905
ASUS43 KLOT 181601
RWRIL
ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1100 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.
ILZ001-002-007-009-015-016-024-181700-
NORTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
MOLINE CLOUDY 70 63 78 VRB3 29.76R TC 21
STERLING* MOSUNNY 70 66 87 SE9G16 29.79R TC 21
SAVANNA* PTSUNNY 71 63 76 S3 29.79R TC 22
ILZ003-004-008-010-011-017-018-181700-
NORTH CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ROCKFORD CLOUDY 69 65 86 SE10 29.79F TC 21
FREEPORT* PTSUNNY 71 69 94 SE7 29.80R TC 21
DE KALB* CLOUDY 67 67 98 S10 29.80F TC 20
ILZ005-006-012>014-019>023-181700-
NORTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHICAGO-OHARE CLOUDY 76 65 68 SW15 29.83F THUNDER TC 24
CHICAGO-MIDWAY CLOUDY 77 67 71 SW9 29.83F THUNDER TC 25
AURORA TSTM 67 66 97 CALM 29.82F FOG TC 19
JOLIET* RAIN 70 69 98 W8G20 29.87R TC 21
WAUKEGAN CLOUDY 75 66 73 SW16 29.82S TC 24
DUPAGE AIRPORT TSTM 69 68 96 SW17G31 29.86R VSB 1 TC 21
KANKAKEE* HVY RAIN 68 65 91 W29G58 29.94R VSB 1 TC 20
WHEELING LGT RAIN 75 66 73 SW12 29.83F TC 24
MORRIS* TSTM 68 64 88 NW12G22 29.86R TC 20
ROMEOVILLE* TSTM 72 70 94 SW17G35 29.88R FOG TC 22
LANSING* CLOUDY 80 67 64 S15G24 29.85F HX 82 TC 26
NORTHERLY ISL* N/A 77 64 64 S3 N/A TC 25
LMZ740>746-181700-
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 1017.9F 2/ 3
WAUKEGAN HARBOR 66 51 210/ 12/ 17 1011.1R 2/ 3
WILMETTE BUOY 68 200/ 14/ 19 1012.3F 1/ 3
CHICAGO BUOY 66 54 200/ 6/ 10 1009.5F 1/ 3
HARRISON CRIB 75 200/ 18/ 20 N/A
NORTHERLY ISL 76 190/ 11/ 19 N/A
CALUMET HARBOR 78 180/ 6/ 10 1011.0F
BURNS HARBOR 79 200/ 12/ 17 1011.9F
MICHIGAN CITY 81 180/ 17/ 24 1009.8F
ST. JOSEPH BUOY 65 190/ 10/ 14 1012.6F 2/ 3
ILZ025>027-034>036-040-047-049-050-058-095>099-181700-
WEST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
QUINCY RAIN 64 62 93 S13 29.92R TC 18
GALESBURG* CLOUDY 68 62 80 S10G17 29.80R TC 20
MACOMB* CLOUDY 68 64 85 S30G36 29.79R TC 20
JACKSONVILLE* CLOUDY 64 64 100 CALM 29.95R TC 18
ILZ028>032-037-038-041>044-048-051>054-059>061-181700-
CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
BLOOMINGTON LGT RAIN 66 66 100 SE5 29.94F TC 19
DECATUR PTSUNNY 65 64 97 E3 29.97F THUNDER TC 18
PEORIA NOT AVBL
SPRINGFIELD LGT RAIN 67 64 90 SE7 29.95R TC 19
TAYLORVILLE CLOUDY 64 64 100 NW7 29.99R TC 18
ILZ033-039-045-046-055>057-062-063-181700-
EAST-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CHAMPAIGN TSTM 67 65 93 W23G30 30.00R TC 19
DANVILLE* N/A 73 70 90 S12G17 29.97R TC 23
MATTOON CLOUDY 75 69 81 S12 29.97R TC 24
PARIS* TSTM 69 67 92 SW9G26 29.99R TC 21
ILZ079-100>102-181700-
SOUTHWEST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
ALTON TSTM 66 64 94 NE6 30.00R TC 19
BELLEVILLE LGT RAIN 70 66 88 CALM 29.96R TC 21
CAHOKIA* CLOUDY 67 66 97 N7 29.98R TC 19
ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-181700-
SOUTH-CENTRAL ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
CARBONDALE PTSUNNY 80 70 71 S15G30 29.99S HX 83 TC 27
CAIRO* PTSUNNY 84 70 63 S13G18 30.02S HX 88 TC 29
EFFINGHAM* RAIN 70 70 100 S10G17 30.01R TC 21
MARION PTSUNNY 81 72 74 S16G26 30.00S HX 84 TC 27
MT. VERNON LGT RAIN 75 70 84 SW16G26 29.98F TC 24
CENTRALIA* TSTM 73 72 95 S12G17 29.98R TC 23
SALEM* TSTM 71 71 100 S9 29.98F TC 22
ILZ067-068-072-073-078-083-087-091-181700-
SOUTHEAST ILLINOIS
CITY SKY/WX TMP DP RH WIND PRES REMARKS
LAWRENCEVILLE MOSUNNY 85 69 58 S24G33 29.99S HX 89 TC 29
FLORA* RAIN 70 66 88 SW6 29.99S TC 21
FAIRFIELD* CLOUDY 79 67 67 S15G22 29.99R HX 81 TC 26
HARRISBURG* PTSUNNY 81 69 66 SW12G18 30.01S HX 84 TC 27
ABBREVIATIONS USED IN REMARKS
TC - TEMPERATURE IN CELSIUS
WCI - WIND CHILL INDEX
HX - HEAT INDEX
VSB - VISIBILITY
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