329
ASUS43 KLOT 181601
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1100 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.
ILZ001-002-007-009-015-016-024-181700-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE PTSUNNY 74 67 78 SW7 30.02R TC 23
STERLING* PTSUNNY 77 66 68 SW9 30.01F TC 25
SAVANNA* PTSUNNY 76 66 72 SW6 30.00R TC 24
ILZ003-004-008-010-011-017-018-181700-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD PTSUNNY 78 65 63 SW15 30.00F HX 80 TC 26
FREEPORT* PTSUNNY 78 69 73 SW9G17 30.01S HX 80 TC 25
ILZ005-006-012>014-019>023-181700-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTSUNNY 77 62 59 SW10 30.01R TC 25
CHICAGO-MIDWAY PTSUNNY 78 63 59 W12G21 30.01R HX 80 TC 26
AURORA MOSUNNY 77 65 66 SW12 30.01F TC 25
JOLIET* PTSUNNY 79 66 65 W8 30.02F HX 81 TC 26
WAUKEGAN PTSUNNY 75 66 73 SW9 29.99R TC 24
DUPAGE AIRPORT MOSUNNY 77 65 66 SW12 30.01S TC 25
WHEELING PTSUNNY 77 63 61 SW10 30.02R TC 25
LANSING* PTSUNNY 78 63 60 SW10 30.04R HX 80 TC 26
NORTHERLY ISL* N/A 77 59 53 W10 N/A TC 25
LMZ740>746-181700-
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 73 74 210/ 8/ 10 1015.4R 0
WAUKEGAN HARBOR 74 74 230/ 8/ 10 1016.4R 0
WILMETTE BUOY 74 280/ 6/ 8 1019.0R 1
CHICAGO BUOY 76 73 1015.1R 1
NORTHERLY ISL 76 190/ 5/ 9 N/A
CALUMET HARBOR 76 230/ 3/ 7 1016.4
MICH CITY BUOY 73 74 230/ 6/ 10 N/A 1/ 3
ST. JOSEPH BUOY 73 74 230/ 8/ 10 1017.3R 2/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-181700-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY PTSUNNY 75 67 76 SW10 30.08R TC 24
MACOMB* CLOUDY 75 70 86 SW10 30.08R TC 24
ILZ028>032-037-038-041>044-048-051>054-059>061-181700-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON PTSUNNY 77 65 66 W9 30.08R TC 25
DECATUR PTSUNNY 78 64 61 SW7 30.07F HX 80 TC 26
PEORIA CLOUDY 74 66 76 W7 30.05R TC 23
LINCOLN* PTSUNNY 79 67 65 SW3 30.06R HX 82 TC 26
SPRINGFIELD MOSUNNY 79 65 62 SW8 30.07R HX 81 TC 26
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-181700-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN PTSUNNY 77 67 71 SW5 30.07S TC 25
MATTOON MOSUNNY 78 63 59 CALM 30.06S HX 80 TC 26
ILZ079-100>102-181700-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON MOSUNNY 81 64 57 SW5 30.08R HX 82 TC 27
CAHOKIA* SUNNY 81 66 60 CALM 30.07S HX 83 TC 27
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181700-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE NOT AVBL
MT. VERNON SUNNY 82 62 50 CALM 30.09R HX 83 TC 28
CENTRALIA* MOSUNNY 81 64 57 CALM 30.09S HX 83 TC 27
ILZ067-068-072-073-078-083-087-091-181700-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE SUNNY 80 62 54 SW5 30.08R HX 81 TC 27
FAIRFIELD* SUNNY 79 60 52 CALM 30.09R HX 80 TC 26
HARRISBURG* SUNNY 80 64 56 N3 30.10R 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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