Princeton, IL Weather Forecast & Current Conditions

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Princeton Weather Map
UTC Time: 9/17/2026, 09:13
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Princeton, IL Regional Weather

Expires:202609171000;;593352
ASUS43 KLOT 170910
RWRIL 

ILLINOIS REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
400 AM 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.


ILZ003-004-008-010-011-017-018-171000-
NORTH CENTRAL ILLINOIS
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
ROCKFORD       CLOUDY    64  62  93 VRB3      30.21F TC  18           
FREEPORT*      CLOUDY    64  63  96 SE6       30.21F TC  18           
ROCHELLE*      LGT RAIN  65  65 100 NE6       30.19F TC  18           
DE KALB*       HVY RAIN  64  64 100 NE3       30.22S TC  18           
PERU*          CLOUDY    70  70 100 SE5       30.18S FOG     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

Princeton, IL

Today
Thunderstorms
80°/ 65° 27°/ 18°
70%
Friday
Rain Showers
78°/ 65° 26°/ 18°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
58°14°
50%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Showers likely with a chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early this morning. Humid with highs around 80. Southeast winds around 5 mph, becoming northwest this afternoon. Chance of rain 70 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Hennepin, IL

Today
Thunderstorms
82°/ 65° 28°/ 18°
70%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Rain Showers
88°/ 68° 31°/ 20°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Showers likely with a chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the lower 80s. East winds around 5 mph, becoming northwest around 5 mph this afternoon. Chance of rain 70 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Sterling, IL

Today
Thunderstorms
78°/ 62° 26°/ 17°
90%
Friday
Rain Showers
78°/ 65° 26°/ 18°
70%
Saturday
Rain Showers
85°/ 62° 29°/ 17°
70%
Sunday
Rain Showers
72°/ 58° 22°/ 14°
50%
Monday
Rain Showers
68°/ 52° 20°/ 11°
60%
Tue Night-Wed
Cloudy
52°11°
0%

Day: Showers with a chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early this morning. Humid with highs in the upper 70s. East winds around 5 mph, becoming north this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Humid with lows in the lower 60s. Northeast winds 5 to 10 mph.

Geneseo, IL

Today
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early. Humid with highs around 80. East winds around 5 mph, becoming northwest this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. A slight chance of showers after midnight. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Moline, IL

Today
Thunderstorms
78°/ 65° 26°/ 18°
70%
Friday
Rain Showers
78°/ 68° 26°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun-Sun Night
Thunderstorms
72°22°
60%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. Showers likely with a chance of thunderstorms early, then a chance of showers and thunderstorms this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early. Humid with highs in the upper 70s. East winds around 5 mph, becoming north this afternoon. Chance of rain 70 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph.

Mount Carroll, IL

Today
Thunderstorms
75°/ 60° 24°/ 16°
90%
Friday
Rain Showers
75°/ 65° 24°/ 18°
70%
Saturday
Rain Showers
82°/ 62° 28°/ 17°
80%
Sun-Sun Night
Rain Showers
68°20°
50%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tue Night-Wed
Cloudy
52°11°
0%

Day: Showers with a chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the mid 70s. East winds around 5 mph, becoming northeast around 5 mph this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Humid with lows around 60. Northeast winds 5 to 10 mph.

Davenport, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
90%
Friday
Rain Showers
78°/ 68° 26°/ 20°
70%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sunday
Rain Showers
70°/ 58° 21°/ 14°
60%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tue Night-Wed
Cloudy
52°11°
0%

Day: Showers with a chance of thunderstorms early, then a chance of showers with a slight chance of thunderstorms this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall this morning. Locally heavy rainfall possible early. Humid with highs in the upper 70s. East winds around 5 mph, becoming north this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds around 5 mph.

Clinton, IA

Today
Thunderstorms
75°/ 62° 24°/ 17°
90%
Friday
Rain Showers
75°/ 65° 24°/ 18°
70%
Saturday
Rain Showers
85°/ 62° 29°/ 17°
70%
Sunday
Rain Showers
68°/ 58° 20°/ 14°
60%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tue Night-Wed
Cloudy
52°11°
0%

Day: Showers with a chance of thunderstorms early, then showers likely with a chance of thunderstorms this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early. Humid with highs in the mid 70s. East winds around 5 mph, becoming northeast around 5 mph this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Humid with lows in the lower 60s. Northeast winds around 5 mph.

Aledo, IL

Today
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
80°/ 68° 27°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the lower 80s. East winds around 5 mph, becoming northwest around 5 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds 5 to 10 mph.

Freeport, IL

Today
Thunderstorms
72°/ 58° 22°/ 14°
90%
Friday
Rain Showers
72°/ 62° 22°/ 17°
80%
Saturday
Thunderstorms
80°/ 60° 27°/ 16°
90%
Sunday
Rain Showers
68°/ 52° 20°/ 11°
50%
Monday
Rain Showers
65°/ 50° 18°/ 10°
50%
Tue Night-Wed
Cloudy
50°10°
0%

Day: Showers with a chance of thunderstorms early this morning. Patchy fog early this morning. Humid with highs in the lower 70s. Northeast winds around 5 mph. Chance of rain 90 percent.

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

Monmouth, IL

Today
Thunderstorms
82°/ 65° 28°/ 18°
50%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Partly Cloudy
85°/ 65° 29°/ 18°
70%
Sunday
Thunderstorms
75°/ 60° 24°/ 16°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the lower 80s. East winds around 5 mph, becoming west around 5 mph this afternoon. Chance of rain 50 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds around 5 mph.

Maquoketa, IA

Today
Thunderstorms
75°/ 62° 24°/ 17°
90%
Friday
Rain Showers
75°/ 65° 24°/ 18°
80%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
80%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tue Night-Wed
Cloudy
52°11°
0%

Day: Showers with a chance of thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the mid 70s. East winds around 5 mph, becoming northeast around 5 mph this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Lows in the lower 60s. Northeast winds around 5 mph.

Muscatine, IA

Today
Thunderstorms
78°/ 65° 26°/ 18°
70%
Friday
Rain Showers
78°/ 68° 26°/ 20°
70%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
60%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
65°/ 55° 18°/ 13°
50%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. Showers likely with a chance of thunderstorms early, then a chance of showers and thunderstorms this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early. Humid with highs in the upper 70s. East winds around 5 mph, becoming north around 5 mph this afternoon. Chance of rain 70 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds around 5 mph.

Galena, IL

Today
Thunderstorms
72°/ 58° 22°/ 14°
90%
Friday
Rain Showers
72°/ 65° 22°/ 18°
90%
Saturday
Thunderstorms
80°/ 60° 27°/ 16°
90%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
50%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tue Night-Wed
Cloudy
52°11°
0%

Day: Showers with a chance of thunderstorms early this morning. Patchy fog early this morning. Humid with highs in the lower 70s. East winds around 5 mph, becoming northeast around 5 mph this afternoon. Chance of rain 90 percent.

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

Macomb, IL

Today
Thunderstorms
85°/ 68° 29°/ 20°
20%
Friday
Rain Showers
85°/ 68° 29°/ 20°
40%
Saturday
Partly Cloudy
88°/ 68° 31°/ 20°
70%
Sunday
Thunderstorms
78°/ 60° 26°/ 16°
70%
Monday
Rain Showers
68°/ 58° 20°/ 14°
70%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%

Day: Partly sunny early this morning, then becoming mostly sunny. A slight chance of showers and thunderstorms early this morning. Patchy fog early this morning. Humid with highs in the mid 80s. Southeast winds around 5 mph, becoming west around 5 mph this afternoon. Chance of rain 20 percent.

Night: Partly cloudy in the evening, then mostly cloudy with a slight chance of showers and thunderstorms after midnight. Humid with lows in the upper 60s. Northeast winds around 5 mph. Chance of rain 20 percent.

Tipton, IA

Today
Thunderstorms
75°/ 65° 24°/ 18°
90%
Friday
Rain Showers
75°/ 68° 24°/ 20°
70%
Saturday
Rain Showers
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
68°/ 58° 20°/ 14°
60%
Monday
Rain Showers
65°/ 55° 18°/ 13°
60%
Tuesday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%

Day: Mostly cloudy. Showers with a chance of thunderstorms early, then a chance of showers and thunderstorms this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Locally heavy rainfall possible early. Humid with highs in the mid 70s. East winds around 5 mph, becoming north around 5 mph this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds around 5 mph.

Oquawka, IL

Today
Thunderstorms
82°/ 68° 28°/ 20°
40%
Friday
Rain Showers
82°/ 70° 28°/ 21°
50%
Saturday
Mostly Cloudy
85°/ 68° 29°/ 20°
70%
Sunday
Thunderstorms
75°/ 60° 24°/ 16°
70%
Monday
Rain Showers
68°/ 58° 20°/ 14°
70%
Tuesday
Mostly Cloudy
68°/ 55° 20°/ 13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms early this morning. Patchy fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the lower 80s. East winds around 5 mph, becoming west this afternoon. Chance of rain 40 percent.

Night: Mostly cloudy. Humid with lows in the upper 60s. Northeast winds around 5 mph.

Wapello, IA

Today
Thunderstorms
80°/ 65° 27°/ 18°
50%
Friday
Rain Showers
82°/ 68° 28°/ 20°
70%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
58°14°
60%
Monday
Rain Showers
68°/ 55° 20°/ 13°
60%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms early this morning. Patchy fog early. Areas of fog this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs around 80. East winds around 5 mph. Chance of rain 50 percent.

Night: Mostly cloudy. Humid with lows in the mid 60s. Northeast winds around 5 mph.

Anamosa, IA

Today
Thunderstorms
75°/ 62° 24°/ 17°
90%
Friday
Rain Showers
75°/ 65° 24°/ 18°
80%
Saturday
Thunderstorms
82°/ 62° 28°/ 17°
70%
Sunday
Rain Showers
68°/ 55° 20°/ 13°
60%
Monday
Rain Showers
65°/ 52° 18°/ 11°
60%
Tuesday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%

Day: Mostly cloudy. Showers with a chance of thunderstorms early, then a chance of showers and thunderstorms this morning. Areas of fog early this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the mid 70s. East winds around 5 mph, becoming northeast around 5 mph this afternoon. Chance of rain 90 percent.

Night: Mostly cloudy. Humid with lows in the lower 60s. Northeast winds around 5 mph.

Burlington, IA

Today
Thunderstorms
82°/ 68° 28°/ 20°
40%
Friday
Rain Showers
82°/ 68° 28°/ 20°
50%
Saturday
Rain Showers
85°/ 65° 29°/ 18°
70%
Sun Night
Thunderstorms
60°16°
70%
Monday
Rain Showers
68°/ 55° 20°/ 13°
70%
Tue Night-Wed
Cloudy
55°13°
0%

Day: Mostly cloudy. A chance of showers and thunderstorms early this morning. Patchy fog early. Areas of fog this morning. Some thunderstorms may produce heavy rainfall early this morning. Humid with highs in the lower 80s. East winds around 5 mph, becoming north this afternoon. Chance of rain 40 percent.

Night: Mostly cloudy. Humid with lows in the upper 60s. Northeast winds around 5 mph.

Names listed above may include county names.

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