449
ASUS43 KLOT 181708
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1200 PM 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.
ILZ001-002-007-009-015-016-024-181800-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLOUDY 74 68 81 SW6 30.01F TC 23
STERLING* PTSUNNY 77 67 71 SW15 30.02R TC 25
SAVANNA* CLOUDY 75 67 76 SW7 30.01S TC 24
ILZ003-004-008-010-011-017-018-181800-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 77 67 71 SW10 30.00S TC 25
FREEPORT* PTSUNNY 77 70 79 SW14 30.01F TC 25
DE KALB* PTSUNNY 75 65 69 W12 30.03R TC 24
PERU* PTSUNNY 77 66 69 SW6 30.03R TC 25
ILZ005-006-012>014-019>023-181800-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTSUNNY 79 62 56 SW10G20 29.98F HX 80 TC 26
CHICAGO-MIDWAY PTSUNNY 80 64 58 W12 30.00F HX 82 TC 27
AURORA PTSUNNY 77 66 68 SW8 30.01S TC 25
JOLIET* PTSUNNY 80 67 64 SW6 30.02S HX 82 TC 26
WAUKEGAN PTSUNNY 78 66 66 W9 29.98F HX 80 TC 26
DUPAGE AIRPORT PTSUNNY 78 66 66 SW10G22 30.00F HX 80 TC 26
WHEELING PTSUNNY 79 63 57 W9 30.00F HX 80 TC 26
LANSING* MOSUNNY 79 62 55 W12G17 30.02F HX 81 TC 26
NORTHERLY ISL* N/A 79 59 50 W9 N/A HX 80 TC 26
LMZ740>746-181800-
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 76 74 210/ 10/ 14 1015.2F 1
WAUKEGAN HARBOR 76 74 230/ 12/ 17 1016.0F 1
WILMETTE BUOY 76 270/ 10/ 14 1019.3R 1
CHICAGO BUOY 78 73 1015.0F 1
NORTHERLY ISL 78 250/ 9/ 12 N/A
CALUMET HARBOR 79 240/ 5/ 10 1016.3
MICH CITY BUOY 74 74 250/ 8/ 12 N/A 1/ 3
ST. JOSEPH BUOY 73 74 230/ 8/ 10 1017.4R 2/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-181800-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY PTSUNNY 78 67 68 SW10 30.05F HX 80 TC 26
MACOMB* PTSUNNY 76 71 84 SW7 30.07F TC 25
ILZ028>032-037-038-041>044-048-051>054-059>061-181800-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC PTSUNNY 79 66 64 SW8 30.03F HX 81 TC 26
BLOOMINGTON PTSUNNY 77 67 71 SW13G18 30.07F TC 25
DECATUR MOSUNNY 80 65 59 W8 30.08R HX 82 TC 27
PEORIA CLOUDY 78 66 66 SW10 30.04F HX 80 TC 26
LACON* PTSUNNY 75 65 72 SW5 30.03S TC 24
LINCOLN* PTSUNNY 81 67 63 SW5 30.06F HX 83 TC 27
SPRINGFIELD PTSUNNY 79 65 62 SW6 30.06F HX 81 TC 26
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-181800-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN PTSUNNY 77 67 71 W6 30.07S TC 25
MATTOON MOSUNNY 79 65 62 VRB5 30.07R HX 81 TC 26
ILZ079-100>102-181800-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON SUNNY 82 64 54 VRB3 30.07F HX 84 TC 28
BELLEVILLE MOSUNNY 83 69 63 SW7 30.06R HX 86 TC 28
CAHOKIA* SUNNY 84 66 54 CALM 30.07S HX 86 TC 29
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181800-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE SUNNY 82 66 57 VRB3 30.07 HX 85 TC 28
CAIRO* SUNNY 83 69 61 CALM 30.09S HX 87 TC 29
EFFINGHAM* SUNNY 80 65 61 W6 30.09F HX 82 TC 27
MT. VERNON MOSUNNY 84 65 52 S5 30.08F HX 86 TC 29
CENTRALIA* SUNNY 82 64 53 CALM 30.08F HX 84 TC 28
SALEM* N/A 81 65 58 MISG 30.08F HX 83 TC 27
ILZ067-068-072-073-078-083-087-091-181800-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE SUNNY 82 60 47 W3 30.07F HX 82 TC 28
FAIRFIELD* MOSUNNY 81 62 53 S5 30.08F HX 82 TC 27
HARRISBURG* SUNNY 83 64 52 NW6 30.09S HX 84 TC 28
ROBINSON* SUNNY 81 63 54 VRB5 30.06F HX 82 TC 27
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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