National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Regional Weather Roundup
Issued by NWS

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960
ASUS43 KLOT 171910
RWRIL

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
200 PM CDT THU SEP 17 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE STATIONS ARE NOT UNDER NWS QUALITY CONTROL. THEY ALSO MAY NOT
  REPORT WEATHER SUCH AS PRECIPITATION OR FOG.

ILZ001-002-007-009-015-016-024-172000-
NORTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
MOLINE         PTSUNNY   84  73  69 S6        30.16F HX  90  TC  29
STERLING*      MOSUNNY   85  74  69 VRB5      30.18F HX  92  TC  29
SAVANNA*       CLOUDY    78  72  82 N5        30.19F HX  80  TC  26
$$

ILZ003-004-008-010-011-017-018-172000-
NORTH CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ROCKFORD       CLOUDY    74  70  87 N6        30.21F TC  23
FREEPORT*      CLOUDY    74  73  95 CALM      30.22F TC  24
ROCHELLE*      CLOUDY    80  73  79 N6        30.19F HX  84  TC  27
DE KALB*       CLOUDY    80  73  78 CALM      30.20F HX  85  TC  27
PERU*          MOSUNNY   86  73  66 S3        30.16F HX  93  TC  30
$$

ILZ005-006-012>014-019>023-172000-
NORTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  CLOUDY    78  71  79 NW6       30.18F HX  80  TC  26
CHICAGO-MIDWAY PTSUNNY   81  71  71 N8        30.17F HX  85  TC  27
AURORA         PTSUNNY   81  73  76 NW6       30.19S HX  86  TC  27
JOLIET*        CLOUDY    83  76  79 SW3       30.18F HX  90  TC  28
WAUKEGAN       CLOUDY    70  69  97 VRB5      30.20S FOG     TC  21
DUPAGE AIRPORT CLOUDY    78  72  81 N5        30.19F HX  80  TC  26
KANKAKEE*      MOSUNNY   86  70  59 S7        30.18F HX  91  TC  30
WHEELING       CLOUDY    75  71  87 VRB5      30.21S TC  24
ROMEOVILLE*    PTSUNNY   82  81  94 W7        30.18F HX  95  TC  28
LANSING*       CLOUDY    81  71  71 CALM      30.18F HX  85  TC  27
NORTHERLY ISL*   N/A     72  67  84 N7          N/A  TC  22
$$

LMZ740>746-172000-
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)
NORTHERLY ISL              74     350/  7/  7   N/A
CALUMET HARBOR             76      40/  5/  7 1022.0
$$

ILZ025>027-034>036-040-047-049-050-058-095>099-172000-
WEST-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
QUINCY         SUNNY     92  74  55 W5        30.17F HX 101  TC  33
GALESBURG*     MOSUNNY   86  76  72 SW5       30.18F HX  96  TC  30
MACOMB*        SUNNY     90  78  67 W6        30.20S HX 103  TC  32
JACKSONVILLE*  SUNNY     96  72  46 W8        30.17F HX 103  TC  35
PITTSFIELD*    SUNNY     96  70  42 NW8       30.18F HX 102  TC  36
$$

ILZ028>032-037-038-041>044-048-051>054-059>061-172000-
CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
PONTIAC        SUNNY     89  74  59 SW7       30.16F HX  98  TC  32
BLOOMINGTON    SUNNY     89  75  63 SW12      30.19F HX  99  TC  32
DECATUR        SUNNY     93  73  52 CALM      30.18F HX 102  TC  34
PEORIA         SUNNY     88  73  61 W5        30.16F HX  95  TC  31
LACON*         SUNNY     85  72  64 W7        30.16F HX  92  TC  30
SPRINGFIELD    SUNNY     94  72  48 N6        30.17F HX 102  TC  34
TAYLORVILLE    NOT AVBL
$$

ILZ033-039-045-046-055>057-062-063-172000-
EAST-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHAMPAIGN      SUNNY     89  72  56 VRB5      30.19F HX  96  TC  32
RANTOUL*       SUNNY     88  71  56 SE7       30.19F HX  94  TC  31
MATTOON        MOSUNNY   94  70  45 MISG      30.18F HX 100  TC  34
PARIS*         SUNNY     90  71  53 CALM      30.20F HX  96  TC  32
$$

ILZ079-100>102-172000-
SOUTHWEST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ALTON          SUNNY     93  72  49 SW7       30.19F HX 100  TC  34
BELLEVILLE     MOSUNNY   94  74  51 SW7       30.18F HX 104  TC  35
CAHOKIA*       MOSUNNY   96  72  45 S6        30.18F HX 104  TC  36
SPARTA*        MOSUNNY   97  68  38 SW5       30.21F HX 102  TC  36
$$

ILZ064>066-069>071-074>076-080>082-084>086-088>090-092>094-172000-
SOUTH-CENTRAL ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CARBONDALE     MOSUNNY   97  66  36 SW5G16    30.20F HX 100  TC  36
CAIRO*         MOSUNNY   99  69  37 CALM      30.22F HX 104  TC  37
EFFINGHAM*     SUNNY     97  66  36 SW10      30.20F HX 100  TC  36
MT. VERNON     PTSUNNY   97  70  41 SW13      30.20F HX 103  TC  36
SALEM*         MOSUNNY   99  70  38 MISG      30.20F HX 106  TC  37
METROPOLIS*    SUNNY     96  65  35 SW6       30.23F HX  99  TC  36
$$

ILZ067-068-072-073-078-083-087-091-172000-
SOUTHEAST ILLINOIS

CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
LAWRENCEVILLE  MOSUNNY   93  69  45 W8        30.18F HX  98  TC  34
FLORA*         MOSUNNY   95  70  43 W8        30.20F HX 101  TC  35
FAIRFIELD*     PTSUNNY   95  66  38 SW9       30.19F HX  98  TC  35
ROBINSON*      PTSUNNY   95  70  43 W7        30.17F HX 101  TC  35
$$

ABBREVIATIONS USED IN REMARKS
   TC - TEMPERATURE IN CELSIUS
  WCI - WIND CHILL INDEX
   HX - HEAT INDEX
  VSB - VISIBILITY
$$