National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
CXUS53 KLOT 011410
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
901 AM CDT WED MAY 1 2013

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

...THE CHICAGO-OHARE IL CLIMATE SUMMARY FOR THE MONTH OF APRIL 2013...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2013

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            85   04/30                         77  04/15
LOWEST             25   04/04                         32  04/11
                        04/03                             04/12
                        04/02
AVG. MAXIMUM     56.3              59.0    -2.7     59.8
AVG. MINIMUM     37.5              38.8    -1.3     41.6
MEAN             46.9              48.9    -2.0     50.7
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      6               6.3    -0.3        2
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.33   1947
 MINIMUM         0.14   1899
TOTALS           8.68R             3.38    5.30     1.65
DAILY AVG.       0.29              0.11    0.18     0.05
DAYS >= .01        14              12.0     2.0       10
DAYS >= .10         8               6.4     1.6        5
DAYS >= .50         4               2.4     1.6        1
DAYS >= 1.00        2               0.8     1.2        0
GREATEST
 24 HR. TOTAL    5.42   04/17 TO 04/18

SNOWFALL (INCHES)
RECORDS
 TOTAL           13.6   1938
TOTALS            0.1               1.2    -1.1      0.0
SINCE 7/1        30.1              36.3    -6.2     19.8
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.3    -0.3        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.1   MM

DEGREE_DAYS
HEATING TOTAL     542               492      50      427
 SINCE 7/1       5938              6067    -129     4790
COOLING TOTAL       8                 9      -1        4
 SINCE 1/1          8                10      -2       43
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              11.8
HIGHEST WIND SPEED/DIRECTION    37/180    DATE  04/06
HIGHEST GUST SPEED/DIRECTION    49/250    DATE  04/08

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.70
NUMBER OF DAYS FAIR            4
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         13

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                       7
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       2
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                2     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      0
HAZE                      1

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

$$