Climatological Report (Monthly)
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547
CXUS53 KLOT 011505
CLMORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
856 AM CST THU FEB 1 2018

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

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF JANUARY 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              67   01/25/1950
 LOW              -27   01/20/1985
HIGHEST            59   01/11        30      29       59  01/21
LOWEST             -9   01/02        14     -23        0  01/07
                        01/01                             01/06
AVG. MAXIMUM     31.9              31.0     0.9     34.6
AVG. MINIMUM     17.4              16.5     0.9     23.0
MEAN             24.7              23.8     0.9     28.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     16              16.1    -0.1       10
DAYS MIN <= 32     27              28.0    -1.0       23
DAYS MIN <= 0       5               3.8     1.2        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         4.84   1916
 MINIMUM         0.10   1981
TOTALS           1.54              1.73   -0.19     2.87
DAILY AVG.       0.05              0.06   -0.01     0.09
DAYS >= .01        10              10.5    -0.5       13
DAYS >= .10         3               4.7    -1.7        7
DAYS >= .50         1               0.9     0.1        1
DAYS >= 1.00        0               0.1    -0.1        0
GREATEST
 24 HR. TOTAL    0.81   01/22 TO 01/22           01/16 TO 01/17
                                                          01/09 TO 01/09
                                                          01/12 TO 01/12

SNOWFALL (INCHES)
RECORDS
 TOTAL           42.5   1918
TOTALS            4.6              10.8    -6.2      0.6
SINCE 7/1        10.0              20.4   -10.4     18.3
SNOWDEPTH AVG.      1                 3      -2        0
DAYS >= 1.0         1               3.7    -2.7
GREATEST
 SNOW DEPTH         3   01/17
                        01/16
 24 HR TOTAL      2.3   01/15 TO 01/15

DEGREE_DAYS
HEATING TOTAL    1245              1279     -34     1117
 SINCE 7/1       3453              3690    -237     3177
COOLING TOTAL       0                 0       0        0
 SINCE 1/1          0                 0       0        0
...................................................

WIND (MPH)
AVERAGE WIND SPEED              11.7
RESULTANT WIND SPEED/DIRECTION   6/250
HIGHEST WIND SPEED/DIRECTION    32/200    DATE  01/26
HIGHEST GUST SPEED/DIRECTION    42/210    DATE  01/27


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       2
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       1
LIGHT SNOW               10     SLEET                      1
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.

$$




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