Sumner Park, IL Weather Forecast & Current Conditions

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Sumner Park Weather Map
UTC Time: 9/17/2026, 01:27
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Sumner Park, IL Regional Weather

Expires:202609170200;;574919
ASUS43 KLOT 170111
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
800 PM CDT WED SEP 16 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.


ILZ003-004-008-010-011-017-018-170200-
NORTH CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ROCKFORD       CLOUDY    65  64  97 NE5       30.29F TC  18           
FREEPORT*      CLOUDY    65  63  95 E5        30.30F TC  18           
ROCHELLE*      CLOUDY    66  66  99 NE7       30.30R TC  19           
DE KALB*       MOCLDY    65  64  98 NE5       30.30R TC  18           
PERU*          CLOUDY    72  68  88 NE5       30.28R TC  22           
$$


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

Sumner Park, IL

Tonight
Thunderstorms
62°17°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
70%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Mostly Cloudy
72°22°
0%

Night: Mostly cloudy. Isolated showers in the evening. Isolated thunderstorms late in the evening, then numerous showers and thunderstorms after midnight. Lows in the lower 60s. East winds 5 to 10 mph. Chance of precipitation 70 percent.

Freeport, IL

Tonight
Thunderstorms
62°17°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
70%
Friday
Rain Showers
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
80%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Rain Showers
65°/ 55° 18°/ 13°
50%
Tuesday
Mostly Cloudy
70°21°
0%
Wednesday
Mostly Cloudy
70°21°
0%

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

Rochelle, IL

Tonight
Thunderstorms
65°18°
90%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
70%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Mostly Cloudy
72°22°
0%

Night: Mostly cloudy. Isolated showers in the evening. Isolated thunderstorms late in the evening, then showers and thunderstorms after midnight. Locally heavy rainfall possible after midnight. Near steady temperature in the mid 60s. East winds 5 to 10 mph. Chance of precipitation 90 percent.

Monroe, WI

Tonight
Thunderstorms
60°16°
70%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
50%
Friday
Rain Showers
72°/ 65° 22°/ 18°
90%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
90%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Thunderstorms
65°/ 52° 18°/ 11°
50%
Tuesday
Rain Showers
68°/ 52° 20°/ 11°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. Chance of light showers through around midnight. Chance of thunderstorms through the night. Light showers likely after midnight. Lows around 60. East winds up to 10 mph. Chance of precipitation 70 percent.

Janesville, WI

Tonight
Thunderstorms
60°16°
70%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
50%
Friday
Rain Showers
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
90%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Thunderstorms
65°/ 55° 18°/ 13°
50%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. Chance of light showers through around midnight. Chance of thunderstorms through the night. Light showers likely after midnight. Lows around 60. East winds up to 5 mph. Chance of precipitation 70 percent.

Mount Carroll, IL

Tonight
Thunderstorms
62°17°
90%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Friday
Rain Showers
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
70°/ 58° 21°/ 14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tue Night
Mostly Cloudy
55°13°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Mostly cloudy. A slight chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of rain 90 percent.

Belvidere, IL

Tonight
Thunderstorms
62°17°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
70%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
50%
Monday
Rain Showers
65°/ 55° 18°/ 13°
50%
Tuesday
Rain Showers
68°/ 55° 20°/ 13°
30%
Wednesday
Mostly Cloudy
72°22°
0%

Night: Mostly cloudy. Isolated showers in the evening. Isolated thunderstorms late in the evening, then numerous showers and thunderstorms after midnight. Lows in the lower 60s. East winds 5 to 10 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

DeKalb, IL

Tonight
Thunderstorms
65°18°
90%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
70%
Friday
Thunderstorms
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%
Wednesday
Cloudy
72°22°
0%

Night: Mostly cloudy. Isolated showers in the evening. Isolated thunderstorms late in the evening, then showers and thunderstorms after midnight. Locally heavy rainfall possible after midnight. Lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of precipitation 90 percent.

Galena, IL

Tonight
Thunderstorms
62°17°
90%
Thursday
Thunderstorms
75°/ 60° 24°/ 16°
50%
Friday
Rain Showers
75°/ 65° 24°/ 18°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
80%
Sunday
Rain Showers
68°/ 58° 20°/ 14°
50%
Monday
Rain Showers
65°/ 55° 18°/ 13°
50%
Tuesday
Mostly Cloudy
68°/ 52° 20°/ 11°
0%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Near steady temperature in the lower 60s. East winds around 5 mph. Chance of rain 90 percent.

Darlington, WI

Tonight
Thunderstorms
60°16°
70%
Thursday
Rain Showers
72°/ 55° 22°/ 13°
50%
Friday
Thunderstorms
72°/ 65° 22°/ 18°
90%
Saturday
Thunderstorms
78°/ 60° 26°/ 16°
80%
Sunday
Thunderstorms
68°/ 55° 20°/ 13°
60%
Monday
Thunderstorms
65°/ 55° 18°/ 13°
50%
Tuesday
Rain Showers
68°/ 52° 20°/ 11°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. Chance of light showers through around midnight. Chance of thunderstorms through the night. Light showers likely after midnight. Lows around 60. East winds up to 5 mph. Chance of precipitation 70 percent.

Dixon, IL

Tonight
Thunderstorms
65°18°
100%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
80%
Friday
Thunderstorms
78°/ 65° 26°/ 18°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
70°/ 55° 21°/ 13°
50%
Tuesday
Mostly Cloudy
70°/ 55° 21°/ 13°
0%
Wednesday
Cloudy
72°22°
0%

Night: Isolated showers in the evening. Isolated thunderstorms late in the evening, then showers and thunderstorms after midnight. Locally heavy rainfall possible after midnight. Lows in the mid 60s. East winds around 5 mph. Chance of precipitation near 100 percent.

Whitewater, WI

Tonight
Thunderstorms
60°16°
50%
Thursday
Thunderstorms
72°/ 55° 22°/ 13°
50%
Friday
Rain Showers
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
78°/ 62° 26°/ 17°
90%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Thunderstorms
65°/ 55° 18°/ 13°
50%
Tuesday
Rain Showers
65°/ 55° 18°/ 13°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. Chance of sprinkles late in the evening. Chance of light showers and thunderstorms after midnight. Lows around 60. Northeast winds up to 10 mph. Chance of precipitation 50 percent.

Sterling, IL

Tonight
Thunderstorms
65°18°
90%
Thursday
Thunderstorms
78°/ 62° 26°/ 17°
90%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Thunderstorms
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
70°/ 55° 21°/ 13°
50%
Tue Night-Wed
Cloudy
55°13°
0%

Night: Mostly cloudy. A slight chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Lows in the mid 60s. East winds around 5 mph. Chance of rain 90 percent.

Crystal Lake, IL

Tonight
Thunderstorms
62°17°
70%
Thursday
Thunderstorms
75°/ 58° 24°/ 14°
70%
Friday
Thunderstorms
75°/ 62° 24°/ 17°
70%
Saturday
Thunderstorms
80°/ 62° 27°/ 17°
90%
Sunday
Thunderstorms
68°/ 58° 20°/ 14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tuesday
Rain Showers
68°/ 55° 20°/ 13°
30%
Wednesday
Cloudy
72°22°
0%

Night: Mostly cloudy. Isolated showers and thunderstorms in the evening, then numerous showers and thunderstorms after midnight. Lows in the lower 60s. Northeast winds 5 to 10 mph in the evening, becoming light and variable. Chance of precipitation 70 percent.

Madison, WI

Tonight
Thunderstorms
58°14°
50%
Thursday
Sprinkles
72°/ 55° 22°/ 13°
0%
Friday
Rain Showers
70°/ 62° 21°/ 17°
90%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
90%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Thunderstorms
65°/ 52° 18°/ 11°
50%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Mostly cloudy. Chance of light rain showers and slight chance of thunderstorms in the late evening and overnight. Lows in the upper 50s. East winds up to 10 mph. Chance of precipitation 50 percent.

Maquoketa, IA

Tonight
Thunderstorms
62°17°
90%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
80%
Friday
Rain Showers
75°/ 68° 24°/ 20°
70%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
68°/ 58° 20°/ 14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tuesday
Rain Showers
68°/ 55° 20°/ 13°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. A slight chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Near steady temperature in the lower 60s. East winds around 5 mph. Chance of rain 90 percent.

Aurora, IL

Tonight
Thunderstorms
65°18°
80%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
70%
Friday
Mostly Cloudy
75°/ 65° 24°/ 18°
50%
Saturday
Thunderstorms
82°/ 65° 28°/ 18°
70%
Sunday
Thunderstorms
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
68°/ 58° 20°/ 14°
50%
Tuesday
Rain Showers
68°/ 55° 20°/ 13°
30%
Wednesday
Cloudy
72°22°
0%

Night: Mostly cloudy. Isolated showers in the evening. Isolated thunderstorms late in the evening, then showers and thunderstorms after midnight. Locally heavy rainfall possible after midnight. Lows in the mid 60s. Northeast winds 5 to 10 mph in the evening, becoming light and variable. Chance of precipitation 80 percent.

Clinton, IA

Tonight
Thunderstorms
65°18°
90%
Thursday
Thunderstorms
75°/ 62° 24°/ 17°
90%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
50%
Tue Night-Wed
Cloudy
55°13°
0%

Night: Cloudy. A slight chance of showers and thunderstorms this evening, then showers with thunderstorms likely after midnight. Some thunderstorms may produce heavy rainfall. Locally heavy rainfall possible after midnight. Near steady temperature in the mid 60s. East winds around 5 mph. Chance of rain 90 percent.

Dodgeville, WI

Tonight
Thunderstorms
58°14°
50%
Thursday
Sprinkles
72°/ 55° 22°/ 13°
0%
Friday
Thunderstorms
72°/ 62° 22°/ 17°
90%
Saturday
Thunderstorms
78°/ 58° 26°/ 14°
90%
Sunday
Rain Showers
65°/ 55° 18°/ 13°
60%
Monday
Thunderstorms
65°/ 52° 18°/ 11°
50%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. Chance of light rain showers and slight chance of thunderstorms in the late evening and overnight. Lows in the upper 50s. East winds up to 5 mph. Chance of precipitation 50 percent.

Watertown, WI

Tonight
Thunderstorms
58°14°
50%
Thursday
Rain Showers
72°/ 55° 22°/ 13°
40%
Friday
Rain Showers
70°/ 62° 21°/ 17°
90%
Saturday
Thunderstorms
75°/ 58° 24°/ 14°
100%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Thunderstorms
65°/ 52° 18°/ 11°
50%
Tuesday
Rain Showers
65°/ 52° 18°/ 11°
30%
Wednesday
Partly Cloudy
72°22°
0%

Night: Cloudy. Chance of light showers and slight chance of thunderstorms in the late evening and overnight. Lows in the upper 50s. Northeast winds up to 10 mph. Chance of precipitation 50 percent.

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