Climatological Report (Monthly)
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CXUS53 KLOT 011341
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
828 AM CDT MON JUN 1 2015

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF MAY 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              98   05/31/1934
 LOW               27   05/02/1875
HIGHEST            83   05/07        70      13       89  05/08
LOWEST             38   05/01        48     -10       37  05/16
AVG. MAXIMUM     70.0              70.0     0.0     71.0
AVG. MINIMUM     50.7              48.3     2.4     49.7
MEAN             60.4              59.1     1.3     60.4
DAYS MAX >= 90      0               0.5    -0.5        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.3    -0.3        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.59   1945
 MINIMUM         0.30   1992
TOTALS           4.66              3.68    0.98     4.98
DAILY AVG.       0.15              0.12    0.03     0.16
DAYS >= .01        15              11.6     3.4       14
DAYS >= .10        11               7.2     3.8        9
DAYS >= .50         3               2.2     0.8        3
DAYS >= 1.00        0               0.8    -0.8        2
GREATEST
 24 HR. TOTAL    1.01   05/08 TO 05/09

DEGREE_DAYS
HEATING TOTAL     187               225     -38      195
 SINCE 7/1       6737              6292     445     7123
COOLING TOTAL      53                44       9       60
 SINCE 1/1         53                54      -1       61
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.2
HIGHEST WIND SPEED/DIRECTION    31/200    DATE  05/26
HIGHEST GUST SPEED/DIRECTION    43/200    DATE  05/26

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY         19

AVERAGE RH (PERCENT)     68

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                4     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                      17     FOG W/VIS <= 1/4 MILE      4
HAZE                      5

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

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