400
ASUS43 KLOT 201708
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1200 PM CDT WED MAY 20 2026
NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR S TO VISIBILITY.
* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
REPORT WEATHER SUCH AS PRECIPITATION OR FOG.
ILZ001-002-007-009-015-016-024-201800-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE PTSUNNY 62 45 53 NE9 30.25F TC 17
STERLING* MOSUNNY 62 43 49 E10 30.26S TC 17
SAVANNA* CLOUDY 62 41 47 NE9 30.27F TC 16
ILZ003-004-008-010-011-017-018-201800-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD MOSUNNY 63 40 42 N10 30.27R TC 17
FREEPORT* PTSUNNY 61 44 53 NE6 30.28F TC 16
ROCHELLE* MOSUNNY 62 39 42 NE12 30.25S TC 17
DE KALB* MOSUNNY 60 42 51 NE13 30.25S TC 15
PERU* MOSUNNY 63 45 51 NE13 30.24S TC 17
ILZ005-006-012>014-019>023-201800-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTSUNNY 58 42 55 NE17G25 30.25S TC 14
CHICAGO-MIDWAY PTSUNNY 59 41 51 NE18 30.26R TC 15
AURORA PTSUNNY 62 45 53 E9G22 30.24S TC 17
JOLIET* PTSUNNY 63 47 55 N10 30.24S TC 17
WAUKEGAN PTSUNNY 54 42 64 NE15G28 30.27S TC 12
DUPAGE AIRPORT MOSUNNY 60 44 55 MISG 30.24S TC 16
KANKAKEE* CLOUDY 63 47 55 NE13 30.23S TC 17
WHEELING PTSUNNY 57 42 57 E15G24 30.28S TC 14
MORRIS* CLOUDY 63 46 55 E10 30.23S TC 17
ROMEOVILLE* MOSUNNY 61 45 55 NE17 30.24S TC 16
LANSING* PTSUNNY 58 41 52 NE17 30.25S TC 14
NORTHERLY ISL* N/A 55 47 74 N10 N/A TC 13
LMZ740>746-201800-
SOUTHERN LAKE MICHIGAN
STATION/POSITION SKY/WX TEMP WIND PRES VSBY WAVE
AIR SEA DIR/SP/G HT/PER
(F) (DEG/KT/KT) (MB) (MI) (FT/S)
WINTHROP HARBOR 47 1022.9 1/ 3
WAUKEGAN HARBOR 50 52 350/ 16/ 23 1024.2 1/ 3
WILMETTE BUOY 51 60/ 16/ 19 1025.7S 2/ 3
CHICAGO BUOY 52 54 10/ 16/ 19 1023.4 2/ 4
HARRISON CRIB 51 10/ 16/ 16 N/A
NORTHERLY ISL 55 350/ 8/ 13 N/A
CALUMET HARBOR 54 350/ 10/ 14 1024.5S
BURNS HARBOR 51 20/ 6/ 7 1024.7S
MICHIGAN CITY 51 10/ 14/ 15 1023.7S
ST. JOSEPH BUOY 51 360/ 16/ 21 1024.7R 2/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-201800-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY PTSUNNY 58 47 66 N9 30.24F TC 14
GALESBURG* CLOUDY 60 45 57 N12 30.26S TC 16
MACOMB* PTSUNNY 60 49 65 CALM 30.27F TC 16
JACKSONVILLE* PTSUNNY 61 51 68 N10 30.22S TC 16
PITTSFIELD* MOSUNNY 61 49 65 NE8 30.24S TC 16
ILZ028>032-037-038-041>044-048-051>054-059>061-201800-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC PTSUNNY 63 48 59 MISG 30.22F TC 17
BLOOMINGTON PTSUNNY 62 49 62 N12 30.22F TC 17
DECATUR CLOUDY 61 52 72 NE13 30.20S TC 16
PEORIA MOSUNNY 62 46 55 NE7 30.23S TC 17
LACON* SUNNY 62 45 53 NW7 30.23S TC 17
LINCOLN* PTSUNNY 64 52 64 NE8 30.21F TC 18
SPRINGFIELD PTSUNNY 62 51 67 N10 30.21S TC 17
TAYLORVILLE PTSUNNY 61 54 77 NE9 30.21S TC 16
ILZ033-039-045-046-055>057-062-063-201800-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLOUDY 62 50 64 NE12 30.20S TC 17
DANVILLE* CLOUDY 65 52 62 N13 30.20F TC 18
RANTOUL* CLOUDY 63 48 58 NE12G17 30.21S TC 17
MATTOON PTSUNNY 62 54 74 N12 30.17S TC 17
PARIS* CLOUDY 61 51 71 N8 30.19S TC 16
ILZ079-100>102-201800-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON MOSUNNY 61 50 67 N9 30.20F TC 16
CAHOKIA* PTSUNNY 63 52 67 N9 30.19F TC 17
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-201800-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE LGT RAIN 61 55 82 N8 30.17S TC 16
CAIRO* CLOUDY 64 62 95 N8 30.14S TC 18
EFFINGHAM* PTSUNNY 62 56 81 N8 30.19F TC 17
MARION LGT RAIN 61 57 88 N9 30.17S TC 16
MT. VERNON CLOUDY 61 54 77 VRB7 30.17F TC 16
CENTRALIA* CLOUDY 62 53 74 CALM 30.18S TC 16
SALEM* PTSUNNY 63 57 80 MISG 30.18S TC 17
METROPOLIS* LGT RAIN 63 63 100 N9 30.12F TC 17
ILZ067-068-072-073-078-083-087-091-201800-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE LGT RAIN 62 58 86 N9 30.15F TC 17
FLORA* CLOUDY 61 55 82 N12 30.17F TC 16
FAIRFIELD* CLOUDY 60 55 81 N9 30.16S TC 16
HARRISBURG* LGT RAIN 62 58 88 N6 30.16F TC 16
ROBINSON* PTSUNNY 63 59 88 N9 30.15F TC 17
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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