482
ASUS43 KLOT 171810
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
100 PM CDT THU SEP 17 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.
ILZ001-002-007-009-015-016-024-171900-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE MOSUNNY 82 73 74 CALM 30.18F HX 87 TC 28
6HR MIN TEMP: 68; 6HR MAX TEMP: 82;
STERLING* CLOUDY 82 73 74 CALM 30.19F HX 87 TC 28
SAVANNA* CLOUDY 75 71 87 N3 30.21S TC 24
ILZ003-004-008-010-011-017-018-171900-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 73 70 90 N8 30.22S TC 23
6HR MIN TEMP: 64; 6HR MAX TEMP: 75; 6HR PCP: 0.16;
FREEPORT* CLOUDY 72 70 95 N6 30.23F TC 22
ROCHELLE* CLOUDY 80 73 78 SW6 30.20S HX 84 TC 27
DE KALB* CLOUDY 79 73 80 SW5 30.21S HX 83 TC 26
PERU* MOSUNNY 84 73 70 S7 30.18F HX 91 TC 29
ILZ005-006-012>014-019>023-171900-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTSUNNY 77 71 82 NW5 30.19S TC 25
6HR MIN TEMP: 67; 6HR MAX TEMP: 78; 6HR PCP: 0.37;
CHICAGO-MIDWAY PTSUNNY 78 71 79 W5 30.18F HX 80 TC 26
6HR MIN TEMP: 69; 6HR MAX TEMP: 79;
AURORA PTSUNNY 79 73 82 SW3 30.19F HX 82 TC 26
6HR MIN TEMP: 69; 6HR MAX TEMP: 80; 6HR PCP: 0.30;
JOLIET* PTSUNNY 82 75 81 CALM 30.19S HX 88 TC 28
WAUKEGAN CLOUDY 70 69 97 CALM 30.20S FOG TC 21
6HR MIN TEMP: 64; 6HR MAX TEMP: 69; 6HR PCP: 0.10;
DUPAGE AIRPORT CLOUDY 79 71 76 CALM 30.20S HX 82 TC 26
6HR MIN TEMP: 66; 6HR MAX TEMP: 80; 6HR PCP: 0.41;
KANKAKEE* MOSUNNY 81 71 72 S3 30.20F HX 85 TC 27
WHEELING CLOUDY 72 71 97 N3 30.21F TC 22
6HR MIN TEMP: 66; 6HR MAX TEMP: 73; 6HR PCP: 0.19;
LANSING* PTSUNNY 79 71 77 S3 30.19F HX 81 TC 26
NORTHERLY ISL* N/A 75 68 78 N5 N/A TC 24
LMZ740>746-171900-
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 62 60 260/ 2/ 4 1023.6 1/ 5
WAUKEGAN HARBOR 66 65 50/ 4/ 6 1022.3 1
WILMETTE BUOY 65 40/ 4/ 6 1024.9 1
CHICAGO BUOY 71 68 1021.6 1/ 4
NORTHERLY ISL 77 270/ 4/ 8 N/A
CALUMET HARBOR 76 210/ 2/ 5 1022.4
MICH CITY BUOY 68 65 220/ 4/ 6 N/A 1/ 4
ST. JOSEPH BUOY 65 62 260/ 6/ 6 1023.7 1/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-171900-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY SUNNY 89 72 56 VRB5 30.19F HX 96 TC 32
GALESBURG* MOSUNNY 84 76 76 SW5 30.20F HX 93 TC 29
MACOMB* SUNNY 88 78 70 SW3 30.21F HX 101 TC 31
JACKSONVILLE* SUNNY 94 72 48 W7 30.19F HX 101 TC 34
PITTSFIELD* MOSUNNY 94 71 47 W8 30.20F HX 100 TC 34
ILZ028>032-037-038-041>044-048-051>054-059>061-171900-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC MOSUNNY 88 74 62 S8 30.19F HX 96 TC 31
BLOOMINGTON SUNNY 86 74 67 S7 30.22F HX 94 TC 30
DECATUR SUNNY 91 72 53 N7 30.21F HX 98 TC 33
PEORIA SUNNY 86 74 67 S7 30.18F HX 94 TC 30
6HR MIN TEMP: 72; 6HR MAX TEMP: 86;
LACON* SUNNY 84 72 67 S5 30.18F HX 89 TC 29
SPRINGFIELD SUNNY 93 72 50 NW5 30.19F HX 101 TC 34
6HR MIN TEMP: 74; 6HR MAX TEMP: 93;
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-171900-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN SUNNY 87 72 60 VRB5 30.22F HX 93 TC 31
RANTOUL* SUNNY 86 70 59 S8 30.22F HX 91 TC 30
MATTOON MOSUNNY 95 69 42 VRB5 30.19F HX 100 TC 35
PARIS* SUNNY 89 70 53 E6 30.22F HX 94 TC 32
ILZ079-100>102-171900-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON SUNNY 93 72 49 SW7 30.20F HX 100 TC 34
BELLEVILLE MOSUNNY 95 74 51 SW7 30.19F HX 105 TC 35
CAHOKIA* MOSUNNY 94 73 50 S6 30.20F HX 103 TC 34
SPARTA* PTSUNNY 93 67 42 W3 30.24S HX 97 TC 34
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-171900-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE SUNNY 97 68 38 SW6 30.23F HX 101 TC 36
CAIRO* SUNNY 98 69 39 W7 30.24F HX 104 TC 37
EFFINGHAM* SUNNY 95 65 36 SW12 30.22F HX 97 TC 35
MT. VERNON PTSUNNY 95 70 44 SW12 30.23F HX 101 TC 35
CENTRALIA* MOSUNNY 95 67 39 W8 30.22F HX 99 TC 35
SALEM* MOSUNNY 98 69 38 MISG 30.22F HX 104 TC 37
METROPOLIS* SUNNY 95 67 38 W6 30.25F HX 99 TC 35
ILZ067-068-072-073-078-083-087-091-171900-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE SUNNY 95 68 41 W13 30.21F HX 99 TC 35
FLORA* MOSUNNY 95 70 43 SW10 30.22F HX 101 TC 35
FAIRFIELD* PTSUNNY 94 66 39 SW8 30.23S HX 96 TC 34
ROBINSON* SUNNY 99 70 39 W13G20 30.19F HX 105 TC 37
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page