083
ASUS43 KLOT 201301
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
800 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.
ILZ001-002-007-009-015-016-024-201400-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE SUNNY 68 63 84 E5 30.04R TC 20
STERLING* SUNNY 66 63 90 CALM 30.05R TC 19
SAVANNA* SUNNY 64 60 85 CALM 30.05R TC 18
ILZ003-004-008-010-011-017-018-201400-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD SUNNY 65 59 81 N5 30.06R TC 18
FREEPORT* SUNNY 62 60 95 CALM 30.07R TC 16
DE KALB* SUNNY 64 59 84 N3 30.06R TC 18
ILZ005-006-012>014-019>023-201400-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE SUNNY 67 57 70 N7 30.02R TC 19
CHICAGO-MIDWAY SUNNY 70 56 61 N6 30.01R TC 21
AURORA SUNNY 65 59 81 NE7 30.03R TC 18
JOLIET* SUNNY 69 60 74 N5 30.03R TC 21
WAUKEGAN SUNNY 65 57 75 N6 30.02R TC 18
DUPAGE AIRPORT SUNNY 64 59 83 N5 30.03R TC 18
WHEELING MOSUNNY 66 57 72 N7 30.04R TC 19
ROMEOVILLE* SUNNY 68 64 88 N8 30.03R TC 20
LANSING* SUNNY 71 57 61 N6 30.01S TC 22
NORTHERLY ISL* N/A 72 57 59 MISG N/A TC 22
LMZ740>746-201400-
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 73 320/ 8/ 12 1016.2R 1/ 4
WAUKEGAN HARBOR 67 74 300/ 8/ 12 1016.9R 1/ 4
WILMETTE BUOY 72 70/ 12/ 16 1019.0R 2/ 4
CHICAGO BUOY 73 73 1015.3R 2/ 4
NORTHERLY ISL 71 20/ 8/ 11 N/A
CALUMET HARBOR 72 350/ 7/ 11 1016.2
MICH CITY BUOY 72 74 10/ 10/ 12 N/A 2/ 4
ST. JOSEPH BUOY 70 74 70/ 4/ 6 1016.7R 1/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-201400-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY PTSUNNY 67 66 97 NE3 30.02R TC 19
GALESBURG* SUNNY 67 66 96 NE3 30.05R TC 19
MACOMB* SUNNY 68 68 100 NE6 30.05R TC 20
ILZ028>032-037-038-041>044-048-051>054-059>061-201400-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON SUNNY 67 64 90 NE8 30.03R TC 19
DECATUR CLOUDY 70 69 97 NE6 30.01R FOG TC 21
PEORIA SUNNY 69 63 81 NE7 30.03R TC 21
LACON* SUNNY 66 60 81 CALM 30.03R TC 19
LINCOLN* SUNNY 69 69 100 NE5 30.02R TC 21
SPRINGFIELD FOG 68 67 96 NE3 30.01S VSB 1 TC 20
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-201400-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLOUDY 69 68 96 E5 30.01R FOG TC 21
MATTOON MOSUNNY 69 67 93 NE5 29.99R TC 21
ILZ079-100>102-201400-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON PTSUNNY 72 70 94 N6 30.00R TC 22
CAHOKIA* PTSUNNY 75 72 90 CALM 29.99R TC 24
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-201400-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE CLOUDY 72 72 100 S3 29.99R TC 22
CAIRO* CLOUDY 72 71 97 CALM 30.00R TC 22
EFFINGHAM* PTSUNNY 69 69 100 N3 30.01S TC 21
MT. VERNON SUNNY 75 71 87 CALM 29.98S TC 24
CENTRALIA* SUNNY 76 73 93 CALM 29.98S TC 24
SALEM* SUNNY 74 73 95 MISG 29.98R TC 24
ILZ067-068-072-073-078-083-087-091-201400-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE PTSUNNY 70 68 93 W3 29.98R TC 21
FLORA* SUNNY 72 N/A N/A CALM 29.98S TC 22
FAIRFIELD* PTSUNNY 73 71 93 CALM 29.97F TC 23
HARRISBURG* CLOUDY 72 72 99 SW6 29.99R TC 22
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