555
ASUS43 KLOT 201001
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 AM CDT THU AUG 20 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.
ILZ001-002-007-009-015-016-024-201100-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLEAR 66 65 96 NE5 29.99R TC 19
STERLING* CLEAR 63 61 93 E6 30.01R TC 17
SAVANNA* MOCLDY 63 60 92 CALM 30.02R TC 17
ILZ003-004-008-010-011-017-018-201100-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD PTCLDY 57 56 96 N3 30.02F TC 14
FREEPORT* N/A 57 56 95 CALM 30.04S TC 14
ILZ005-006-012>014-019>023-201100-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTCLDY 63 57 81 N8 29.97F TC 17
CHICAGO-MIDWAY PTCLDY 68 56 65 N6 29.97S TC 20
AURORA CLEAR 59 58 96 CALM 29.98F TC 15
JOLIET* PTCLDY 64 59 84 CALM 29.98R TC 18
WAUKEGAN CLEAR 57 56 96 NW5 29.99S TC 14
DUPAGE AIRPORT CLEAR 61 58 90 N6 29.99S TC 16
WHEELING PTCLDY 61 57 87 N5 30.00S TC 16
LANSING* PTCLDY 67 55 64 N5 29.97R TC 20
NORTHERLY ISL* N/A 70 54 56 N9 N/A TC 21
LMZ740>746-201100-
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 68 74 300/ 6/ 10 1015.2S 2/ 4
WAUKEGAN HARBOR 68 74 300/ 8/ 12 1015.9F 2/ 3
WILMETTE BUOY 72 60/ 12/ 16 1018.0R 2/ 3
CHICAGO BUOY 73 73 1013.7F 2/ 4
NORTHERLY ISL 70 20/ 7/ 11 N/A
CALUMET HARBOR 72 360/ 9/ 12 1014.8
MICH CITY BUOY 72 74 20/ 12/ 16 N/A 2/ 4
ST. JOSEPH BUOY 69 74 40/ 8/ 12 1015.2F 2/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-201100-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY CLEAR 64 64 100 N7 29.97S FOG TC 18
MACOMB* FOG 63 63 100 N5 30.00S VSB 1/4 TC 17
ILZ028>032-037-038-041>044-048-051>054-059>061-201100-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON PTCLDY 65 65 100 NE5 29.99R TC 18
DECATUR MOCLDY 68 67 96 N5 29.96R TC 20
PEORIA CLEAR 67 65 93 NE3 29.97S TC 19
LACON* CLEAR 64 62 92 CALM 29.98S TC 18
LINCOLN* CLEAR 68 68 100 CALM 29.97R FOG TC 20
SPRINGFIELD LGT RAIN 67 66 97 N6 29.95S TC 19
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-201100-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN MOCLDY 68 68 100 N5 29.94F TC 20
MATTOON LGT RAIN 67 67 100 CALM 29.93S TC 19
ILZ079-100>102-201100-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON CLOUDY 72 71 95 N3 29.94R TC 22
CAHOKIA* CLEAR 71 71 100 N5 29.92R TC 22
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-201100-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE NOT AVBL
CAIRO* CLOUDY 72 72 99 CALM 29.91 TC 22
MARION MOCLDY 69 68 98 CALM 29.92R TC 20
MT. VERNON MOCLDY 70 70 100 CALM 29.92S FOG TC 21
CENTRALIA* MOCLDY 71 71 98 CALM 29.93R FOG TC 22
SALEM* MOCLDY 72 72 100 MISG 29.93R FOG TC 22
ILZ067-068-072-073-078-083-087-091-201100-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE MOCLDY 69 67 93 SE5 29.91F TC 21
FAIRFIELD* MOCLDY 71 68 90 CALM 29.92R TC 22
HARRISBURG* MOCLDY 71 71 99 CALM 29.91S TC 22
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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