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Princeton IL Weather - Mostly Cloudy - 73°F
Mostly Cloudy
73°F
Updated 12:01 pm
Feels Like 59°F
Humidity 45%
Wind N 8 mph
Barometer  30.13 in
Dew Point 51°F
Princeton IL Weather - Mostly Cloudy - 23°C
Mostly Cloudy
23°C
Updated 12:01 pm
Feels Like 15°C
Humidity 45%
Wind N 13 km/h
Barometer  102 kPa
Dew Point 10°C
Princeton, IL Weather and Current Conditionsprinceton il weather forecast

Princeton, IL Weather Forecast

Princeton Illinois WeatherPrinceton, Illinois Weather Weather Forecast
Here is the API 14 day weather forecast for Princeton, Illinois. Note: The 7-day weather forecast for Princeton, IL is the most reliable and accurate weather forecast. This template should only be used as a probable scenario. Forecasting weather beyond the next 7 days is a challenge.
Princeton, IL Weather Forecast Dated: 1201 PM Sun Sep 13 2026
Expect a cool pattern with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.

Sunday, September 13, 2026

Mid-Morning
Princeton Weather - 2026-09-13 - Morning - Overcast
59°F 15°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-13 - Afternoon - Overcast
69°F 21°C
Overcast
Early-Evening
Princeton Weather - 2026-09-13 - Evening - Partly Cloudy
64°F 18°C
Partly Cloudy
Pleasant near 69°F 21°C, overcast through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the NNE to the NE at 7 mph 11 km/h.

Monday, September 14, 2026

Mid-Morning
Princeton Weather - 2026-09-14 - Morning - Sunny
57°F 14°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-09-14 - Afternoon - Overcast
68°F 20°C
Overcast
Early-Evening
Princeton Weather - 2026-09-14 - Evening - Overcast
67°F 20°C
Overcast
Comfortable with temperatures reaching 68°F 20°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds switching from the ESE to the SE at 17 mph 27 km/h. Gusts up to 35 mph 56 km/h.

Tuesday, September 15, 2026

Mid-Morning
Princeton Weather - 2026-09-15 - Morning - Light Showers
67°F 19°C
Light Showers
Mid-Afternoon
Princeton Weather - 2026-09-15 - Afternoon - Scattered Showers
80°F 27°C
Scattered Showers
Early-Evening
Princeton Weather - 2026-09-15 - Evening - Scattered Showers
68°F 20°C
Scattered Showers
Very warm near 80°F 27°C, though humidity makes it feel like 84°F 29°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the S to the NNW at 11 mph 18 km/h. Gusts up to 21 mph 33 km/h.

Wednesday, September 16, 2026

Mid-Morning
Princeton Weather - 2026-09-16 - Morning - Overcast
62°F 16°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-16 - Afternoon - Light Showers
64°F 18°C
Light Showers
Early-Evening
Princeton Weather - 2026-09-16 - Evening - Scattered Showers
62°F 17°C
Scattered Showers
Cool with a high near 64°F 18°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds swinging from the ENE to the NE at 9 mph 15 km/h.

Thursday, September 17, 2026

Mid-Morning
Princeton Weather - 2026-09-17 - Morning - Light Fog
61°F 16°C
Light Fog
Mid-Afternoon
Princeton Weather - 2026-09-17 - Afternoon - Scattered Showers
70°F 21°C
Scattered Showers
Early-Evening
Princeton Weather - 2026-09-17 - Evening - Cloudy
66°F 19°C
Cloudy
Mild with a high of 70°F 21°C, scattered downpours possible, with lower humidity and steady pressure. Winds shifting from the NE to the ENE at 7 mph 11 km/h.

Friday, September 18, 2026

Mid-Morning
Princeton Weather - 2026-09-18 - Morning - Light Fog
63°F 17°C
Light Fog
Mid-Afternoon
Princeton Weather - 2026-09-18 - Afternoon - Cloudy
72°F 22°C
Cloudy
Early-Evening
Princeton Weather - 2026-09-18 - Evening - Sunny
67°F 19°C
Sunny
Pleasant near 72°F 22°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with steady humidity and barometric pressure falling. Winds turning from the ESE to the SE at 10 mph 15 km/h. Gusts up to 22 mph 35 km/h.

Saturday, September 19, 2026

Mid-Morning
Princeton Weather - 2026-09-19 - Morning - Sunny
67°F 19°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-09-19 - Afternoon - Sunny
83°F 29°C
Sunny
Early-Evening
Princeton Weather - 2026-09-19 - Evening - Sunny
80°F 27°C
Sunny
Warm and summery around 83°F 29°C (feels like 88°F 31°C), sunny throughout the day, with steady humidity and barometric pressure falling. Winds switching from the S to the WNW at 8 mph 13 km/h.

Sunday, September 20, 2026

Mid-Morning
Princeton Weather - 2026-09-20 - Morning - Scattered Showers
62°F 17°C
Scattered Showers
Mid-Afternoon
Princeton Weather - 2026-09-20 - Afternoon - Light Showers
60°F 15°C
Light Showers
Early-Evening
Princeton Weather - 2026-09-20 - Evening - Light Showers
60°F 15°C
Light Showers
Cool with a high near 60°F 15°C, scattered downpours possible, with steady humidity and steady pressure. Winds blowing from the NE at 13 mph 20 km/h. Gusts up to 32 mph 52 km/h.

Monday, September 21, 2026

Mid-Morning
Princeton Weather - 2026-09-21 - Morning - Light Showers
54°F 12°C
Light Showers
Mid-Afternoon
Princeton Weather - 2026-09-21 - Afternoon - Light Showers
53°F 12°C
Light Showers
Early-Evening
Princeton Weather - 2026-09-21 - Evening - Light Showers
52°F 11°C
Light Showers
Brisk around 53°F 12°C, on-and-off showers throughout the day, with steady humidity and steady pressure. Winds swinging from the ENE to the NE at 17 mph 27 km/h. Gusts up to 31 mph 49 km/h.

Tuesday, September 22, 2026

Mid-Morning
Princeton Weather - 2026-09-22 - Morning - Scattered Showers
50°F 10°C
Scattered Showers
Mid-Afternoon
Princeton Weather - 2026-09-22 - Afternoon - Scattered Showers
49°F 10°C
Scattered Showers
Early-Evening
Princeton Weather - 2026-09-22 - Evening - Scattered Showers
49°F 10°C
Scattered Showers
Cool and brisk at 49°F 10°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds out of the NNW at 16 mph 25 km/h. Gusts up to 28 mph 46 km/h.

Wednesday, September 23, 2026

Mid-Morning
Princeton Weather - 2026-09-23 - Morning - Overcast
50°F 10°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-23 - Afternoon - Overcast
50°F 10°C
Overcast
Early-Evening
Princeton Weather - 2026-09-23 - Evening - Overcast
52°F 11°C
Overcast
Chilly near 50°F 10°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the NNW at 13 mph 22 km/h. Gusts up to 25 mph 40 km/h.

Thursday, September 24, 2026

Mid-Morning
Princeton Weather - 2026-09-24 - Morning - Sunny
53°F 12°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-09-24 - Afternoon - Scattered Showers
62°F 17°C
Scattered Showers
Early-Evening
Princeton Weather - 2026-09-24 - Evening - Overcast
58°F 15°C
Overcast
Cool with a high near 62°F 17°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds switching from the ESE to the NE at 6 mph 9 km/h.

Friday, September 25, 2026

Mid-Morning
Princeton Weather - 2026-09-25 - Morning - Sunny
55°F 13°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-09-25 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
Princeton Weather - 2026-09-25 - Evening - Sunny
61°F 17°C
Sunny
Refreshing around 67°F 20°C, sunny throughout the day, with steady humidity and steady pressure.

Saturday, September 26, 2026

Mid-Morning
Princeton Weather - 2026-09-26 - Morning - Sunny
58°F 15°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-09-26 - Afternoon - Sunny
70°F 21°C
Sunny
Early-Evening
Princeton Weather - 2026-09-26 - Evening - Overcast
64°F 18°C
Overcast
Mild temperatures up to 70°F 21°C, sunny in the morning, cloudy in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure.

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Weather by the Numbers

Sun, 13th
Princeton IL Weather - Sunday, Sep 13, 2026 - Cloudy
Hi: 70°F 21°C
Lo: 57°F 14°C
Sunrise 06:36 AM
Sunset 07:11 PM
Wind N 10 mph15 km/h
Dew Point 49°F10°C
uv Index 6
Barometric Pressure 30.12 in1020 mb
POP 7% *
Humidity 52%
Mon, 14th
Princeton IL Weather - Monday, Sep 14, 2026 - Partly Cloudy
Hi: 68°F 20°C
Lo: 53°F 12°C
Sunrise 06:37 AM
Sunset 07:09 PM
Wind SE 14 mph22 km/h
Dew Point 50°F10°C
uv Index 6
Barometric Pressure 30.21 in1023 mb
POP 7% *
Humidity 56%
Tue, 15th
Princeton IL Weather - Tuesday, Sep 15, 2026 - Light Rain Shower
Hi: 80°F 27°C
Lo: 62°F 16°C
Sunrise 06:38 AM
Sunset 07:07 PM
Wind SW 10 mph16 km/h
Dew Point 70°F21°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 53% *
Humidity 76%
Wed, 16th
Princeton IL Weather - Wednesday, Sep 16, 2026 - Light Rain Shower
Hi: 65°F 18°C
Lo: 59°F 15°C
Sunrise 06:39 AM
Sunset 07:05 PM
Wind NE 5 mph8 km/h
Dew Point 59°F15°C
uv Index 2
Barometric Pressure 30.3 in1026 mb
POP 77% *
Humidity 91%
Thu, 17th
Princeton IL Weather - Thursday, Sep 17, 2026 - Overcast
Hi: 70°F 21°C
Lo: 59°F 15°C
Sunrise 06:40 AM
Sunset 07:04 PM
Wind ENE 7 mph12 km/h
Dew Point 61°F16°C
uv Index 4
Barometric Pressure 30.3 in1026 mb
POP 28% *
Humidity 87%
Fri, 18th
Princeton IL Weather - Friday, Sep 18, 2026 - Overcast
Hi: 72°F 22°C
Lo: 59°F 15°C
Sunrise 06:41 AM
Sunset 07:02 PM
Wind ESE 11 mph18 km/h
Dew Point 56°F14°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 14% *
Humidity 65%
Sat, 19th
Princeton IL Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 85°F 30°C
Lo: 61°F 16°C
Sunrise 06:42 AM
Sunset 07:00 PM
Wind SSW 13 mph21 km/h
Dew Point 65°F18°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 5% *
Humidity 68%
Sun, 20th
Princeton IL Weather - Sunday, Sep 20, 2026 - Light Rain Shower
Hi: 71°F 21°C
Lo: 59°F 15°C
Sunrise 06:43 AM
Sunset 06:58 PM
Wind NE 9 mph15 km/h
Dew Point 60°F16°C
uv Index 4
Barometric Pressure 29.91 in1013 mb
POP 76% *
Humidity 95%
Mon, 21st
Princeton IL Weather - Monday, Sep 21, 2026 - Light Rain Shower
Hi: 58°F 15°C
Lo: 51°F 11°C
Sunrise 06:44 AM
Sunset 06:57 PM
Wind ENE 19 mph30 km/h
Dew Point 52°F11°C
uv Index 3
Barometric Pressure 29.97 in1015 mb
POP 71% *
Humidity 93%
Tue, 22nd
Princeton IL Weather - Tuesday, Sep 22, 2026 - Patchy Rain Nearby
Hi: 51°F 11°C
Lo: 49°F 10°C
Sunrise 06:45 AM
Sunset 06:55 PM
Wind WSW 15 mph24 km/h
Dew Point 48°F9°C
uv Index 2
Barometric Pressure 30 in1016 mb
POP 43% *
Humidity 95%
Wed, 23rd
Princeton IL Weather - Wednesday, Sep 23, 2026 - Overcast
Hi: 52°F 11°C
Lo: 49°F 9°C
Sunrise 06:46 AM
Sunset 06:53 PM
Wind NNW 14 mph23 km/h
Dew Point 44°F7°C
uv Index 2
Barometric Pressure 30.03 in1017 mb
POP 25% *
Humidity 81%
Thu, 24th
Princeton IL Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 62°F 17°C
Lo: 48°F 9°C
Sunrise 06:47 AM
Sunset 06:51 PM
Wind NNE 12 mph19 km/h
Dew Point 50°F10°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 13% *
Humidity 71%
Fri, 25th
Princeton IL Weather - Friday, Sep 25, 2026 - Sunny
Hi: 68°F 20°C
Lo: 48°F 9°C
Sunrise 06:48 AM
Sunset 06:50 PM
Wind ENE 6 mph10 km/h
Dew Point 49°F9°C
uv Index 5
Barometric Pressure 30.24 in1024 mb
POP 3% *
Humidity 59%
Sat, 26th
Princeton IL Weather - Saturday, Sep 26, 2026 - Sunny
Hi: 70°F 21°C
Lo: 53°F 11°C
Sunrise 06:49 AM
Sunset 06:48 PM
Wind S 3 mph5 km/h
Dew Point 52°F11°C
uv Index 5
Barometric Pressure 30.27 in1025 mb
POP 4% *
Humidity 61%
* POP = Probability of Precipitation. Data for 12:00 PM.