148
ASUS43 KLOT 181806
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
100 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.
ILZ001-002-007-009-015-016-024-181900-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE PTSUNNY 75 68 78 SW5 29.98F TC 24
6HR MIN TEMP: 66; 6HR MAX TEMP: 75; 6HR PCP: TRACE;
STERLING* PTSUNNY 76 69 79 SW8 30.00F TC 24
SAVANNA* CLOUDY 78 67 67 SW8G16 29.98F HX 80 TC 26
ILZ003-004-008-010-011-017-018-181900-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 77 67 71 SW10 29.99F TC 25
6HR MIN TEMP: 63; 6HR MAX TEMP: 79;
FREEPORT* CLOUDY 74 70 89 W7 30.00F TC 23
ROCHELLE* PTSUNNY 74 66 74 SW8 30.00F TC 24
DE KALB* PTSUNNY 73 67 80 SW8 30.01F TC 23
PERU* CLOUDY 75 66 73 SW7 30.02F TC 24
ILZ005-006-012>014-019>023-181900-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE CLOUDY 79 63 57 SW12 29.98S HX 80 TC 26
6HR MIN TEMP: 67; 6HR MAX TEMP: 81;
CHICAGO-MIDWAY PTSUNNY 79 64 60 SW15 29.99F HX 81 TC 26
6HR MIN TEMP: 67; 6HR MAX TEMP: 81;
AURORA PTSUNNY 76 67 73 SW10 30.00F TC 24
6HR MIN TEMP: 64; 6HR MAX TEMP: 78;
JOLIET* PTSUNNY 80 67 63 W9 30.02R HX 83 TC 27
WAUKEGAN PTSUNNY 78 66 66 SW8 29.96F HX 80 TC 26
6HR MIN TEMP: 64; 6HR MAX TEMP: 79;
DUPAGE AIRPORT PTSUNNY 77 67 71 SW12 29.99F TC 25
6HR MIN TEMP: 65; 6HR MAX TEMP: 79;
KANKAKEE* PTSUNNY 79 64 60 SW8 30.03F HX 80 TC 26
WHEELING PTSUNNY 79 64 60 SW10 29.99F HX 81 TC 26
6HR MIN TEMP: 67; 6HR MAX TEMP: 80;
LANSING* PTSUNNY 80 64 58 SW10 30.01S HX 81 TC 26
NORTHERLY ISL* N/A 80 59 48 S5 N/A HX 81 TC 27
LMZ740>746-181900-
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 77 74 240/ 10/ 14 1014.6F 1
WAUKEGAN HARBOR 77 74 240/ 10/ 14 1015.5F 1
WILMETTE BUOY 77 260/ 12/ 16 1018.7F 1/ 2
CHICAGO BUOY 78 73 1014.5F 1
NORTHERLY ISL 80 190/ 6/ 13 N/A
CALUMET HARBOR 79 220/ 7/ 11 1015.7
MICH CITY BUOY 75 74 230/ 2/ 4 N/A 1/ 3
ST. JOSEPH BUOY 73 74 220/ 10/ 12 1016.9F 2/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-181900-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY PTSUNNY 78 67 68 SW9 30.03F HX 80 TC 26
GALESBURG* CLOUDY 75 68 79 SW9 30.02F TC 24
MACOMB* CLOUDY 77 70 79 SW10 30.04F TC 25
JACKSONVILLE* MOSUNNY 81 67 63 S7 30.03F HX 83 TC 27
ILZ028>032-037-038-041>044-048-051>054-059>061-181900-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC PTSUNNY 77 67 72 W9 30.04R TC 25
BLOOMINGTON PTSUNNY 79 65 62 SW15 30.06F HX 81 TC 26
DECATUR MOSUNNY 80 65 59 SW9 30.06F HX 82 TC 27
PEORIA PTSUNNY 79 67 66 SW12 30.02F HX 81 TC 26
6HR MIN TEMP: 65; 6HR MAX TEMP: 79;
LACON* CLOUDY 78 65 63 SW8 30.01F HX 80 TC 26
LINCOLN* PTSUNNY 82 67 61 SW7 30.05F HX 85 TC 28
SPRINGFIELD PTSUNNY 81 66 60 SW6G16 30.05F HX 83 TC 27
6HR MIN TEMP: 64; 6HR MAX TEMP: 82;
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-181900-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN PTSUNNY 79 67 66 SW8 30.06F HX 81 TC 26
RANTOUL* PTSUNNY 77 67 71 W10G16 30.06F TC 25
MATTOON MOSUNNY 79 65 62 S5 30.06F HX 81 TC 26
PARIS* MOSUNNY 81 63 53 CALM 30.06F HX 82 TC 27
ILZ079-100>102-181900-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON SUNNY 84 66 54 SW7 30.06F HX 86 TC 29
BELLEVILLE MOSUNNY 84 71 63 CALM 30.03F HX 89 TC 29
CAHOKIA* MOSUNNY 84 67 56 VRB5 30.05F HX 86 TC 29
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181900-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE MOSUNNY 84 66 54 VRB5 30.06F HX 86 TC 29
CAIRO* SUNNY 85 68 56 CALM 30.06F HX 89 TC 30
EFFINGHAM* MOSUNNY 82 66 57 SW3 30.08F HX 84 TC 28
MT. VERNON MOSUNNY 83 64 52 W3 30.06F HX 84 TC 28
CENTRALIA* MOSUNNY 83 65 53 CALM 30.06F HX 85 TC 28
SALEM* N/A 82 68 62 MISG 30.06F HX 84 TC 28
METROPOLIS* MOSUNNY 85 64 48 SW6 30.06F HX 86 TC 30
ILZ067-068-072-073-078-083-087-091-181900-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE SUNNY 83 59 44 SW6 30.06F HX 83 TC 28
FLORA* SUNNY 82 63 51 SW5 30.07F HX 83 TC 28
FAIRFIELD* SUNNY 82 62 50 SW3 30.06F HX 82 TC 28
HARRISBURG* SUNNY 83 64 52 CALM 30.07F HX 85 TC 29
ROBINSON* SUNNY 82 64 54 VRB2 30.06S HX 84 TC 28
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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