581
ASUS43 KLOT 182210
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 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.
ILZ001-002-007-009-015-016-024-182300-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE MOSUNNY 80 69 69 SW15 29.91F HX 83 TC 27
STERLING* PTSUNNY 80 69 69 VRB7 29.92F HX 83 TC 27
SAVANNA* MOSUNNY 80 69 69 SW9 29.91F HX 83 TC 27
ILZ003-004-008-010-011-017-018-182300-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD PTSUNNY 77 68 73 S15 29.93F TC 25
FREEPORT* MOSUNNY 78 71 78 SW14 29.93F HX 81 TC 26
ROCHELLE* PTSUNNY 77 68 73 SW8 29.94F TC 25
DE KALB* CLOUDY 75 69 83 S10G16 29.96S TC 24
ILZ005-006-012>014-019>023-182300-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE CLOUDY 77 66 68 SW8 29.93S TC 25
CHICAGO-MIDWAY CLOUDY 77 67 71 SW10 29.94F TC 25
AURORA CLOUDY 74 68 81 S8 29.95S TC 23
JOLIET* DRIZZLE 75 71 85 S3 29.95F TC 24
WAUKEGAN LGT RAIN 70 66 87 SW8 29.91F TC 21
DUPAGE AIRPORT CLOUDY 75 67 76 SW13 29.94F TC 24
KANKAKEE* CLOUDY 76 67 73 SW5 29.99S TC 25
WHEELING CLOUDY 77 67 71 SW8 29.94F TC 25
ROMEOVILLE* CLOUDY 75 73 94 SW6G12 29.96F TC 24
LANSING* LGT RAIN 75 66 73 SW9 29.96F TC 24
NORTHERLY ISL* N/A 78 63 59 S8 N/A HX 80 TC 26
LMZ740>746-182300-
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 74 200/ 12/ 16 1011.5 1
WAUKEGAN HARBOR 75 74 290/ 8/ 12 1013.9 1
WILMETTE BUOY 76 250/ 10/ 17 1016.9F 1/ 2
CHICAGO BUOY 77 73 1012.7 1/ 2
NORTHERLY ISL 78 240/ 8/ 13 N/A
CALUMET HARBOR 77 200/ 10/ 14 1014.2
MICH CITY BUOY 76 74 230/ 12/ 16 N/A 1/ 3
ST. JOSEPH BUOY 76 74 220/ 6/ 10 1014.8F 1/ 3
ILZ025>027-034>036-040-047-049-050-058-095>099-182300-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY PTSUNNY 82 69 64 SW8 29.98F HX 85 TC 28
GALESBURG* MOSUNNY 80 72 77 S14G20 29.95F HX 83 TC 27
MACOMB* MOSUNNY 80 73 79 SW10 29.98F HX 84 TC 27
JACKSONVILLE* CLOUDY 81 69 65 SW9 29.99S HX 84 TC 27
ILZ028>032-037-038-041>044-048-051>054-059>061-182300-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC CLOUDY 80 69 71 SW9 29.96F HX 82 TC 26
BLOOMINGTON PTSUNNY 79 69 71 SW10 29.99F HX 81 TC 26
DECATUR PTSUNNY 81 66 60 SW9 29.99F HX 83 TC 27
PEORIA PTSUNNY 81 68 64 SW14 29.94F HX 84 TC 27
LACON* PTSUNNY 80 67 64 S9 29.93F HX 82 TC 27
LINCOLN* PTSUNNY 83 69 62 SW7 29.97F HX 86 TC 28
SPRINGFIELD PTSUNNY 82 67 60 SW9 29.98F HX 84 TC 28
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-182300-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN PTSUNNY 80 67 64 SW8 30.00F HX 82 TC 27
RANTOUL* PTSUNNY 78 67 68 SW7 29.99F HX 80 TC 26
MATTOON PTSUNNY 81 67 62 S8 30.01S HX 83 TC 27
PARIS* PTSUNNY 80 65 60 SW5 30.00F HX 81 TC 26
ILZ079-100>102-182300-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON SUNNY 84 66 54 VRB3 30.00F HX 86 TC 29
BELLEVILLE DRIZZLE 86 71 59 SW5 29.97S HX 91 TC 30
CAHOKIA* PTSUNNY 86 68 54 CALM 29.98F HX 89 TC 30
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-182300-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE SUNNY 88 66 48 CALM 29.99F HX 90 TC 31
CAIRO* SUNNY 89 69 52 CALM 30.00S HX 93 TC 32
EFFINGHAM* PTSUNNY 82 69 64 SW3 30.03S HX 85 TC 28
MT. VERNON SUNNY 86 67 52 SW6 30.01R HX 89 TC 30
CENTRALIA* MOSUNNY 85 68 56 CALM 30.01R HX 88 TC 29
SALEM* N/A 84 70 62 MISG 30.01S HX 88 TC 29
METROPOLIS* SUNNY 87 64 45 CALM 30.01S HX 88 TC 31
ILZ067-068-072-073-078-083-087-091-182300-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE SUNNY 85 62 46 CALM 30.00R HX 85 TC 29
FLORA* MOSUNNY 84 68 58 W5 30.01S HX 87 TC 29
FAIRFIELD* SUNNY 85 64 49 S5 30.00S HX 86 TC 29
HARRISBURG* SUNNY 87 67 50 SW3 30.00S HX 89 TC 31
ROBINSON* MOSUNNY 82 66 57 NW5 30.00R HX 85 TC 28
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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