080
ASUS43 KLOT 200810
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
300 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.
ILZ001-002-007-009-015-016-024-200900-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLEAR 68 66 93 E7 29.96R TC 20
STERLING* PTCLDY 64 62 93 NE5 29.99R TC 18
SAVANNA* MOCLDY 64 62 90 N3 29.99S TC 18
ILZ003-004-008-010-011-017-018-200900-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD PTCLDY 63 58 83 N3 30.01R TC 17
FREEPORT* PTCLDY 61 60 95 CALM 30.01S TC 16
ROCHELLE* MOCLDY 62 60 94 CALM 29.99S TC 17
PERU* PTCLDY 66 63 88 NE3 29.97S TC 19
ILZ005-006-012>014-019>023-200900-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE MOCLDY 67 57 70 N6 29.96R TC 19
CHICAGO-MIDWAY CLOUDY 69 56 62 NE5 29.96R TC 21
AURORA MOCLDY 64 59 83 CALM 29.98R TC 18
JOLIET* MOCLDY 69 58 68 N5 29.97R TC 21
WAUKEGAN PTCLDY 60 58 92 N3 29.97S TC 16
DUPAGE AIRPORT MOCLDY 63 58 83 N5 29.97R TC 17
WHEELING PTCLDY 64 58 80 N5 29.98S TC 18
LANSING* CLOUDY 69 54 57 NE5 29.97R TC 21
NORTHERLY ISL* N/A 71 56 58 NE10 N/A TC 22
LMZ740>746-200900-
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 70 74 330/ 6/ 8 1014.7 2/ 4
WAUKEGAN HARBOR 70 74 300/ 6/ 8 1015.5 2/ 3
WILMETTE BUOY 73 70/ 12/ 17 1017.3S 2/ 4
CHICAGO BUOY 74 73 1013.6 2/ 4
NORTHERLY ISL 71 40/ 10/ 13 N/A
CALUMET HARBOR 72 1014.5R
MICH CITY BUOY 73 74 30/ 12/ 16 N/A 3/ 4
ST. JOSEPH BUOY 72 74 30/ 10/ 14 1015.2R 2/ 3
ILZ025>027-034>036-040-047-049-050-058-095>099-200900-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY FOG 64 64 100 N6 29.95S VSB 1/2 TC 18
MACOMB* PTCLDY 65 65 100 N3 29.98R TC 18
ILZ028>032-037-038-041>044-048-051>054-059>061-200900-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC MOCLDY 66 66 100 NE3 29.96S TC 19
BLOOMINGTON CLOUDY 68 68 100 NE8 29.96S TC 20
DECATUR LGT RAIN 68 67 96 VRB5 29.95R TC 20
PEORIA MOCLDY 69 67 93 NE7 29.95R TC 21
LACON* MOCLDY 66 64 93 CALM 29.96R TC 19
LINCOLN* LGT RAIN 68 68 100 N3 29.95R TC 20
SPRINGFIELD LGT RAIN 68 67 96 CALM 29.94S TC 20
TAYLORVILLE NOT AVBL
ILZ033-039-045-046-055>057-062-063-200900-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLOUDY 68 68 100 N7 29.93S TC 20
RANTOUL* MOCLDY 69 69 99 N6 29.93F TC 21
MATTOON MOCLDY 68 66 93 SE3 29.91F TC 20
PARIS* CLOUDY 65 64 97 CALM 29.92F TC 19
ILZ079-100>102-200900-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON MOCLDY N/A N/A N/A CALM 29.92S FOG
CAHOKIA* MOCLDY 72 71 97 CALM 29.90F TC 22
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-200900-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE NOT AVBL
EFFINGHAM* MOCLDY 69 69 99 CALM 29.93S TC 21
MARION CLEAR 71 71 98 S6 29.90F TC 22
MT. VERNON MOCLDY 72 72 100 NE8 29.92S TC 22
CENTRALIA* CLOUDY 74 73 98 CALM 29.91S TC 23
SALEM* MOCLDY 74 73 99 MISG 29.90F TC 23
METROPOLIS* HVY RAIN 70 70 98 SW8 29.94R TC 21
ILZ067-068-072-073-078-083-087-091-200900-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE LGT RAIN 70 68 93 E9 29.91F TC 21
FAIRFIELD* CLOUDY 73 70 90 CALM 29.92F THUNDER TC 23
HARRISBURG* CLEAR 72 72 98 CALM 29.91F TC 22
ROBINSON* MOCLDY 70 68 94 E6 29.90F TC 21
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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