Weather Alert
Princeton Weather Warning NWS WEATHER ALERT FOR THE PRINCETON, IL AREA - Issued: 343 AM CDT Mon Sep 21 2026 Princeton Weather Warning

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Princeton, IL Weather Forecast

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Princeton, IL Weather Forecast

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Princeton IL weather - Overcast - 61°F
Overcast
61°F
Updated 10:22 pm
Feels Like 52°F
Humidity 75%
Wind NE 7 mph
Barometer  30.14 in
Dew Point 53°F
Princeton IL weather - Overcast - 16°C
Overcast
16°C
Updated 10:22 pm
Feels Like 11°C
Humidity 75%
Wind NE 11 km/h
Barometer  102 kPa
Dew Point 12°C
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Princeton Weather Forecast

TONIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY FRIDAY SATURDAY SUNDAY SUNDAY NIGHT MONDAY
Princeton, IL Weather - Tonight Chance Of Showers Princeton, IL Weather - Tuesday Chance Of Showers Princeton, IL Weather - Tuesday Night Partly Cloudy Princeton, IL Weather - Wednesday Mostly Sunny Princeton, IL Weather - Wednesday Night Partly Cloudy Princeton, IL Weather - Thursday Mostly Cloudy Princeton, IL Weather - Friday Mostly Cloudy Princeton, IL Weather - Saturday Mostly Cloudy Princeton, IL Weather - Sunday Mostly Cloudy Princeton, IL Weather - Sunday Night Partly Cloudy Princeton, IL Weather - Monday Partly Cloudy
Chance of Showers Chance of Showers Partly Cloudy Mostly Sunny Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy Partly Cloudy
Lo: 55°FLo: 13°C Hi: 65°FHi: 18°C
 Lo: 50°FLo: 10°C Hi: 69°FHi: 21°C
 Lo: 51°FLo: 11°C Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C		 Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C		 Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C		 Hi: 69°FHi: 21°C
Lo: 51°FLo: 11°C		 Hi: 75°FHi: 24°C
Lo: 55°FLo: 13°C		 Hi: 75°FHi: 24°C
Lo: 55°FLo: 13°C
POP: 40% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 931 PM CDT Mon Sep 21 2026 Princeton, IL Weather - WeatherWorld.com

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Issued: 658 PM CDT Mon Sep 21 2026

Key Messages

  • An upper low over the northern plains will continue to roll through the area through Tuesday morning, with mostly light amounts of rain and drizzle. Then expected a precip break for Wednesday thru Friday.
  • Pleasant early fall weather is expected for Wednesday through Friday.

Aviation

/00Z TAFS THROUGH 00Z WEDNESDAY/... Issued at 655 PM CDT Mon Sep 21 2026

Widespread low stratus will remain over eastern Iowa and northwest Illinois through tonight into Tuesday AM, leading to periods of MVF...