Princeton Weather Forecast
- 75
- 93
Becoming Sunny
- 72
- 92
Chance Thunderstorms
- 69
- 84
Chance Thunderstorms
- 71
- 87
Chance Thunderstorms
- 71
- 91
Mostly Sunny
- 72
- 92
Slight Chance Thunderstorms
Today 23 Jul Bureau
Sunny, hot with Highs in the lower 90s. South Winds around 10 Mph. Heat index Values up to 105.
Tonight 23 Jul Bureau
Partly cloudy. Near steady temperature in the mid 70s. Southeast Winds 5 to 10 Mph.
Princeton Temperature Statistics
July Temperature
Illinois Valley Regional Airport (16.2 miles)
Lowest 18 July, 2025
59 °FAverage July
75.7 °FHighest 4 July, 2025
91 °F
Climate (2020–Present)
Illinois Valley Regional Airport (16.2 miles)
Average Low 2020–2025
43.1 °FAverage 2020–2025
52.6 °FAverage High 2020–2025
62 °F