Live Weather & Forecast
Weather in Princeton
Illinois, United States · Real-time conditions & 3-day outlook
22°C
Feels like 25°C
72°F / Feels 76°F
Overcast
Princeton, Illinois
🌞 Daytime
Updated: 2026-04-13 10:45
Humidity
71%
Wind
18.7 km/h SW
Wind Gust
25.8 km/h
Pressure
1014 mb
Visibility
16 km
UV Index
1.3
(Low)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
18°C
Wind Degree
220°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
148.9 μg/m³
NO₂
2 μg/m³
O₃
85 μg/m³
SO₂
1.3 μg/m³
PM 2.5
4.9 μg/m³
PM 10
5.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Princeton, Illinois
12 AM
17°
Overcast
1 AM
17°
Cloudy
2 AM
17°
Patchy light drizzle
3 AM
17°
Clear
4 AM
17°
Clear
5 AM
16°
Clear
6 AM
17°
Clear
7 AM
18°
Sunny
8 AM
19°
Sunny
9 AM
19°
Partly Cloudy
10 AM
22°
Overcast
11 AM
21°
Overcast
12 PM
21°
Overcast
1 PM
22°
Patchy rain nearby
2 PM
23°
Patchy rain nearby
3 PM
25°
Sunny
4 PM
26°
Sunny
5 PM
26°
Patchy rain nearby
6 PM
25°
Patchy rain nearby
7 PM
23°
Patchy rain nearby
8 PM
22°
Clear
9 PM
21°
Clear
10 PM
21°
Clear
11 PM
21°
Clear
3-Day Forecast
Daily overview for Princeton, Illinois
Today
Patchy rain nearby
27°
/
16°
🌧️ 89% chance of rain
💧 Avg. humidity: 86%
💨 Max wind: 29.5 km/h
🌧️ Total precip: 2.12 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:36 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
26°
/
20°
🌧️ 0% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 32.8 km/h
🌧️ Total precip: 0.05 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:19 AM
🌇 Sunset: 07:38 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Heavy rain
22°
/
20°
🌧️ 88% chance of rain
💧 Avg. humidity: 91%
💨 Max wind: 29.2 km/h
🌧️ Total precip: 103.76 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:18 AM
🌇 Sunset: 07:39 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Princeton
Plan your trip to Princeton, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Princeton?
Current conditions in Princeton: Overcast, temperature 22°C, humidity 71%.
What is the best time to visit Princeton?
The best time to visit Princeton is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Princeton?
Princeton is located at approximately 41.4° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Princeton?
The wettest period in Princeton is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Princeton?
For visits to Princeton during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Princeton in?
Princeton is located in United States, in the state of Illinois.
What are the public holidays in Princeton in 2026?
View the 2026 public holidays for Princeton on our Holidays page.
What are the GPS coordinates used for the weather forecast in Princeton?
The weather forecast for Princeton uses coordinates 41.3681, -89.4648.