Bonus, IL Weather Forecast & Current Conditions

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Bonus Weather Map
UTC Time: 9/17/2026, 22:24
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Bonus, IL Regional Weather

Expires:202609172300;;624153
ASUS43 KLOT 172210
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
500 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.


ILZ003-004-008-010-011-017-018-172300-
NORTH CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ROCKFORD       CLOUDY    70  67  90 N8        30.21R TC  21           
FREEPORT*      CLOUDY    68  67  95 N5        30.22S TC  20           
ROCHELLE*      PTSUNNY   78  72  80 N10       30.18S HX  81  TC  26   
DE KALB*       CLOUDY    75  71  89 N10       30.20R TC  24           
PERU*          MOSUNNY   88  72  58 CALM      30.14S HX  94  TC  31   
$$


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

Bonus, IL

Late Afternoon
Rain Showers
58°14°
20%
Friday
Rain Showers
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
72°/ 62° 22°/ 17°
100%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 50° 17°/ 10°
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Thursday
Mostly Cloudy
68°20°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. Temperatures in the lower 70s. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle early in the evening. Lows in the upper 50s. Northeast winds around 5 mph. Chance of precipitation 20 percent.

Crystal Lake, IL

Late Afternoon
Rain Showers
60°16°
20%
Friday
Rain Showers
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
72°/ 62° 22°/ 17°
100%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 52° 17°/ 11°
0%
Wednesday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Thursday
Cloudy
68°20°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. Temperatures around 70. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle early in the evening. Lows around 60. Northeast winds around 5 mph. Chance of precipitation 20 percent.

DeKalb, IL

Late Afternoon
Rain Showers
62°17°
20%
Friday
Rain Showers
72°/ 62° 22°/ 17°
70%
Saturday
Thunderstorms
75°/ 62° 24°/ 17°
100%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tuesday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Wednesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Thursday
Cloudy
70°21°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. Temperatures in the upper 70s. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle in the evening. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Rockford, IL

Late Afternoon
Rain Showers
58°14°
20%
Friday
Rain Showers
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
72°/ 62° 22°/ 17°
100%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Thursday
Mostly Cloudy
68°20°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. Temperatures in the lower 70s. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle early in the evening. Lows in the upper 50s. Northeast winds around 5 mph. Chance of precipitation 20 percent.

Aurora, IL

Late Afternoon
Rain Showers
62°17°
20%
Friday
Mostly Cloudy
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
75°/ 62° 24°/ 17°
100%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 52° 17°/ 11°
0%
Wednesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Thursday
Cloudy
70°21°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle in the evening. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Rochelle, IL

Late Afternoon
Rain Showers
60°16°
20%
Friday
Thunderstorms
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
75°/ 62° 24°/ 17°
100%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 50° 17°/ 10°
0%
Wednesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Thursday
Cloudy
70°21°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. Temperatures in the mid 70s. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle early in the evening. Lows around 60. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Whitewater, WI

Today
Sprinkles
68°/ 58° 20°/ 14°
0%
Friday
Rain Showers
68°/ 58° 20°/ 14°
100%
Saturday
Thunderstorms
72°/ 60° 22°/ 16°
100%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
60%
Monday
Rain Showers
62°/ 50° 17°/ 10°
60%
Tuesday
Rain Showers
62°/ 50° 17°/ 10°
20%
Wednesday
Partly Cloudy
65°18°
0%

Day: Cloudy. Chance of sprinkles. Near steady temperature in the upper 60s. Northeast winds around 5 mph.

Night: Mostly cloudy through around midnight then becoming partly cloudy. Lows in the upper 50s. Northeast winds around 5 mph.

Janesville, WI

Today
Sprinkles
70°/ 58° 21°/ 14°
0%
Friday
Rain Showers
70°/ 60° 21°/ 16°
100%
Saturday
Thunderstorms
72°/ 60° 22°/ 16°
100%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
60%
Monday
Rain Showers
62°/ 50° 17°/ 10°
60%
Tuesday
Rain Showers
62°/ 48° 17°/
20%
Wednesday
Partly Cloudy
65°18°
0%

Day: Cloudy. Chance of sprinkles. Near steady temperature around 70. Northeast winds around 5 mph.

Night: Mostly cloudy through around midnight then becoming partly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Evanston, IL

Late Afternoon
Rain Showers
62°17°
20%
Friday
Mostly Cloudy
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
72°/ 62° 22°/ 17°
100%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
60%
Monday
Rain Showers
62°/ 55° 17°/ 13°
60%
Tuesday
Mostly Cloudy
62°/ 55° 17°/ 13°
0%
Wednesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Thursday
Mostly Cloudy
68°20°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. Temperatures in the lower 70s. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle in the evening. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Waukegan, IL

Late Afternoon
Rain Showers
62°17°
20%
Friday
Rain Showers
70°/ 62° 21°/ 17°
90%
Saturday
Thunderstorms
70°/ 62° 21°/ 17°
100%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 52° 17°/ 11°
0%
Wednesday
Mostly Cloudy
65°/ 55° 18°/ 13°
0%
Thursday
Mostly Cloudy
68°20°
0%

Day: Cloudy. Patchy fog. A slight chance of showers or patchy drizzle. Temperatures in the upper 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle early in the evening. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Kenosha, WI

Today
Sprinkles
72°/ 62° 22°/ 17°
0%
Friday
Rain Showers
68°/ 58° 20°/ 14°
100%
Saturday
Thunderstorms
72°/ 60° 22°/ 16°
100%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
60%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Rain Showers
62°/ 52° 17°/ 11°
20%
Wednesday
Partly Cloudy
65°18°
0%

Day: Cloudy. Chance of sprinkles. Highs in the lower 70s. Northeast winds 5 to 10 mph.

Night: Mostly cloudy through around midnight then becoming partly cloudy. Lows in the lower 60s. Northeast winds 5 to 10 mph.

Dixon, IL

Late Afternoon
Rain Showers
62°17°
20%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
78°/ 65° 26°/ 18°
90%
Sunday
Thunderstorms
70°/ 58° 21°/ 14°
70%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tuesday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Wednesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Thursday
Cloudy
70°21°
0%

Day: Mostly cloudy. A slight chance of showers or patchy drizzle. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle in the evening. Lows in the lower 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Naperville, IL

Late Afternoon
Rain Showers
65°18°
20%
Friday
Mostly Cloudy
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
75°/ 65° 24°/ 18°
100%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
60%
Monday
Rain Showers
62°/ 55° 17°/ 13°
60%
Tuesday
Mostly Cloudy
62°/ 55° 17°/ 13°
0%
Wednesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Thursday
Cloudy
70°21°
0%

Day: Cloudy. A slight chance of showers or patchy drizzle. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. A slight chance of showers or patchy drizzle in the evening. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Freeport, IL

Afternoon
Rain Showers
72°/ 58° 22°/ 14°
20%
Friday
Rain Showers
72°/ 62° 22°/ 17°
100%
Saturday
Thunderstorms
75°/ 62° 24°/ 17°
100%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
62°/ 52° 17°/ 11°
60%
Tuesday
Mostly Cloudy
62°/ 48° 17°/
0%
Wednesday
Partly Cloudy
65°18°
0%

Day: Mostly cloudy with a 20 percent chance of showers. Near steady temperature in the lower 70s. North winds around 5 mph.

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

Oswego, IL

Late Afternoon
Rain Showers
65°18°
20%
Friday
Mostly Cloudy
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
75°/ 65° 24°/ 18°
90%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
70%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Thursday
Cloudy
72°22°
0%

Day: Mostly cloudy. A slight chance of showers or patchy drizzle. Temperatures in the lower 80s. Northwest winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. Patchy drizzle early in the evening. A slight chance of showers and thunderstorms in the evening. Humid. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Racine, WI

Today
Sprinkles
72°/ 60° 22°/ 16°
0%
Friday
Rain Showers
68°/ 58° 20°/ 14°
100%
Saturday
Thunderstorms
70°/ 60° 21°/ 16°
100%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
50%
Monday
Rain Showers
62°/ 52° 17°/ 11°
50%
Tuesday
Rain Showers
62°/ 52° 17°/ 11°
20%
Wednesday
Partly Cloudy
65°18°
0%

Day: Cloudy. Chance of sprinkles. Highs in the lower 70s. Northeast winds 5 to 10 mph.

Night: Mostly cloudy through around midnight then becoming partly cloudy. Lows around 60. Northeast winds up to 10 mph.

Monroe, WI

Today
Sprinkles
68°/ 58° 20°/ 14°
0%
Friday
Rain Showers
68°/ 62° 20°/ 17°
100%
Saturday
Thunderstorms
75°/ 62° 24°/ 17°
100%
Sunday
Thunderstorms
65°/ 55° 18°/ 13°
70%
Monday
Rain Showers
62°/ 50° 17°/ 10°
60%
Tuesday
Rain Showers
62°/ 48° 17°/
20%
Wednesday
Partly Cloudy
65°18°
0%

Day: Cloudy. Chance of sprinkles. Near steady temperature in the upper 60s. Northeast winds around 5 mph.

Night: Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 50s. Northeast winds 5 to 10 mph.

Ottawa, IL

Late Afternoon
Thunderstorms
65°18°
20%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
80°/ 65° 27°/ 18°
90%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
70%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Mostly Cloudy
70°/ 55° 21°/ 13°
0%
Thursday
Cloudy
72°22°
0%

Day: Mostly cloudy. A slight chance of showers and thunderstorms or patchy drizzle. Temperatures in the mid 80s. Northwest winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. Patchy drizzle early in the evening. A slight chance of showers and thunderstorms in the evening. A slight chance of showers late. Humid. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Watertown, WI

Today
Sprinkles
68°/ 58° 20°/ 14°
0%
Friday
Rain Showers
68°/ 58° 20°/ 14°
100%
Saturday
Thunderstorms
70°/ 58° 21°/ 14°
100%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
50%
Monday
Rain Showers
62°/ 50° 17°/ 10°
50%
Tuesday
Rain Showers
62°/ 48° 17°/
20%
Wednesday
Partly Cloudy
65°18°
0%

Day: Cloudy. Chance of sprinkles. Near steady temperature in the upper 60s. Northeast winds around 5 mph.

Night: Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 50s. Northeast winds up to 10 mph.

Joliet, IL

Late Afternoon
Rain Showers
65°18°
20%
Friday
Mostly Cloudy
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
75°/ 65° 24°/ 18°
90%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Rain Showers
65°/ 55° 18°/ 13°
30%
Wednesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Thursday
Cloudy
70°21°
0%

Day: Mostly cloudy. A slight chance of showers or patchy drizzle. North winds around 5 mph. Chance of precipitation 20 percent.

Night: Mostly cloudy. Patchy drizzle early in the evening. A slight chance of showers and thunderstorms in the evening. Humid. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 20 percent.

Names listed above may include county names.

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