Climatological Report (Monthly)
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049
CXUS53 KLOT 011211
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
643 AM CDT FRI MAY 1 2015

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF APRIL 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              91   04/22/1980
                        04/30/1942
 LOW                7   04/07/1982
HIGHEST            78   04/17                         80  04/12
LOWEST             28   04/04                         26  04/16
                                                          04/15
AVG. MAXIMUM     60.0              59.0     1.0     59.2
AVG. MINIMUM     38.8              38.8     0.0     37.9
MEAN             49.4              48.9     0.5     48.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      4               6.3    -2.3        6
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.68   2013
 MINIMUM         0.14   1899
TOTALS           2.87              3.38   -0.51     2.84
DAILY AVG.       0.10              0.11   -0.01     0.09
DAYS >= .01         9              12.0    -3.0       11
DAYS >= .10         6               6.4    -0.4        6
DAYS >= .50         1               2.4    -1.4        3
DAYS >= 1.00        1               0.8     0.2        0
GREATEST
 24 HR. TOTAL    1.44   04/08 TO 04/09

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.6   1938
TOTALS              T               1.2    -1.2      1.4
SINCE 7/1        50.7              36.6    14.1     82.0
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.3    -0.3        1
GREATEST
 SNOW DEPTH         0   MM                             1  04/15
 24 HR TOTAL        T   04/22 TO 04/22

DEGREE_DAYS
HEATING TOTAL     460               492     -32      488
 SINCE 7/1       6550              6067     483     6928
COOLING TOTAL       0                 9      -9        1
 SINCE 1/1          0                10     -10        1
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.5
HIGHEST WIND SPEED/DIRECTION    38/270    DATE  04/21
HIGHEST GUST SPEED/DIRECTION    52/280    DATE  04/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         10

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       4
LIGHT RAIN               14     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      2
HAZE                      6

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

&&
RECORDS FOR THE MONTH OF APRIL...

MONTHLY...NONE

DAILY
APRIL 24...TIED RECORD LOW TEMPERATURE OF 29 DEGREES. PREVIOUS
           RECORD WAS SET IN 1910.


$$






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