298
ASUS43 KLOT 211012
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 AM CDT THU MAY 21 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.
ILZ001-002-007-009-015-016-024-211100-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE MOCLDY 49 35 58 NE9 30.27S TC 9
STERLING* PTCLDY 48 33 56 NE13 30.28F TC 9
SAVANNA* PTCLDY 46 35 65 NE8 30.31S TC 8
ILZ003-004-008-010-011-017-018-211100-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD MOCLDY 46 32 58 N6 30.32S TC 8
FREEPORT* PTCLDY 43 37 78 NE7 30.32F TC 6
ROCHELLE* PTCLDY 46 32 58 NE8 30.29S TC 8
DE KALB* PTCLDY 47 32 57 NE12G17 30.30S TC 8
PERU* MOCLDY 46 36 66 NE10 30.27S TC 8
ILZ005-006-012>014-019>023-211100-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE PTCLDY 48 35 60 NE10 30.30R TC 9
CHICAGO-MIDWAY MOCLDY 51 36 56 NE17G23 30.29R TC 11
AURORA PTCLDY 48 35 60 NE10 30.27R TC 9
JOLIET* CLOUDY 52 37 56 NE8 30.28R TC 11
WAUKEGAN PTCLDY 45 36 70 NE10 30.31S TC 7
DUPAGE AIRPORT PTCLDY 47 35 63 NE13 30.28R TC 8
KANKAKEE* MOCLDY 47 41 81 NE8 30.27R TC 8
WHEELING PTCLDY 47 35 63 NE9 30.31S TC 8
MORRIS* CLOUDY 50 36 57 NE5 30.27R TC 10
ROMEOVILLE* CLOUDY 52 36 54 NE15 30.28R TC 11
LANSING* PTCLDY 48 41 75 NE6 30.28R TC 9
NORTHERLY ISL* N/A 49 39 68 NE10 N/A TC 9
LMZ740>746-211100-
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 48 1023.9 3/ 4
WAUKEGAN HARBOR 47 49 350/ 16/ 19 1025.0 3/ 5
WILMETTE BUOY 49 70/ 17/ 23 1026.7R 4/ 5
CHICAGO BUOY 51 54 60/ 19/ 23 1024.1 4/ 5
HARRISON CRIB 51 50/ 21/ 22 N/A
NORTHERLY ISL 50 10/ 10/ 18 N/A
CALUMET HARBOR 51 30/ 10/ 14 1025.5
BURNS HARBOR 51 70/ 7/ 9 1025.7R
MICHIGAN CITY 48 60/ 8/ 10 1024.6R
ST. JOSEPH BUOY 50 60/ 10/ 14 1026.2R 3/ 5
ILZ025>027-034>036-040-047-049-050-058-095>099-211100-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY CLOUDY 53 41 63 E7 30.21R TC 12
GALESBURG* CLEAR 46 35 64 NE12G17 30.26F TC 8
MACOMB* PTCLDY 47 39 72 CALM 30.27R TC 9
JACKSONVILLE* CLOUDY 50 39 65 NE8 30.22S TC 10
PITTSFIELD* CLOUDY 53 41 64 NE9 30.22F TC 12
ILZ028>032-037-038-041>044-048-051>054-059>061-211100-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
PONTIAC CLEAR 45 38 77 MISG 30.26R TC 7
BLOOMINGTON PTCLDY 44 37 76 NE9 30.24S TC 7
DECATUR CLOUDY 48 41 76 MISG 30.21R TC 9
PEORIA CLEAR 46 36 68 NE6 30.24S TC 8
LACON* CLEAR 44 36 72 CALM 30.26S TC 7
LINCOLN* CLOUDY 50 38 62 NE7 30.23S TC 10
SPRINGFIELD CLOUDY 50 38 63 NE9 30.21S TC 10
TAYLORVILLE CLOUDY 48 41 76 NE8 30.20F TC 9
ILZ033-039-045-046-055>057-062-063-211100-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLOUDY 49 40 71 N12 30.21R TC 9
DANVILLE* MOCLDY 50 44 80 NE8 30.22S TC 10
RANTOUL* MOCLDY 46 37 69 NE12 30.23R TC 8
MATTOON CLOUDY 50 44 80 N10 30.17R TC 10
PARIS* CLOUDY 52 44 75 NE7 30.19R TC 11
ILZ079-100>102-211100-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON PTCLDY 53 45 75 N3 30.19S TC 12
BELLEVILLE MOCLDY 56 49 77 N7 30.14F TC 13
CAHOKIA* PTCLDY 55 47 74 N6 30.16F TC 13
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-211100-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE NOT AVBL
CAIRO* CLOUDY 62 58 88 N8 30.10R TC 17
EFFINGHAM* PTCLDY 51 46 83 NW6 30.19R TC 11
MARION CLOUDY 60 56 88 NE6 30.13R TC 15
MT. VERNON CLOUDY 57 50 77 N5 30.14R TC 14
CENTRALIA* CLOUDY 55 47 76 N7 30.16R TC 13
SALEM* PTCLDY 54 48 80 MISG 30.16R TC 12
METROPOLIS* CLOUDY 60 60 100 N5 30.09S TC 16
ILZ067-068-072-073-078-083-087-091-211100-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE CLOUDY 59 53 80 NE9 30.13S TC 15
FLORA* CLOUDY 55 48 76 N7 30.15R TC 13
FAIRFIELD* CLOUDY 58 50 77 N7 30.13R TC 14
HARRISBURG* CLOUDY 60 57 91 NE8 30.12R TC 16
ROBINSON* CLOUDY 55 52 88 N8 30.14R TC 13
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