599
ASUS43 KLOT 200810
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
300 AM CDT WED MAY 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 PTCLDY 50 41 71 NW9 30.21R TC 10
STERLING* PTCLDY 50 45 83 NW7 30.21R TC 10
SAVANNA* PTCLDY 49 42 78 NW7 30.21R TC 9
ILZ003-004-008-010-011-017-018-200900-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD PTCLDY 48 43 82 N6 30.20R TC 9
FREEPORT* PTCLDY 48 46 90 NW6 30.21R TC 9
ROCHELLE* PTCLDY 47 43 84 N5 30.19R TC 9
DE KALB* PTCLDY 49 44 81 N7 30.19R TC 10
PERU* CLOUDY 54 46 76 NW6 30.19R TC 12
ILZ005-006-012>014-019>023-200900-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE MOCLDY 55 43 63 N12 30.15R TC 13
CHICAGO-MIDWAY CLOUDY 59 47 64 N13 30.14R TC 15
AURORA CLOUDY 52 46 80 N12 30.16R TC 11
JOLIET* MOCLDY 57 49 72 N6 30.16R TC 14
WAUKEGAN CLEAR 50 45 83 NW3 30.15R TC 10
DUPAGE AIRPORT CLOUDY 54 45 71 N13 30.16R TC 12
KANKAKEE* PTCLDY 57 49 74 NW9G16 30.14R TC 14
WHEELING MOCLDY 54 42 64 N12G21 30.17R TC 12
MORRIS* MOCLDY 54 46 76 N5 30.16R TC 12
ROMEOVILLE* CLOUDY 55 48 76 NW10 30.16R TC 13
LANSING* CLOUDY 58 48 69 N12G17 30.15R TC 14
NORTHERLY ISL* N/A 56 46 69 N14 N/A TC 13
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 48 1019.2 1/ 2
WAUKEGAN HARBOR 53 51 310/ 6/ 8 1020.6 1
WILMETTE BUOY 54 30/ 16/ 19 1021.8R 2/ 3
CHICAGO BUOY 55 53 360/ 16/ 19 1019.6 2/ 3
HARRISON CRIB 56 340/ 19/ 21 N/A
NORTHERLY ISL 57 360/ 10/ 15 N/A
CALUMET HARBOR 57 340/ 11/ 14 1020.4R
BURNS HARBOR 56 20/ 7/ 8 1020.7S
MICHIGAN CITY 56 10/ 7/ 8 1019.6R
ST. JOSEPH BUOY 53 330/ 10/ 12 1021.1R 1/ 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 CLOUDY 51 46 83 N10 30.22 TC 11
GALESBURG* MOCLDY 49 43 81 NW6 30.23R TC 9
MACOMB* CLOUDY 52 48 86 N10G16 30.24S TC 11
JACKSONVILLE* CLOUDY 54 47 77 N13 30.18S TC 12
PITTSFIELD* CLOUDY 54 48 78 N8 30.20F TC 12
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 55 49 82 MISG 30.16S TC 13
BLOOMINGTON MOCLDY 54 48 80 N15 30.17R TC 12
DECATUR MOCLDY 56 49 77 MISG 30.15R TC 13
PEORIA MOCLDY 53 46 77 NW8 30.19S TC 12
LACON* CLOUDY 53 45 73 N9 30.19R TC 12
LINCOLN* MOCLDY 56 48 76 N7 30.18R TC 13
SPRINGFIELD MOCLDY 55 47 74 N8G17 30.17R TC 13
TAYLORVILLE MOCLDY 55 52 88 N9 30.17R TC 13
ILZ033-039-045-046-055>057-062-063-200900-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLOUDY 57 51 80 NW15G22 30.14R TC 14
DANVILLE* PTCLDY 58 53 84 NW7 30.13R TC 15
RANTOUL* MOCLDY 56 50 80 N9 30.15R TC 13
MATTOON MOCLDY 59 53 80 N9 30.13S TC 15
PARIS* CLOUDY 60 54 80 N5 30.13R TC 15
ILZ079-100>102-200900-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON CLOUDY 58 53 81 N5 30.16F TC 15
BELLEVILLE CLOUDY 61 56 82 N10 30.13R TC 16
CAHOKIA* MOCLDY 60 53 77 N7 30.15S TC 16
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
CAIRO* CLOUDY 71 70 98 NW6 30.07R TC 22
EFFINGHAM* CLOUDY 61 56 85 NW9 30.14S TC 16
MT. VERNON LGT RAIN 64 60 87 VRB3 30.13R TC 18
CENTRALIA* CLOUDY 63 57 81 CALM 30.14R TC 17
SALEM* CLOUDY 63 59 87 MISG 30.13S TC 17
METROPOLIS* CLOUDY 69 69 100 N3 30.07R 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 66 63 90 N10 30.10R TC 19
FLORA* MOCLDY 64 59 82 N12 30.12R TC 18
FAIRFIELD* RAIN 65 62 90 CALM 30.12R TC 18
HARRISBURG* CLOUDY 69 66 89 N8 30.09S TC 21
ROBINSON* CLOUDY 64 61 88 N8 30.10R TC 18
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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