328
ASUS43 KLOT 201401
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
900 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.
ILZ001-002-007-009-015-016-024-201500-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE SUNNY 71 62 73 E5 30.05R TC 22
STERLING* SUNNY 71 61 70 E5 30.07R TC 22
SAVANNA* MOSUNNY 69 59 70 CALM 30.07R TC 21
ILZ003-004-008-010-011-017-018-201500-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD SUNNY 70 57 63 N3 30.08R TC 21
FREEPORT* SUNNY 65 64 95 CALM 30.09R TC 19
ILZ005-006-012>014-019>023-201500-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE SUNNY 71 57 61 N8 30.03R TC 22
CHICAGO-MIDWAY SUNNY 73 56 54 N9 30.03R TC 23
AURORA SUNNY 69 59 70 NE7 30.05R TC 21
JOLIET* SUNNY 73 58 60 N6 30.05R TC 23
WAUKEGAN SUNNY 70 60 70 N7 30.03R TC 21
DUPAGE AIRPORT SUNNY 69 59 70 N8 30.04R TC 21
WHEELING MOSUNNY 70 58 65 N6 30.05R TC 21
LANSING* SUNNY 73 56 53 N5 30.03R TC 23
NORTHERLY ISL* N/A 74 58 57 N9 N/A TC 23
LMZ740>746-201500-
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 71 74 340/ 12/ 16 1016.6R 2/ 3
WAUKEGAN HARBOR 71 74 320/ 10/ 14 1017.5R 1/ 4
WILMETTE BUOY 72 50/ 12/ 17 1019.8R 2/ 4
CHICAGO BUOY 72 73 1015.8R 2/ 4
NORTHERLY ISL 72 10/ 8/ 10 N/A
CALUMET HARBOR 72 360/ 7/ 12 1016.7
MICH CITY BUOY 72 74 30/ 6/ 10 N/A 2/ 4
ST. JOSEPH BUOY 70 74 50/ 6/ 8 1016.9R 1/ 4
ILZ025>027-034>036-040-047-049-050-058-095>099-201500-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY MOSUNNY 69 67 93 E5 30.04R TC 21
MACOMB* SUNNY 71 69 95 E6 30.07R TC 21
ILZ028>032-037-038-041>044-048-051>054-059>061-201500-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON SUNNY 71 63 75 NE9 30.05R TC 22
DECATUR CLOUDY 70 69 97 NE5 30.03R TC 21
PEORIA SUNNY 72 61 68 NE9 30.04R TC 22
LACON* SUNNY 69 60 73 NE3 30.05R TC 21
LINCOLN* SUNNY 73 67 82 NE7 30.03R TC 23
SPRINGFIELD CLOUDY 69 68 96 N3 30.03R FOG TC 21
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-201500-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLOUDY 70 68 93 NE5 30.03R TC 21
MATTOON MOSUNNY 73 67 81 NE8 30.00R TC 23
ILZ079-100>102-201500-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON CLOUDY 72 68 88 N7 30.02R TC 22
CAHOKIA* MOSUNNY 77 71 82 N7 29.99R TC 25
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-201500-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE CLOUDY 73 72 94 CALM 29.99S TC 23
CAIRO* CLOUDY 73 71 92 CALM 30.01R TC 23
MT. VERNON SUNNY 78 71 79 SW3 29.99R HX 80 TC 26
CENTRALIA* SUNNY 79 72 79 CALM 29.99R HX 82 TC 26
SALEM* PTSUNNY 76 73 88 MISG 29.99R TC 25
ILZ067-068-072-073-078-083-087-091-201500-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
FAIRFIELD* SUNNY 76 71 85 CALM 29.98R TC 24
HARRISBURG* CLOUDY 75 73 93 CALM 30.00R TC 24
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