111
ASUS43 KLOT 180901
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 AM CDT MON MAY 18 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.
ILZ001-002-007-009-015-016-024-181000-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLOUDY 70 64 81 W16G32 29.76R THUNDER TC 21
STERLING* MOCLDY 74 64 71 S10 29.77F TC 23
SAVANNA* TSTM 71 64 78 W9 29.77R TC 22
ILZ003-004-008-010-011-017-018-181000-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 73 62 68 S14G25 29.78F TC 23
FREEPORT* MOCLDY 73 66 80 S16G22 29.77F TC 23
DE KALB* MOCLDY 70 61 74 S15G21 29.82F TC 21
PERU* CLOUDY 73 63 68 S14G21 29.82F TC 23
ILZ005-006-012>014-019>023-181000-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE MOCLDY 74 57 55 S12G28 29.82F TC 23
CHICAGO-MIDWAY PTCLDY 75 58 55 S20G28 29.83F TC 24
AURORA MOCLDY 71 59 65 S10 29.81F TC 22
JOLIET* MOCLDY 75 59 57 S13G18 29.85F TC 24
WAUKEGAN PTCLDY 75 60 59 S20G28 29.79F TC 24
DUPAGE AIRPORT PTCLDY 72 59 63 S16G25 29.82F TC 22
KANKAKEE* CLEAR 71 58 64 S8 29.89S TC 21
WHEELING PTCLDY 75 59 57 S16G26 29.82F TC 24
MORRIS* MOCLDY 72 57 60 S10 29.84S TC 22
LANSING* CLEAR 71 58 61 S13G20 29.88S TC 22
NORTHERLY ISL* N/A 75 56 51 S14 N/A TC 24
LMZ740>746-181000-
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 49 1015.3R 2/ 4
WAUKEGAN HARBOR 64 51 170/ 10/ 17 1010.4F 2/ 3
HARRISON CRIB 76 210/ 26/ 30 N/A
NORTHERLY ISL 76 190/ 17/ 19 N/A
CALUMET HARBOR 75 170/ 12/ 15 1011.1
BURNS HARBOR 73 180/ 8/ 11 1012.2F
MICHIGAN CITY 73 160/ 15/ 19 1010.2F
ST. JOSEPH BUOY 65 180/ 12/ 16 1012.8F 2/ 3
ILZ025>027-034>036-040-047-049-050-058-095>099-181000-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY CLOUDY 75 67 76 S10 29.80R TC 24
GALESBURG* LGT RAIN 72 64 76 S10G16 29.79F TC 22
MACOMB* CLOUDY 76 68 77 S15 29.82F TC 24
JACKSONVILLE* CLOUDY 73 65 74 S12G17 29.83S TC 23
ILZ028>032-037-038-041>044-048-051>054-059>061-181000-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON CLEAR 71 61 70 S20 29.87S TC 22
DECATUR N/A N/A N/A N/A MISG 29.89F
PEORIA PTCLDY 74 63 68 S15 29.82S TC 23
SPRINGFIELD CLEAR 74 62 66 S18G28 29.85S TC 23
TAYLORVILLE CLEAR 72 63 73 S17G24 29.88F TC 22
ILZ033-039-045-046-055>057-062-063-181000-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN CLEAR 71 60 68 S20G29 29.91F TC 22
DANVILLE* CLEAR 73 59 62 S16G23 29.93F TC 23
MATTOON PTCLDY 72 60 66 S12 29.93F TC 22
PARIS* MOCLDY 69 59 69 S12 29.96F TC 21
ILZ079-100>102-181000-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON CLEAR 75 65 71 S13 29.89S TC 24
BELLEVILLE PTCLDY 74 67 78 S8 29.89S TC 24
CAHOKIA* PTCLDY 75 66 73 S8 29.88S TC 24
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181000-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE CLEAR 76 64 66 S12 29.94S TC 24
CAIRO* PTCLDY 78 65 64 S12G21 29.98S HX 80 TC 26
EFFINGHAM* CLEAR 72 60 67 SE8 29.96F TC 22
MARION CLEAR 74 60 62 S9 29.97S TC 23
MT. VERNON CLEAR 72 61 68 S7 29.95F TC 22
CENTRALIA* CLEAR 74 62 66 S10 29.93F TC 23
SALEM* PTCLDY 73 62 67 SE6 29.94S TC 23
ILZ067-068-072-073-078-083-087-091-181000-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE CLOUDY 68 63 84 S7 29.98S TC 20
FLORA* CLEAR 70 61 73 S9 29.96F TC 21
FAIRFIELD* PTCLDY 72 59 64 S7 29.97S TC 22
HARRISBURG* PTCLDY 75 62 63 S8 29.98R 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