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Princeton IL Weather - Overcast - 57°F
Overcast
57°F
Updated 4:00 am
Feels Like 49°F
Humidity 78%
Wind N 0 mph
Barometer  30.29 in
Dew Point 51°F
Princeton IL Weather - Overcast - 14°C
Overcast
14°C
Updated 4:00 am
Feels Like 10°C
Humidity 78%
Wind N 0 km/h
Barometer  102.5 kPa
Dew Point 11°C
Princeton, IL Weather and Current Conditionsprinceton il weather forecast

Princeton, IL Weather Forecast

Princeton Illinois WeatherPrinceton, Illinois Weather Weather Forecast
14 day API forecast for Princeton, Illinois. Note. The 7-day weather forecast for Princeton, IL is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Princeton, IL Weather Forecast Dated: 400 AM Wed Sep 23 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Wednesday, September 23, 2026

Mid-Morning
Princeton Weather - 2026-09-23 - Morning - Overcast
56°F 13°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-23 - Afternoon - Overcast
66°F 19°C
Overcast
Early-Evening
Princeton Weather - 2026-09-23 - Evening - Scattered Showers
61°F 16°C
Scattered Showers
Refreshing around 66°F 19°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds out of the ENE at 11 mph 18 km/h.

Thursday, September 24, 2026

Mid-Morning
Princeton Weather - 2026-09-24 - Morning - Overcast
57°F 14°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-24 - Afternoon - Overcast
66°F 19°C
Overcast
Early-Evening
Princeton Weather - 2026-09-24 - Evening - Overcast
64°F 18°C
Overcast
Mildly cool near 66°F 19°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the E at 8 mph 13 km/h.

Friday, September 25, 2026

Mid-Morning
Princeton Weather - 2026-09-25 - Morning - Scattered Showers
58°F 14°C
Scattered Showers
Mid-Afternoon
Princeton Weather - 2026-09-25 - Afternoon - Overcast
58°F 14°C
Overcast
Early-Evening
Princeton Weather - 2026-09-25 - Evening - Overcast
57°F 14°C
Overcast
Comfortable at 58°F 14°C, locally heavy downpours at times, with steady humidity and steady pressure.

Saturday, September 26, 2026

Mid-Morning
Princeton Weather - 2026-09-26 - Morning - Overcast
55°F 13°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-26 - Afternoon - Light Showers
53°F 12°C
Light Showers
Early-Evening
Princeton Weather - 2026-09-26 - Evening - Scattered Showers
56°F 13°C
Scattered Showers
Crisp with a high near 53°F 12°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure.

Sunday, September 27, 2026

Mid-Morning
Princeton Weather - 2026-09-27 - Morning - Overcast
57°F 14°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-27 - Afternoon - Overcast
57°F 14°C
Overcast
Early-Evening
Princeton Weather - 2026-09-27 - Evening - Overcast
56°F 14°C
Overcast
Brisk around 57°F 14°C, overcast through the afternoon, turning partly cloudy this evening, with increasing humidity and steady pressure.

Monday, September 28, 2026

Mid-Morning
Princeton Weather - 2026-09-28 - Morning - Sunny
58°F 14°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-09-28 - Afternoon - Sunny
68°F 20°C
Sunny
Early-Evening
Princeton Weather - 2026-09-28 - Evening - Sunny
63°F 17°C
Sunny
Pleasant near 68°F 20°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the E to the ESE at 8 mph 12 km/h.

Tuesday, September 29, 2026

Mid-Morning
Princeton Weather - 2026-09-29 - Morning - Overcast
59°F 15°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-09-29 - Afternoon - Overcast
67°F 20°C
Overcast
Early-Evening
Princeton Weather - 2026-09-29 - Evening - Cloudy
66°F 19°C
Cloudy
Comfortable at 67°F 20°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and barometric pressure falling. Winds out of the SSE at 9 mph 15 km/h. Gusts up to 21 mph 34 km/h.

Wednesday, September 30, 2026

Mid-Morning
Princeton Weather - 2026-09-30 - Morning - Light Showers
53°F 11°C
Light Showers
Mid-Afternoon
Princeton Weather - 2026-09-30 - Afternoon - Light Showers
49°F 9°C
Light Showers
Early-Evening
Princeton Weather - 2026-09-30 - Evening - Light Showers
49°F 10°C
Light Showers
Crisp with a high near 49°F 9°C, persistent showers off and on through the day, with steady humidity and barometric pressure rising. Winds blowing from the W at 21 mph 33 km/h. Gusts up to 35 mph 56 km/h.

Thursday, October 1, 2026

Mid-Morning
Princeton Weather - 2026-10-01 - Morning - Overcast
48°F 9°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-10-01 - Afternoon - Sunny
58°F 15°C
Sunny
Early-Evening
Princeton Weather - 2026-10-01 - Evening - Sunny
54°F 12°C
Sunny
Refreshing around 58°F 15°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds decreasing from W 18 mph 29 km/h to W 9 mph 15 km/h.

Friday, October 2, 2026

Mid-Morning
Princeton Weather - 2026-10-02 - Morning - Sunny
56°F 13°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-10-02 - Afternoon - Sunny
74°F 23°C
Sunny
Early-Evening
Princeton Weather - 2026-10-02 - Evening - Sunny
69°F 20°C
Sunny
Mild with a high of 74°F 23°C, sunny through the afternoon, turning cloudy this evening, with increasing humidity and barometric pressure falling. Winds switching from the SSE to the SW at 6 mph 9 km/h.

Saturday, October 3, 2026

Mid-Morning
Princeton Weather - 2026-10-03 - Morning - Light Showers
62°F 17°C
Light Showers
Mid-Afternoon
Princeton Weather - 2026-10-03 - Afternoon - Overcast
67°F 19°C
Overcast
Early-Evening
Princeton Weather - 2026-10-03 - Evening - Sunny
59°F 15°C
Sunny
Comfortable at 67°F 19°C, scattered morning showers before drying out later, with lower humidity and steady pressure. Winds moving from the NW to the NNW at 10 mph 17 km/h. Gusts up to 21 mph 34 km/h.

Sunday, October 4, 2026

Mid-Morning
Princeton Weather - 2026-10-04 - Morning - Sunny
51°F 10°C
Sunny
Mid-Afternoon
Princeton Weather - 2026-10-04 - Afternoon - Overcast
61°F 16°C
Overcast
Early-Evening
Princeton Weather - 2026-10-04 - Evening - Partly Cloudy
57°F 14°C
Partly Cloudy
Cool with a high near 61°F 16°C, sunny in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure.

Monday, October 5, 2026

Mid-Morning
Princeton Weather - 2026-10-05 - Morning - Overcast
53°F 12°C
Overcast
Mid-Afternoon
Princeton Weather - 2026-10-05 - Afternoon - Scattered Showers
61°F 16°C
Scattered Showers
Early-Evening
Princeton Weather - 2026-10-05 - Evening - Scattered Showers
60°F 15°C
Scattered Showers
Refreshing around 61°F 16°C, periods of heavy rain and gusty conditions, with increasing humidity and steady pressure. Winds swinging from the SSE to the ENE at 9 mph 14 km/h.

Tuesday, October 6, 2026

Mid-Morning
Princeton Weather - 2026-10-06 - Morning - Light Fog
55°F 13°C
Light Fog
Mid-Afternoon
Princeton Weather - 2026-10-06 - Afternoon - Partly Cloudy
64°F 18°C
Partly Cloudy
Early-Evening
Princeton Weather - 2026-10-06 - Evening - Partly Cloudy
58°F 15°C
Partly Cloudy
Mildly cool near 64°F 18°C, partly cloudy through the afternoon, turning sunny this evening, with steady humidity and steady pressure. Winds shifting from the NE to the ENE at 9 mph 14 km/h.

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Weather by the Numbers

Wed, 23rd
Princeton IL Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 67°F 19°C
Lo: 53°F 12°C
Sunrise 06:46 AM
Sunset 06:53 PM
Wind ENE 13 mph20 km/h
Dew Point 54°F12°C
uv Index 4
Barometric Pressure 30.33 in1027 mb
POP 6% *
Humidity 72%
Thu, 24th
Princeton IL Weather - Thursday, Sep 24, 2026 - Overcast
Hi: 66°F 19°C
Lo: 54°F 12°C
Sunrise 06:47 AM
Sunset 06:51 PM
Wind E 7 mph11 km/h
Dew Point 54°F12°C
uv Index 5
Barometric Pressure 30.3 in1026 mb
POP 18% *
Humidity 74%
Fri, 25th
Princeton IL Weather - Friday, Sep 25, 2026 - Patchy Rain Nearby
Hi: 62°F 17°C
Lo: 57°F 14°C
Sunrise 06:48 AM
Sunset 06:50 PM
Wind E 9 mph14 km/h
Dew Point 49°F10°C
uv Index 5
Barometric Pressure 30.27 in1025 mb
POP 21% *
Humidity 73%
Sat, 26th
Princeton IL Weather - Saturday, Sep 26, 2026 - Light Rain Shower
Hi: 58°F 15°C
Lo: 52°F 11°C
Sunrise 06:49 AM
Sunset 06:48 PM
Wind SSE 6 mph10 km/h
Dew Point 50°F10°C
uv Index 1
Barometric Pressure 30.21 in1023 mb
POP 45% *
Humidity 92%
Sun, 27th
Princeton IL Weather - Sunday, Sep 27, 2026 - Overcast
Hi: 61°F 16°C
Lo: 52°F 11°C
Sunrise 06:50 AM
Sunset 06:46 PM
Wind E 4 mph7 km/h
Dew Point 46°F8°C
uv Index 4
Barometric Pressure 30.12 in1020 mb
POP 14% *
Humidity 59%
Mon, 28th
Princeton IL Weather - Monday, Sep 28, 2026 - Sunny
Hi: 69°F 20°C
Lo: 54°F 12°C
Sunrise 06:52 AM
Sunset 06:44 PM
Wind ESE 7 mph11 km/h
Dew Point 53°F12°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 5% *
Humidity 66%
Tue, 29th
Princeton IL Weather - Tuesday, Sep 29, 2026 - Partly Cloudy
Hi: 67°F 20°C
Lo: 56°F 13°C
Sunrise 06:53 AM
Sunset 06:43 PM
Wind SE 11 mph17 km/h
Dew Point 57°F14°C
uv Index 5
Barometric Pressure 29.83 in1010 mb
POP 18% *
Humidity 76%
Wed, 30th
Princeton IL Weather - Wednesday, Sep 30, 2026 - Patchy Rain Nearby
Hi: 62°F 17°C
Lo: 48°F 9°C
Sunrise 06:54 AM
Sunset 06:41 PM
Wind W 19 mph31 km/h
Dew Point 48°F9°C
uv Index 3
Barometric Pressure 29.65 in1004 mb
POP 45% *
Humidity 90%
Thu, 1st
Princeton IL Weather - Thursday, Oct 1, 2026 - Sunny
Hi: 59°F 15°C
Lo: 45°F 7°C
Sunrise 06:55 AM
Sunset 06:39 PM
Wind WNW 19 mph31 km/h
Dew Point 38°F4°C
uv Index 4
Barometric Pressure 29.85 in1011 mb
POP 3% *
Humidity 55%
Fri, 2nd
Princeton IL Weather - Friday, Oct 2, 2026 - Sunny
Hi: 75°F 24°C
Lo: 50°F 10°C
Sunrise 06:56 AM
Sunset 06:38 PM
Wind S 11 mph17 km/h
Dew Point 50°F10°C
uv Index 5
Barometric Pressure 29.91 in1013 mb
POP 3% *
Humidity 55%
Sat, 3rd
Princeton IL Weather - Saturday, Oct 3, 2026 - Overcast
Hi: 67°F 20°C
Lo: 53°F 11°C
Sunrise 06:57 AM
Sunset 06:36 PM
Wind NNW 9 mph15 km/h
Dew Point 54°F12°C
uv Index 4
Barometric Pressure 29.91 in1013 mb
POP 18% *
Humidity 69%
Sun, 4th
Princeton IL Weather - Sunday, Oct 4, 2026 - Sunny
Hi: 61°F 16°C
Lo: 46°F 8°C
Sunrise 06:58 AM
Sunset 06:34 PM
Wind NNW 4 mph7 km/h
Dew Point 40°F5°C
uv Index 4
Barometric Pressure 30.09 in1019 mb
POP 8% *
Humidity 54%
Mon, 5th
Princeton IL Weather - Monday, Oct 5, 2026 - Light Rain Shower
Hi: 63°F 17°C
Lo: 50°F 10°C
Sunrise 06:59 AM
Sunset 06:33 PM
Wind SE 8 mph12 km/h
Dew Point 45°F7°C
uv Index 3
Barometric Pressure 30.03 in1017 mb
POP 39% *
Humidity 65%
Tue, 6th
Princeton IL Weather - Tuesday, Oct 6, 2026 - Partly Cloudy
Hi: 65°F 18°C
Lo: 52°F 11°C
Sunrise 07:00 AM
Sunset 06:31 PM
Wind NE 9 mph15 km/h
Dew Point 51°F11°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 7% *
Humidity 69%
* POP = Probability of Precipitation. Data for 12:00 PM.