NWS SNOW NORMALS (1971-2000) FOR CHICAGO O'HARE 
Source: NCDC, CLIM20-02  1 Oct 2002

#STATION: IL111549 XNP CHICAGO OHARE INTL AP                 120                                        
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 1971-2000 Daily/Monthly Station Normals                                                                
 Provided by National Climatic Data Center/NESDIS/NOAA                                                  
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 Station COOP ID:                           111549                                                      
 Station Name, State, Division, Call:       CHICAGO OHARE INTL AP              IL 02 ORD                
 Latitude, Longitude, Elevation, Elements:  41 59 10 -087 54 51   658 XNP                               
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 Mean Snowfall (tenths of an inch, T = Trace)                                                          
 DAY  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31  MONTH
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JAN   4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  3  3  3  3  3  3  3  3  3  3  3    113
FEB   3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  2              83
MAR   2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  1  1     60
APR   1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  T  T  T  T  T  T  T  T  T  T  T  T  T  T        16
MAY   T  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0      T
JUN   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0         0
JUL   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0      0
AUG   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0      0
SEP   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0         0
OCT   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  T  T  1  1  1      3
NOV   T  T  T  T  T  T  T  T  T  T  T  T  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1        18
DEC   2  2  2  2  2  2  2  2  2  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  3  4  4  4     87
                                                                                                        
#STATION: IL111549 XNP CHICAGO OHARE INTL AP                 120
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 1971-2000 Daily/Monthly Station Normals               
 Provided by National Climatic Data Center/NESDIS/NOAA 
-------------------------------------------------------------------------------------------------
 Station COOP ID:                           111549
 Station Name, State, Division, Call:       CHICAGO OHARE INTL AP              IL 02 ORD
 Latitude, Longitude, Elevation, Elements:  41 59 10 -087 54 51   658 XNP
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 Number of Days with Snowfall >= Threshold (tenths of days)
 THRESHOLD   JAN   FEB   MAR   APR   MAY   JUN   JUL   AUG   SEP   OCT   NOV   DEC   ANNUAL
-------------------------------------------------------------------------------------------------
 >=0.1 inch   84    64    46    12     0     0     0     0     0     3    22    71      302
 >=1.0 inch   35    27    20     4     0     0     0     0     0     1     6    26      119

#STATION: IL111577 XNP CHICAGO MIDWAY AP 3 SW                121                                        
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 1971-2000 Daily/Monthly Station Normals                                                                
 Provided by National Climatic Data Center/NESDIS/NOAA                                                  
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 Station COOP ID:                           111577                                                      
 Station Name, State, Division, Call:       CHICAGO MIDWAY AP 3 SW             IL 02 MDW                
 Latitude, Longitude, Elevation, Elements:  41 44 14 -087 46 39   620 XNP                               
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 Mean Snowfall (tenths of an inch, T = Trace)                                                          
 DAY  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31  MONTH
-------------------------------------------------------------------------------------------------       
JAN   4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  5  5    126
FEB   4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4  3  3  3  3  3  3  3  3  3             103
MAR   3  3  3  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2  1  1  1  1  1  1  1  1     57
APR   1  1  1  1  1  1  1  1  1  1  1  1  1  1  T  T  T  T  T  T  T  T  T  T  T  T  T  T  T  T        14
MAY   T  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0      T
JUN   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0         0
JUL   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0      0
AUG   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0      0
SEP   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0         0
OCT   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  T  T  T  T  T  1      1
NOV   T  T  T  T  T  T  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1        24
DEC   2  2  2  2  3  3  3  3  3  3  3  3  3  3  3  3  4  4  4  4  4  4  4  4  4  4  4  4  4  4  4    104

#STATION: IL111577 XNP CHICAGO MIDWAY AP 3 SW                121
-------------------------------------------------------------------------------------------------
 1971-2000 Daily/Monthly Station Normals               
 Provided by National Climatic Data Center/NESDIS/NOAA 
-------------------------------------------------------------------------------------------------
 Station COOP ID:                           111577
 Station Name, State, Division, Call:       CHICAGO MIDWAY AP 3 SW             IL 02 MDW
 Latitude, Longitude, Elevation, Elements:  41 44 14 -087 46 39   620 XNP
-------------------------------------------------------------------------------------------------
 Number of Days with Snowfall >= Threshold (tenths of days)
 THRESHOLD   JAN   FEB   MAR   APR   MAY   JUN   JUL   AUG   SEP   OCT   NOV   DEC   ANNUAL
-------------------------------------------------------------------------------------------------
 >=0.1 inch   88    63    45    10     1     0     0     0     0     2    27    71      307
 >=1.0 inch   40    29    19     3     0     0     0     0     0     0     8    26      125

