Climatological Report (Monthly)
Issued by NWS

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CXUS53 KLOT 011151
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
642 AM CDT TUE MAY 1 2018

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF APRIL 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2018

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            80   04/30                         82  04/15
LOWEST             20   04/07                         34  04/01
AVG. MAXIMUM     50.0              59.0    -9.0     63.8
AVG. MINIMUM     32.4              38.8    -6.4     43.7
MEAN             41.2              48.9    -7.7     53.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32     16                 7       9        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.68   2013
 MINIMUM         0.14   1899
TOTALS           2.72              3.38   -0.66     6.43
DAILY AVG.       0.09              0.11   -0.02     0.21
DAYS >= .01        14              12.0     2.0       14
DAYS >= .10         5               6.4    -1.4       10
DAYS >= .50         2               2.4    -0.4        4
DAYS >= 1.00        0               0.8    -0.8        3
GREATEST
 24 HR. TOTAL    0.96   04/14 TO 04/14           04/29 TO 04/29

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.6   1938
TOTALS            3.2               1.2     2.0      0.0
SINCE 7/1        36.1              36.3    -0.2     26.1
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         1               0.3     0.7
GREATEST
 SNOW DEPTH         1   04/09
 24 HR TOTAL      2.0   04/09 TO 04/09

DEGREE_DAYS
HEATING TOTAL     705               492     213      339
 SINCE 7/1       6030              6067     -37     5049
COOLING TOTAL       0                 9      -9       12
 SINCE 1/1          0                10     -10       12
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.5
RESULTANT WIND SPEED/DIRECTION   4/006
HIGHEST WIND SPEED/DIRECTION    33/040    DATE  04/13
HIGHEST GUST SPEED/DIRECTION    41/030    DATE  04/14


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       3
LIGHT RAIN               10     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW                9     SLEET                      2
FOG                      15     FOG W/VIS <= 1/4 MILE      0
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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