Regional Weather Roundup
Issued by NWS
Issued by NWS
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ASUS43 KLOT 121501
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1000 AM CDT SAT SEP 12 2026
NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.
* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
REPORT WEATHER SUCH AS PRECIPITATION OR FOG.
ILZ001-002-007-009-015-016-024-121600-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE MOSUNNY 78 70 76 SW8 29.85S HX 80 TC 26
STERLING* SUNNY 79 70 74 SW6 29.86F HX 82 TC 26
SAVANNA* MOSUNNY 75 67 77 SW7 29.86R TC 24
$$
ILZ003-004-008-010-011-017-018-121600-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD MOSUNNY 78 68 71 SW8 29.86F HX 80 TC 26
FREEPORT* MOSUNNY 76 73 90 SW10 29.88R TC 25
$$
ILZ005-006-012>014-019>023-121600-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE MOSUNNY 79 67 66 SW8 29.86F HX 81 TC 26
CHICAGO-MIDWAY MOSUNNY 78 68 71 SW6 29.87S HX 80 TC 26
AURORA SUNNY 76 68 76 SW7 29.87F TC 24
JOLIET* SUNNY 78 71 79 S5 29.88F HX 81 TC 26
WAUKEGAN SUNNY 78 68 71 SW12 29.84F HX 80 TC 26
DUPAGE AIRPORT SUNNY 77 68 73 SW7 29.87F TC 25
KANKAKEE* SUNNY 77 71 81 SW5 29.90F TC 25
WHEELING MOSUNNY 78 67 68 S7 29.87F HX 80 TC 26
ROMEOVILLE* SUNNY 79 77 94 SW5 29.88F HX 83 TC 26
LANSING* SUNNY 75 67 77 SW5 29.89F TC 24
NORTHERLY ISL* N/A 78 65 63 S3 N/A HX 80 TC 26
$$
LMZ740>746-121600-
SOUTHERN LAKE MICHIGAN
STATION/POSITION SKY/WX TEMP WIND PRES VSBY WAVE
AIR SEA DIR/SP/G HT/PER
(F) (DEG/KT/KT) (MB) (MI) (FT/S)
WINTHROP HARBOR 70 64 140/ 6/ 10 1011.0F 1/ 4
WAUKEGAN HARBOR 71 65 200/ 6/ 8 1011.9F 1/ 3
WILMETTE BUOY 72 200/ 4/ 4 1014.5F 1
CHICAGO BUOY 73 70 1010.4F 1
HARRISON CRIB 74 190/ 7/ 8 N/A
NORTHERLY ISL 75 230/ 5/ 7 N/A
CALUMET HARBOR 75 190/ 5/ 8 1011.8
MICHIGAN CITY 76 190/ 5/ 7 1010.4F
MICH CITY BUOY 71 69 170/ 6/ 6 N/A 0
ST. JOSEPH BUOY 69 69 170/ 4/ 6 1012.9F 1
$$
ILZ025>027-034>036-040-047-049-050-058-095>099-121600-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY SUNNY 77 70 79 W7 29.90R TC 25
GALESBURG* SUNNY 76 70 82 SW6 29.89R TC 25
MACOMB* SUNNY 77 73 88 S5 29.90S TC 25
JACKSONVILLE* SUNNY 78 70 77 SW6 29.90S HX 80 TC 25
$$
ILZ028>032-037-038-041>044-048-051>054-059>061-121600-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON SUNNY 78 72 81 W3 29.92R HX 80 TC 26
DECATUR SUNNY 79 69 71 W3 29.91S HX 81 TC 26
PEORIA SUNNY 76 69 79 S5 29.89S TC 24
LACON* SUNNY 75 67 77 S3 29.88S TC 24
LINCOLN* SUNNY 80 70 70 CALM 29.90S HX 84 TC 27
SPRINGFIELD SUNNY 79 68 69 S6 29.90R HX 81 TC 26
TAYLORVILLE NOT AVBL
$$
ILZ033-039-045-046-055>057-062-063-121600-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN MOSUNNY 78 71 79 W6 29.91S HX 80 TC 26
MATTOON CLOUDY 76 71 85 VRB3 29.91S TC 24
$$
ILZ079-100>102-121600-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON SUNNY 77 70 78 SW7 29.92S TC 25
CAHOKIA* SUNNY 79 70 74 VRB3 29.91F HX 82 TC 26
SPARTA* SUNNY 81 71 71 CALM 29.94R HX 84 TC 27
$$
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-121600-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE SUNNY 81 72 74 SW8 29.93 HX 84 TC 27
CAIRO* MOSUNNY 80 75 85 CALM 29.95R HX 84 TC 26
EFFINGHAM* PTSUNNY 77 72 83 SW3 29.94R TC 25
MT. VERNON SUNNY 80 72 76 SW7 29.93S HX 84 TC 27
CENTRALIA* SUNNY 82 70 66 W6 29.92S HX 86 TC 28
SALEM* MOSUNNY 82 72 73 MISG 29.92S HX 86 TC 28
$$
ILZ067-068-072-073-078-083-087-091-121600-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE CLOUDY 75 72 90 SW6 29.92S TC 24
FLORA* SUNNY 79 70 73 SW8 29.92S HX 81 TC 26
FAIRFIELD* CLOUDY 78 71 80 CALM 29.92S HX 80 TC 26
HARRISBURG* SUNNY 80 73 77 SW7 29.94S HX 84 TC 27
$$
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
$$