Marengo, IL Weather Forecast & Current Conditions

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Marengo, IL Weather Maps

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Marengo Weather Map
UTC Time: 9/15/2026, 14:35
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Marengo, IL Regional Weather

Expires:202609151500;;493951
ASUS43 KLOT 151415
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
900 AM CDT TUE SEP 15 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.


ILZ005-006-012>014-019>023-151500-
NORTHEAST ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
CHICAGO-OHARE  LGT RAIN  67  61  81 S8        30.03R TC  19           
CHICAGO-MIDWAY CLOUDY    70  59  68 SW8       30.05S TC  21           
AURORA         CLOUDY    68  62  81 CALM      30.04S TC  20           
JOLIET*        PTSUNNY   72  62  70 S7        30.06S TC  22           
WAUKEGAN       LGT RAIN  65  62  90 SW7       30.00S TC  18           
DUPAGE AIRPORT CLOUDY    68  62  81 S5        30.04S TC  20           
KANKAKEE*      PTSUNNY   73  60  65 SW6       30.09S TC  23           
WHEELING       LGT RAIN  67  61  81 SW6       30.05R TC  19           
LANSING*       LGT RAIN  66  60  81 SW3       30.08S VSB 3/4 TC  19   
NORTHERLY ISL*   N/A     70  56  61 S6          N/A  TC  21           
$$


SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Marengo, IL

Today
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
50%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
50%
Friday
Rain Showers
75°/ 62° 24°/ 17°
60%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
70%
Sunday
Rain Showers
72°/ 55° 22°/ 13°
30%

Day: Mostly cloudy. Showers late in the morning. Isolated thunderstorms. Isolated showers in the afternoon. Highs in the mid 70s. Southwest winds 5 to 10 mph. Chance of precipitation 90 percent.

Night: Mostly cloudy. A slight chance of showers in the late evening and overnight. Lows in the upper 50s. Northwest winds 5 to 10 mph, becoming north after midnight. Chance of precipitation 20 percent.

Belvidere, IL

Today
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
50%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
50%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
60%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Rain Showers
72°/ 52° 22°/ 11°
30%

Day: Mostly cloudy. Showers late in the morning. Isolated thunderstorms. Isolated showers in the afternoon. Highs in the mid 70s. Southwest winds 5 to 10 mph. Chance of precipitation 90 percent.

Night: Mostly cloudy. Isolated thunderstorms early in the evening. A slight chance of showers. Lows in the upper 50s. North winds 5 to 10 mph, becoming northeast after midnight. Chance of precipitation 20 percent.

Aurora, IL

Today
Thunderstorms
78°/ 62° 26°/ 17°
70%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
60%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
72°/ 55° 22°/ 13°
40%

Day: Mostly cloudy. Numerous showers late in the morning. Isolated thunderstorms. Scattered showers in the afternoon. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A slight chance of showers in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Lows in the lower 60s. North winds 5 to 10 mph. Chance of precipitation 50 percent.

DeKalb, IL

Today
Thunderstorms
78°/ 60° 26°/ 16°
70%
Wednesday
Thunderstorms
72°/ 62° 22°/ 17°
60%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
75°/ 55° 24°/ 13°
40%

Day: Mostly cloudy. Numerous showers late in the morning. Isolated thunderstorms. Scattered showers in the afternoon. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A slight chance of showers in the evening. A slight chance of thunderstorms, then a chance of showers after midnight. Lows around 60. North winds 5 to 10 mph. Chance of precipitation 50 percent.

Rockford, IL

Today
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
50%
Thursday
Thunderstorms
78°/ 58° 26°/ 14°
50%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Rain Showers
72°/ 52° 22°/ 11°
30%

Day: Mostly cloudy. Showers late in the morning. Isolated thunderstorms. Isolated showers in the afternoon. Highs in the mid 70s. Southwest winds 5 to 10 mph. Chance of precipitation 90 percent.

Night: Mostly cloudy. Isolated showers and thunderstorms early in the evening. A slight chance of showers after midnight. Lows in the upper 50s. North winds 5 to 10 mph. Chance of precipitation 20 percent.

Whitewater, WI

Today
Thunderstorms
75°/ 55° 24°/ 13°
100%
Wednesday
Thunderstorms
72°/ 60° 22°/ 16°
60%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Friday
Rain Showers
72°/ 62° 22°/ 17°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
70°/ 52° 21°/ 11°
30%

Day: Slight chance of thunderstorms in the morning. Showers in the morning, then slight chance of light showers in the afternoon. Highs in the mid 70s. Southwest winds 5 to 15 mph. Chance of precipitation near 100 percent.

Night: Mostly cloudy. Lows in the mid 50s. North winds up to 5 mph.

Evanston, IL

Today
Thunderstorms
78°/ 62° 26°/ 17°
70%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
50%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
50%
Friday
Rain Showers
75°/ 65° 24°/ 18°
40%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
70%
Sunday
Rain Showers
72°/ 55° 22°/ 13°
40%

Day: Mostly cloudy. Numerous showers late in the morning. Isolated thunderstorms. Scattered showers in the afternoon. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A slight chance of showers in the evening. A slight chance of thunderstorms until early morning, then a chance of showers after midnight. Lows in the lower 60s. North winds around 5 mph. Chance of precipitation 40 percent.

Waukegan, IL

Today
Thunderstorms
78°/ 58° 26°/ 14°
90%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
50%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
50%
Friday
Rain Showers
75°/ 62° 24°/ 17°
50%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
70%
Sunday
Rain Showers
72°/ 55° 22°/ 13°
40%

Day: Mostly cloudy. Showers late in the morning. Isolated thunderstorms. Isolated showers in the afternoon. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of precipitation 90 percent.

Night: Mostly cloudy. A slight chance of showers in the late evening and overnight. Lows in the upper 50s. North winds 5 to 10 mph. Chance of precipitation 20 percent.

Rochelle, IL

Today
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
60%
Thursday
Thunderstorms
78°/ 60° 26°/ 16°
50%
Friday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Saturday
Thunderstorms
82°/ 60° 28°/ 16°
70%
Sunday
Rain Showers
72°/ 52° 22°/ 11°
30%

Day: Mostly cloudy. Showers late in the morning. Isolated thunderstorms. Isolated showers in the afternoon. Highs in the mid 70s. Southwest winds 5 to 10 mph. Chance of precipitation 90 percent.

Night: Mostly cloudy. Isolated thunderstorms early in the evening. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the upper 50s. North winds around 5 mph. Chance of precipitation 40 percent.

Janesville, WI

Today
Thunderstorms
75°/ 55° 24°/ 13°
100%
Wednesday
Thunderstorms
72°/ 60° 22°/ 16°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Friday
Rain Showers
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
70°/ 52° 21°/ 11°
30%

Day: Slight chance of thunderstorms in the morning. Showers in the morning, then slight chance of light showers early in the afternoon. Highs in the mid 70s. Southwest winds 5 to 15 mph. Chance of precipitation near 100 percent.

Night: Mostly cloudy. Lows in the mid 50s. North winds around 5 mph.

Kenosha, WI

Today
Thunderstorms
78°/ 58° 26°/ 14°
100%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
60%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
40%
Friday
Rain Showers
72°/ 62° 22°/ 17°
60%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
72°/ 55° 22°/ 13°
30%

Day: Slight chance of thunderstorms in the morning. Showers in the morning, then slight chance of light showers in the afternoon. Highs in the upper 70s. Southwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. Chance of precipitation near 100 percent.

Night: Mostly cloudy. Lows in the upper 50s. North winds 5 to 10 mph.

Naperville, IL

Today
Thunderstorms
78°/ 62° 26°/ 17°
70%
Wednesday
Rain Showers
72°/ 65° 22°/ 18°
60%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Rain Showers
78°/ 65° 26°/ 18°
40%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
40%

Day: Mostly cloudy. Numerous showers late in the morning. Isolated thunderstorms. Scattered showers in the afternoon. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. A chance of thunderstorms early in the evening. A chance of showers. A slight chance of thunderstorms in the late evening and overnight. Lows in the lower 60s. North winds around 5 mph. Chance of precipitation 50 percent.

Racine, WI

Today
Thunderstorms
75°/ 58° 24°/ 14°
90%
Wednesday
Mostly Cloudy
70°/ 60° 21°/ 16°
50%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
30%
Friday
Rain Showers
72°/ 62° 22°/ 17°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Thunderstorms
70°/ 55° 21°/ 13°
30%

Day: Cloudy. Slight chance of thunderstorms in the morning. Showers in the morning, then slight chance of light showers in the afternoon. Highs in the mid 70s. Southwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. Chance of precipitation 90 percent.

Night: Mostly cloudy. Lows in the upper 50s. North winds up to 10 mph.

Dixon, IL

Today
Thunderstorms
78°/ 60° 26°/ 16°
70%
Wednesday
Thunderstorms
72°/ 65° 22°/ 18°
60%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
60%
Sunday
Rain Showers
75°/ 55° 24°/ 13°
40%

Day: Mostly cloudy. Numerous showers late in the morning. Isolated thunderstorms. Scattered showers in the afternoon. Highs in the upper 70s. Southwest winds 5 to 10 mph. Chance of precipitation 70 percent.

Night: Mostly cloudy. Isolated showers early in the evening. A slight chance of thunderstorms. A chance of showers in the late evening and overnight. Lows around 60. North winds 5 to 10 mph, becoming northeast after midnight. Chance of precipitation 50 percent.

Oswego, IL

Today
Thunderstorms
82°/ 62° 28°/ 17°
70%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
60%
Thursday
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
40%

Day: Mostly cloudy. Scattered showers in the late morning and early afternoon. Isolated thunderstorms. Isolated showers late. Highs in the lower 80s. Southwest winds 5 to 10 mph, becoming west in the afternoon. Chance of precipitation 50 percent.

Night: Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows in the lower 60s. North winds 5 to 10 mph. Chance of precipitation 70 percent.

Chicago, IL

Today
Thunderstorms
80°/ 65° 27°/ 18°
50%
Wednesday
Rain Showers
72°/ 68° 22°/ 20°
60%
Thursday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Friday
Rain Showers
75°/ 65° 24°/ 18°
40%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
40%

Day: Mostly cloudy. Scattered showers in the late morning and early afternoon. Isolated thunderstorms. Isolated showers late. Highs around 80. Southwest winds 5 to 10 mph. Chance of precipitation 50 percent.

Night: Mostly cloudy. A chance of thunderstorms early in the evening. A chance of showers. A slight chance of thunderstorms in the late evening and overnight. Lows in the mid 60s. North winds 5 to 10 mph. Chance of precipitation 50 percent.

Joliet, IL

Today
Thunderstorms
82°/ 65° 28°/ 18°
70%
Wednesday
Thunderstorms
75°/ 65° 24°/ 18°
60%
Thursday
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
40%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Rain Showers
75°/ 58° 24°/ 14°
40%

Day: Mostly cloudy. Isolated thunderstorms in the late morning and early afternoon. Scattered showers. Scattered thunderstorms late. Highs in the lower 80s. Southwest winds around 10 mph, becoming west in the afternoon. Chance of precipitation 50 percent.

Night: Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Humid with lows in the mid 60s. North winds 5 to 10 mph. Chance of precipitation 70 percent.

Freeport, IL

Today
Thunderstorms
75°/ 58° 24°/ 14°
100%
Wednesday
Rain Showers
72°/ 62° 22°/ 17°
80%
Thursday
Rain Showers
78°/ 58° 26°/ 14°
40%
Friday
Rain Showers
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
70%
Sunday
Rain Showers
72°22°
30%

Day: Showers with a chance of thunderstorms this morning, then a chance of showers with a slight chance of thunderstorms this afternoon. Highs in the mid 70s. Southwest winds 10 to 15 mph with gusts up to 25 mph, becoming west 5 to 10 mph this afternoon. Chance of rain near 100 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Lows in the upper 50s. North winds around 5 mph. Chance of rain 20 percent.

Watertown, WI

Today
Thunderstorms
75°/ 55° 24°/ 13°
100%
Wednesday
Mostly Cloudy
72°/ 58° 22°/ 14°
50%
Thursday
Rain Showers
75°/ 58° 24°/ 14°
20%
Friday
Rain Showers
72°/ 60° 22°/ 16°
80%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
80%
Sunday
Thunderstorms
70°/ 52° 21°/ 11°
30%

Day: Slight chance of thunderstorms in the morning. Showers in the morning, then slight chance of light showers early in the afternoon. Highs in the mid 70s. Southwest winds 10 to 15 mph. Chance of precipitation near 100 percent.

Night: Mostly cloudy. Lows in the mid 50s. North winds up to 5 mph.

Waukesha, WI

Today
Thunderstorms
75°/ 55° 24°/ 13°
90%
Wednesday
Partly Cloudy
70°/ 60° 21°/ 16°
50%
Thursday
Rain Showers
75°/ 58° 24°/ 14°
20%
Friday
Rain Showers
72°/ 60° 22°/ 16°
80%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
80%
Sunday
Thunderstorms
68°/ 52° 20°/ 11°
30%

Day: Cloudy. Slight chance of thunderstorms in the morning. Showers in the morning, then slight chance of light showers early in the afternoon. Highs in the mid 70s. Southwest winds 10 to 15 mph. Gusts up to 30 mph in the morning. Chance of precipitation 90 percent.

Night: Mostly cloudy. Lows in the mid 50s. North winds up to 10 mph.

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