661
ASUS43 KLOT 180501
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1200 AM CDT TUE AUG 18 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.
ILZ001-002-007-009-015-016-024-180600-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLEAR 66 63 90 CALM 30.03R TC 19
STERLING* CLEAR 65 64 97 SW3 30.05R TC 18
SAVANNA* CLEAR 63 61 93 SE5 30.03R TC 17
ILZ003-004-008-010-011-017-018-180600-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLEAR 64 62 93 SE3 30.03R TC 18
FREEPORT* CLEAR 65 64 95 CALM 30.04R TC 18
ILZ005-006-012>014-019>023-180600-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE CLEAR 70 58 65 SW6 30.01S TC 21
CHICAGO-MIDWAY CLEAR 69 59 70 S7 30.02S TC 21
AURORA CLEAR 65 63 93 CALM 30.02F TC 18
JOLIET* CLEAR 65 65 100 CALM 30.04S TC 19
WAUKEGAN CLEAR 64 60 87 SW6 30.01R TC 18
DUPAGE AIRPORT CLEAR 67 62 84 S5 30.02S TC 19
WHEELING CLEAR 67 59 75 CALM 30.03S TC 19
LANSING* CLEAR 63 60 91 CALM 30.04S TC 17
NORTHERLY ISL* N/A 71 56 58 S5 N/A TC 22
LMZ740>746-180600-
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 71 74 170/ 8/ 10 1015.5F 1/ 5
WAUKEGAN HARBOR 73 74 210/ 10/ 14 1016.5F 1/ 5
WILMETTE BUOY 73 230/ 8/ 12 1019.3R 1/ 5
CHICAGO BUOY 74 73 1015.4R 1/ 4
HARRISON CRIB 74 200/ 11/ 12 N/A
NORTHERLY ISL 72 200/ 3/ 5 N/A
CALUMET HARBOR 70 210/ 3/ 4 1016.9
MICHIGAN CITY 69 210/ 4/ 5 1015.4R
MICH CITY BUOY 72 74 230/ 8/ 10 N/A 1/ 4
ST. JOSEPH BUOY 73 75 240/ 6/ 8 1017.4R 1/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-180600-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY CLEAR 67 64 90 CALM 30.07R TC 19
MACOMB* CLEAR 64 64 100 W3 30.08R TC 18
ILZ028>032-037-038-041>044-048-051>054-059>061-180600-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON CLEAR 66 63 90 S3 30.07S TC 19
DECATUR PTCLDY 66 62 87 SW3 30.07R TC 19
PEORIA CLEAR 68 66 93 S3 30.05R TC 20
LINCOLN* PTCLDY 67 67 100 CALM 30.06R TC 19
SPRINGFIELD PTCLDY 65 65 100 CALM 30.06S TC 18
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-180600-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN PTCLDY 64 63 96 W5 30.06R TC 18
MATTOON MOCLDY 67 63 87 W5 30.06R TC 19
ILZ079-100>102-180600-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BELLEVILLE PTCLDY 70 69 97 CALM 30.05R TC 21
CAHOKIA* PTCLDY 68 67 96 CALM 30.07R TC 20
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-180600-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE NOT AVBL
MARION PTCLDY 66 65 98 CALM 30.07F TC 19
MT. VERNON PTCLDY 66 66 100 CALM 30.07S TC 19
CENTRALIA* PTCLDY 67 67 98 CALM 30.07S TC 20
SALEM* N/A 67 67 99 MISG 30.06S TC 20
ILZ067-068-072-073-078-083-087-091-180600-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE PTCLDY 69 65 86 NW6 30.03F TC 21
FAIRFIELD* PTCLDY 66 65 97 CALM 30.05F TC 19
HARRISBURG* PTCLDY 66 66 99 CALM 30.06F TC 19
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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