785
ASUS43 KLOT 172001
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
300 PM CDT MON AUG 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.
ILZ001-002-007-009-015-016-024-172100-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE PTSUNNY 82 63 52 NW12 30.06S HX 83 TC 28
STERLING* MOSUNNY 82 59 45 N7 30.07S HX 82 TC 28
SAVANNA* MOSUNNY 80 57 44 N3 30.06F HX 80 TC 27
ILZ003-004-008-010-011-017-018-172100-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD MOSUNNY 81 58 45 NW10 30.06F HX 81 TC 27
FREEPORT* PTSUNNY 80 62 53 NW6 30.08S HX 81 TC 27
ILZ005-006-012>014-019>023-172100-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTSUNNY 77 62 59 N10 30.02S TC 25
CHICAGO-MIDWAY PTSUNNY 76 63 64 NE9 30.02S TC 24
AURORA SUNNY 79 60 52 N13 30.03F HX 80 TC 26
JOLIET* MOSUNNY 82 62 51 NW7 30.03S HX 83 TC 28
WAUKEGAN PTSUNNY 76 65 68 NE6 30.02F TC 24
DUPAGE AIRPORT MOSUNNY 80 59 48 N10 30.03S HX 81 TC 27
WHEELING SUNNY 77 62 59 E6 30.04F TC 25
ROMEOVILLE* MOSUNNY 79 63 57 NW3 30.03F HX 80 TC 26
LANSING* MOSUNNY 77 61 58 NE6 30.03F TC 25
NORTHERLY ISL* N/A 76 64 66 NE6 N/A TC 24
LMZ740>746-172100-
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 72 75 70/ 6/ 8 1016.6F 1/ 4
WAUKEGAN HARBOR 72 75 50/ 6/ 8 1017.6F 2/ 5
WILMETTE BUOY 72 70/ 6/ 10 1020.5F 2/ 4
CHICAGO BUOY 73 74 1016.1F 2/ 5
HARRISON CRIB 72 30/ 10/ 11 N/A
NORTHERLY ISL 75 10/ 7/ 10 N/A
CALUMET HARBOR 74 10/ 9/ 12 1017.1
MICHIGAN CITY 74 10/ 9/ 11 1015.5F
MICH CITY BUOY 71 74 360/ 10/ 16 N/A 3/ 5
ST. JOSEPH BUOY 71 75 360/ 10/ 14 1017.6F 3/ 5
ILZ025>027-034>036-040-047-049-050-058-095>099-172100-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY MOSUNNY 80 62 54 NW6 30.09F HX 81 TC 27
MACOMB* SUNNY 80 66 60 NW7 30.10S HX 82 TC 27
ILZ028>032-037-038-041>044-048-051>054-059>061-172100-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON MOSUNNY 80 63 55 N16 30.07S HX 81 TC 27
DECATUR PTSUNNY 80 62 54 N15 30.06S HX 81 TC 27
PEORIA MOSUNNY 80 61 52 NW10G20 30.06S HX 81 TC 27
LACON* SUNNY 78 58 51 NW7 30.05S TC 25
LINCOLN* PTSUNNY 81 64 56 N7 30.06S HX 82 TC 27
SPRINGFIELD MOSUNNY 81 64 56 N8 30.07S HX 82 TC 27
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-172100-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN MOSUNNY 80 68 66 NW12 30.04S HX 83 TC 27
MATTOON MOSUNNY 80 65 59 NW13 30.03F HX 82 TC 27
ILZ079-100>102-172100-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON MOSUNNY 81 64 57 NW8 30.09S HX 82 TC 27
BELLEVILLE MOSUNNY 84 69 61 NW10 30.04F HX 88 TC 29
CAHOKIA* PTSUNNY 82 66 58 N13 30.06F HX 84 TC 28
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-172100-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE PTSUNNY 84 70 61 NW14 30.04F HX 88 TC 29
CAIRO* PTSUNNY 86 74 68 N9G16 30.03F HX 94 TC 30
MT. VERNON PTSUNNY 82 65 56 VRB5 30.05S HX 84 TC 28
CENTRALIA* MOSUNNY 82 65 56 N10G16 30.06S HX 84 TC 28
SALEM* N/A 82 69 65 MISG 30.06S HX 85 TC 28
ILZ067-068-072-073-078-083-087-091-172100-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE MOSUNNY 85 68 56 NW15 30.00S HX 88 TC 29
FAIRFIELD* PTSUNNY 82 66 58 NW8 30.03S HX 84 TC 28
HARRISBURG* PTSUNNY 86 72 62 NW10G21 30.03S HX 92 TC 30
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