Princeton, Illinois 7 Day & Night Forecast & Conditions

Current Conditions

Maps Alerts Climate Index

Partly Cloudy 81°F 27°C Heat Index: 85°F	Observed at: Princeton, IL	Elevation: 771 ft | 235 m
	Last Updated: July 16, 10:15 PM Timezone: GMT -5/-4
	Sky Conditions: Partly Cloudy	Temperature: 81°F | 27°C
	Pressure: 29.24 in | 990.1 mb	Dewpoint: 72°F | 22°C
	Humidity: 74%	Wind: NNE 3 mph | NNE 5 kph
	Feels Like: 89°F | 32°C	Visibility: 42.2 mi | 67.9 km
	Lat/Long: 41.3681 | -89.4647	Sunrise: 5:38 AM   Sunset: 8:29 PM

7 Day Graphical Forecast

Valid: 10:20 PM 7/16/2026

Tonight Overcast 72 °F 4% Chance Precipitation Friday Overcast 91 |73 °F 22% Chance Precipitation Saturday Overcast 90 |70 °F 42% Chance Precipitation Sunday Overcast 81 |65 °F 2% Chance Precipitation Monday Overcast 85 |66 °F 34% Chance Precipitation Tuesday Light Drizzle 82 |64 °F 34% Chance Precipitation Wednesday Partly Cloudy 70 |48 °F 3% Chance Precipitation

7 Hour Graphical Forecast

Valid: 10:20 PM 7/16/2026

10 PM Partly Cloudy 81 °F 1% Chance Precipitation

11 PM Overcast 81 °F 3% Chance Precipitation

12 AM Mostly Clear 79 °F 2% Chance Precipitation

1 AM Clear 78 °F 3% Chance Precipitation

2 AM Clear 77 °F 5% Chance Precipitation

3 AM Clear 76 °F 3% Chance Precipitation

4 AM Clear 75 °F 6% Chance Precipitation

7 Day Textual Forecast - with QPF, Max Wind, Humidity, Snowfall & UV Index

7 Day & Night Weather Forecast for Princeton, IL - (Fahrenheit & Celsius) Valid: 10:20 PM 7/16/2026 Tonight Overcast with a low around 72°F [22°C]. NW wind to around 6 mph [10 kph], with gusts to near 10 mph [16 kph]. Chance of precipitation 4% with QPF of 0.00 in [0.0 mm]. Friday Overcast with a high near 91°F [33°C]. SW wind to around 11 mph [17 kph], with gusts to near 15 mph [24 kph]. Dewpoint near 72°F [22°C] with humidity of 89%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.5. Chance of precipitation 22% with QPF of 0.00 in [0.0 mm]. Friday Night Overcast with a low around 73°F [23°C]. SW wind to around 11 mph [17 kph], with gusts to near 15 mph [24 kph]. Chance of precipitation 22% with QPF of 0.00 in [0.0 mm]. Saturday Overcast with a high near 90°F [32°C]. WNW wind to around 17 mph [28 kph], with gusts to near 30 mph [48 kph]. Dewpoint near 72°F [22°C] with humidity of 90%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.5. Chance of precipitation 42% with QPF of 0.04 in [1.0 mm]. Saturday Night Overcast with a low around 70°F [21°C]. WNW wind to around 17 mph [28 kph], with gusts to near 30 mph [48 kph]. Chance of precipitation 42% with QPF of 0.04 in [1.0 mm]. Sunday Overcast with a high near 81°F [27°C]. E wind to around 8 mph [12 kph], with gusts to near 10 mph [16 kph]. Dewpoint near 72°F [22°C] with humidity of 96%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.55. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Sunday Night Overcast with a low around 65°F [18°C]. E wind to around 8 mph [12 kph], with gusts to near 10 mph [16 kph]. Chance of precipitation 2% with QPF of 0.00 in [0.0 mm]. Monday Overcast with a high near 85°F [29°C]. S wind to around 12 mph [19 kph], with gusts to near 33 mph [53 kph]. Dewpoint near 72°F [22°C] with humidity of 94%. Pressure around 29.24 in [990.1 mb]. UV Index: 6.95. Chance of precipitation 34% with QPF of 0.00 in [0.0 mm]. Monday Night Overcast with a low around 66°F [19°C]. S wind to around 12 mph [19 kph], with gusts to near 33 mph [53 kph]. Chance of precipitation 34% with QPF of 0.00 in [0.0 mm]. Tuesday Light Drizzle with a high near 82°F [28°C]. NW wind to around 16 mph [26 kph], with gusts to near 36 mph [58 kph]. Dewpoint near 72°F [22°C] with humidity of 87%. Pressure around 29.24 in [990.1 mb]. UV Index: 6.75. Chance of precipitation 34% with QPF of 0.00 in [0.1 mm]. Tuesday Night Light Drizzle with a low around 64°F [18°C]. NW wind to around 16 mph [26 kph], with gusts to near 36 mph [58 kph]. Chance of precipitation 34% with QPF of 0.00 in [0.1 mm]. Wednesday Partly Cloudy with a high near 70°F [21°C]. NNE wind to around 15 mph [25 kph], with gusts to near 28 mph [45 kph]. Dewpoint near 72°F [22°C] with humidity of 86%. Pressure around 29.24 in [990.1 mb]. UV Index: 7.15. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm]. Wednesday Night Partly Cloudy with a low around 48°F [9°C]. NNE wind to around 15 mph [25 kph], with gusts to near 28 mph [45 kph]. Chance of precipitation 3% with QPF of 0.00 in [0.0 mm].

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7 Day and Night - QPF Forecast for Princeton, IL

Tonight: 0.0 mm | 0.00 in

Friday: 0.0 mm | 0.00 in

Friday Night: 0.0 mm | 0.00 in

Saturday: 1.0 mm | 0.04 in

Saturday Night: 1.0 mm | 0.04 in

Sunday: 0.0 mm | 0.00 in

Sunday Night: 0.0 mm | 0.00 in

Monday: 0.0 mm | 0.00 in

Monday Night: 0.0 mm | 0.00 in

Tuesday: 0.1 mm | 0.00 in

Tuesday Night: 0.1 mm | 0.00 in

Wednesday: 0.0 mm | 0.00 in

Wednesday Night: 0.0 mm | 0.00 in

7 Day and Night - Maximum Wind Speed Forecast for Princeton, IL

Tonight: NW @ 10 kph | 6 mph

Friday: SW @ 17 kph | 11 mph

Friday Night: SW @ 17 kph | 11 mph

Saturday: WNW @ 28 kph | 17 mph

Saturday Night: WNW @ 28 kph | 17 mph

Sunday: E @ 12 kph | 8 mph

Sunday Night: E @ 12 kph | 8 mph

Monday: S @ 19 kph | 12 mph

Monday Night: S @ 19 kph | 12 mph

Tuesday: NW @ 26 kph | 16 mph

Tuesday Night: NW @ 26 kph | 16 mph

Wednesday: NNE @ 25 kph | 15 mph

Wednesday Night: NNE @ 25 kph | 15 mph

7 Day and Night - Maximum Humidity Forecast for Princeton, IL

Tonight: 90 %

Friday: 89 %

Friday Night: 89 %

Saturday: 90 %

Saturday Night: 90 %

Sunday: 96 %

Sunday Night: 96 %

Monday: 94 %

Monday Night: 94 %

Tuesday: 87 %

Tuesday Night: 87 %

Wednesday: 86 %

Wednesday Night: 86 %

7 Day and Night - Snowfall Totals Forecast for Princeton, IL

Tonight: 0.0 cm | 0.00 in

Friday: 0.0 cm | 0.00 in

Friday Night: 0.0 cm | 0.00 in

Saturday: 0.0 cm | 0.00 in

Saturday Night: 0.0 cm | 0.00 in

Sunday: 0.0 cm | 0.00 in

Sunday Night: 0.0 cm | 0.00 in

Monday: 0.0 cm | 0.00 in

Monday Night: 0.0 cm | 0.00 in

Tuesday: 0.0 cm | 0.00 in

Tuesday Night: 0.0 cm | 0.00 in

Wednesday: 0.0 cm | 0.00 in

Wednesday Night: 0.0 cm | 0.00 in

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