<Table> <Tr> <Th colspan="14"> ( hide ) Climate data for Chicago Aurora Municipal Airport , Illinois 1981 -- 2010 normals </Th> </Tr> <Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Record high ° F ( ° C ) </Th> <Td> 67 ( 19 ) </Td> <Td> 72 ( 22 ) </Td> <Td> 83 ( 28 ) </Td> <Td> 93 ( 34 ) </Td> <Td> 105 ( 41 ) </Td> <Td> 106 ( 41 ) </Td> <Td> 111 ( 44 ) </Td> <Td> 105 ( 41 ) </Td> <Td> 103 ( 39 ) </Td> <Td> 90 ( 32 ) </Td> <Td> 81 ( 27 ) </Td> <Td> 69 ( 21 ) </Td> <Td> 111 ( 44 ) </Td> </Tr> <Tr> <Th> Average high ° F ( ° C ) </Th> <Td> 29.1 ( − 1.6 ) </Td> <Td> 33.7 ( 0.9 ) </Td> <Td> 47.0 ( 8.3 ) </Td> <Td> 60.0 ( 15.6 ) </Td> <Td> 70.6 ( 21.4 ) </Td> <Td> 80.1 ( 26.7 ) </Td> <Td> 83.5 ( 28.6 ) </Td> <Td> 81.2 ( 27.3 ) </Td> <Td> 74.9 ( 23.8 ) </Td> <Td> 62.2 ( 16.8 ) </Td> <Td> 47.8 ( 8.8 ) </Td> <Td> 32.8 ( 0.4 ) </Td> <Td> 58.6 ( 14.8 ) </Td> </Tr> <Tr> <Th> Daily mean ° F ( ° C ) </Th> <Td> 20.8 ( − 6.2 ) </Td> <Td> 24.9 ( − 3.9 ) </Td> <Td> 37.0 ( 2.8 ) </Td> <Td> 48.5 ( 9.2 ) </Td> <Td> 58.8 ( 14.9 ) </Td> <Td> 68.8 ( 20.4 ) </Td> <Td> 71.7 ( 22.1 ) </Td> <Td> 70.1 ( 21.2 ) </Td> <Td> 62.8 ( 17.1 ) </Td> <Td> 50.6 ( 10.3 ) </Td> <Td> 38.1 ( 3.4 ) </Td> <Td> 25.1 ( − 3.8 ) </Td> <Td> 48.1 ( 9 ) </Td> </Tr> <Tr> <Th> Average low ° F ( ° C ) </Th> <Td> 12.6 ( − 10.8 ) </Td> <Td> 16.2 ( − 8.8 ) </Td> <Td> 26.9 ( − 2.8 ) </Td> <Td> 37.0 ( 2.8 ) </Td> <Td> 47.1 ( 8.4 ) </Td> <Td> 57.5 ( 14.2 ) </Td> <Td> 59.8 ( 15.4 ) </Td> <Td> 59.0 ( 15 ) </Td> <Td> 50.7 ( 10.4 ) </Td> <Td> 39.0 ( 3.9 ) </Td> <Td> 28.4 ( − 2 ) </Td> <Td> 17.5 ( − 8.1 ) </Td> <Td> 37.6 ( 3.1 ) </Td> </Tr> <Tr> <Th> Record low ° F ( ° C ) </Th> <Td> − 33 ( − 36 ) </Td> <Td> − 25 ( − 32 ) </Td> <Td> − 15 ( − 26 ) </Td> <Td> 8 ( − 13 ) </Td> <Td> 21 ( − 6 ) </Td> <Td> 34 ( 1 ) </Td> <Td> 40 ( 4 ) </Td> <Td> 37 ( 3 ) </Td> <Td> 25 ( − 4 ) </Td> <Td> 11 ( − 12 ) </Td> <Td> − 11 ( − 24 ) </Td> <Td> − 25 ( − 32 ) </Td> <Td> − 33 ( − 36 ) </Td> </Tr> <Tr> <Th> Average precipitation inches ( mm ) </Th> <Td> 1.47 ( 37.3 ) </Td> <Td> 1.62 ( 41.1 ) </Td> <Td> 2.23 ( 56.6 ) </Td> <Td> 3.38 ( 85.9 ) </Td> <Td> 4.26 ( 108.2 ) </Td> <Td> 4.01 ( 101.9 ) </Td> <Td> 4.19 ( 106.4 ) </Td> <Td> 4.12 ( 104.6 ) </Td> <Td> 3.44 ( 87.4 ) </Td> <Td> 3.12 ( 79.2 ) </Td> <Td> 3.14 ( 79.8 ) </Td> <Td> 1.96 ( 49.8 ) </Td> <Td> 36.86 ( 936.2 ) </Td> </Tr> <Tr> <Th> Average snowfall inches ( cm ) </Th> <Td> 100 ( 254 ) </Td> <Td> 70 ( 178 ) </Td> <Td> 37 ( 94 ) </Td> <Td> 8 ( 20 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> ( 3 ) </Td> <Td> 14 ( 36 ) </Td> <Td> 75 ( 191 ) </Td> <Td> 305 ( 775 ) </Td> </Tr> <Tr> <Th> Average precipitation days ( ≥ 0.01 in ) </Th> <Td> 9.7 </Td> <Td> 7.8 </Td> <Td> 10.4 </Td> <Td> 11.8 </Td> <Td> 11.2 </Td> <Td> 10.2 </Td> <Td> 9.3 </Td> <Td> 10.0 </Td> <Td> 8.9 </Td> <Td> 8.9 </Td> <Td> 10.2 </Td> <Td> 10.7 </Td> <Td> 119.1 </Td> </Tr> <Tr> <Th> Average snowy days ( ≥ 0.1 in ) </Th> <Td> 6.7 </Td> <Td> 4.5 </Td> <Td> 2.1 </Td> <Td> 0.4 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td>
<Table> <Tr> <Th colspan="14"> ( hide ) Climate data for Chicago Aurora Municipal Airport , Illinois 1981 -- 2010 normals </Th> </Tr> <Tr> <Th> Month </Th> <Th> Jan </Th> <Th> Feb </Th> <Th> Mar </Th> <Th> Apr </Th> <Th> May </Th> <Th> Jun </Th> <Th> Jul </Th> <Th> Aug </Th> <Th> Sep </Th> <Th> Oct </Th> <Th> Nov </Th> <Th> Dec </Th> <Th> Year </Th> </Tr> <Tr> <Th> Record high ° F ( ° C ) </Th> <Td> 67 ( 19 ) </Td> <Td> 72 ( 22 ) </Td> <Td> 83 ( 28 ) </Td> <Td> 93 ( 34 ) </Td> <Td> 105 ( 41 ) </Td> <Td> 106 ( 41 ) </Td> <Td> 111 ( 44 ) </Td> <Td> 105 ( 41 ) </Td> <Td> 103 ( 39 ) </Td> <Td> 90 ( 32 ) </Td> <Td> 81 ( 27 ) </Td> <Td> 69 ( 21 ) </Td> <Td> 111 ( 44 ) </Td> </Tr> <Tr> <Th> Average high ° F ( ° C ) </Th> <Td> 29.1 ( − 1.6 ) </Td> <Td> 33.7 ( 0.9 ) </Td> <Td> 47.0 ( 8.3 ) </Td> <Td> 60.0 ( 15.6 ) </Td> <Td> 70.6 ( 21.4 ) </Td> <Td> 80.1 ( 26.7 ) </Td> <Td> 83.5 ( 28.6 ) </Td> <Td> 81.2 ( 27.3 ) </Td> <Td> 74.9 ( 23.8 ) </Td> <Td> 62.2 ( 16.8 ) </Td> <Td> 47.8 ( 8.8 ) </Td> <Td> 32.8 ( 0.4 ) </Td> <Td> 58.6 ( 14.8 ) </Td> </Tr> <Tr> <Th> Daily mean ° F ( ° C ) </Th> <Td> 20.8 ( − 6.2 ) </Td> <Td> 24.9 ( − 3.9 ) </Td> <Td> 37.0 ( 2.8 ) </Td> <Td> 48.5 ( 9.2 ) </Td> <Td> 58.8 ( 14.9 ) </Td> <Td> 68.8 ( 20.4 ) </Td> <Td> 71.7 ( 22.1 ) </Td> <Td> 70.1 ( 21.2 ) </Td> <Td> 62.8 ( 17.1 ) </Td> <Td> 50.6 ( 10.3 ) </Td> <Td> 38.1 ( 3.4 ) </Td> <Td> 25.1 ( − 3.8 ) </Td> <Td> 48.1 ( 9 ) </Td> </Tr> <Tr> <Th> Average low ° F ( ° C ) </Th> <Td> 12.6 ( − 10.8 ) </Td> <Td> 16.2 ( − 8.8 ) </Td> <Td> 26.9 ( − 2.8 ) </Td> <Td> 37.0 ( 2.8 ) </Td> <Td> 47.1 ( 8.4 ) </Td> <Td> 57.5 ( 14.2 ) </Td> <Td> 59.8 ( 15.4 ) </Td> <Td> 59.0 ( 15 ) </Td> <Td> 50.7 ( 10.4 ) </Td> <Td> 39.0 ( 3.9 ) </Td> <Td> 28.4 ( − 2 ) </Td> <Td> 17.5 ( − 8.1 ) </Td> <Td> 37.6 ( 3.1 ) </Td> </Tr> <Tr> <Th> Record low ° F ( ° C ) </Th> <Td> − 33 ( − 36 ) </Td> <Td> − 25 ( − 32 ) </Td> <Td> − 15 ( − 26 ) </Td> <Td> 8 ( − 13 ) </Td> <Td> 21 ( − 6 ) </Td> <Td> 34 ( 1 ) </Td> <Td> 40 ( 4 ) </Td> <Td> 37 ( 3 ) </Td> <Td> 25 ( − 4 ) </Td> <Td> 11 ( − 12 ) </Td> <Td> − 11 ( − 24 ) </Td> <Td> − 25 ( − 32 ) </Td> <Td> − 33 ( − 36 ) </Td> </Tr> <Tr> <Th> Average precipitation inches ( mm ) </Th> <Td> 1.47 ( 37.3 ) </Td> <Td> 1.62 ( 41.1 ) </Td> <Td> 2.23 ( 56.6 ) </Td> <Td> 3.38 ( 85.9 ) </Td> <Td> 4.26 ( 108.2 ) </Td> <Td> 4.01 ( 101.9 ) </Td> <Td> 4.19 ( 106.4 ) </Td> <Td> 4.12 ( 104.6 ) </Td> <Td> 3.44 ( 87.4 ) </Td> <Td> 3.12 ( 79.2 ) </Td> <Td> 3.14 ( 79.8 ) </Td> <Td> 1.96 ( 49.8 ) </Td> <Td> 36.86 ( 936.2 ) </Td> </Tr> <Tr> <Th> Average snowfall inches ( cm ) </Th> <Td> 100 ( 254 ) </Td> <Td> 70 ( 178 ) </Td> <Td> 37 ( 94 ) </Td> <Td> 8 ( 20 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> 0 ( 0 ) </Td> <Td> ( 3 ) </Td> <Td> 14 ( 36 ) </Td> <Td> 75 ( 191 ) </Td> <Td> 305 ( 775 ) </Td> </Tr> <Tr> <Th> Average precipitation days ( ≥ 0.01 in ) </Th> <Td> 9.7 </Td> <Td> 7.8 </Td> <Td> 10.4 </Td> <Td> 11.8 </Td> <Td> 11.2 </Td> <Td> 10.2 </Td> <Td> 9.3 </Td> <Td> 10.0 </Td> <Td> 8.9 </Td> <Td> 8.9 </Td> <Td> 10.2 </Td> <Td> 10.7 </Td> <Td> 119.1 </Td> </Tr> <Tr> <Th> Average snowy days ( ≥ 0.1 in ) </Th> <Td> 6.7 </Td> <Td> 4.5 </Td> <Td> 2.1 </Td> <Td> 0.4 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td> 0 </Td> <Td>
when does it usually stop snowing in chicago
when does it usually stop snowing in chicago
May
May