HIGHEST WIND SPEED/DIRECTION    36/200    DATE  04/10
HIGHEST GUST SPEED/DIRECTION    47/190    DATE  04/09


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              6     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                       9
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      14     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

$$



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