What is the weather in Princeton right now?

Current weather in Princeton is thunderstorm with rain.

Where can I find the hourly weather forecast for Princeton?

This page shows hourly weather forecast for Princeton, including temperature, wind, precipitation, humidity and cloud cover.

Is the weather forecast for Princeton updated regularly?

Weather data for Princeton is updated regularly with the latest available observations and forecasts.

Now · 4:58 AM

Princeton Weather & Hourly Forecast

United States · Illinois · 61356

72°F

Thunderstorms

Feels like: 77°F

💧 Humidity 94% 🌡 Pressure 30.00 inHg 💨 Wind 3 mph 👁 Visibility 1.7 mi ☁ Clouds 94% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Princeton

Today

5:00 AM

Thunderstorms

72° 💧 0.391 in 💨 3 mph H 94%30.00 inHg

8:00 AM

Light thunderstorms

72° 💧 0.142 in 💨 8 mph H 95%30.03 inHg

11:00 AM

Light rain

75° 💧 0.045 in 💨 9 mph H 92%30.03 inHg

2:00 PM

Partly cloudy

80° 💧 0.005 in 💨 6 mph H 77%29.97 inHg

5:00 PM

Mostly cloudy

81° 💧 0.000 in 💨 6 mph H 73%29.94 inHg

8:00 PM

Overcast night

75° 💧 None 💨 3 mph H 88%29.94 inHg

11:00 PM

Mostly clear night

71° 💧 None 💨 4 mph H 93%29.97 inHg

Tomorrow

2:00 AM

Overcast night

69° 💧 None 💨 5 mph H 93%29.97 inHg

5:00 AM

Overcast night

68° 💧 None 💨 6 mph H 83%29.97 inHg

8:00 AM

Overcast

67° 💧 None 💨 5 mph H 80%30.03 inHg

11:00 AM

Mostly cloudy

74° 💧 None 💨 5 mph H 64%30.03 inHg

2:00 PM

Partly cloudy

78° 💧 None 💨 3 mph H 49%30.00 inHg

5:00 PM

Mostly cloudy

76° 💧 None 💨 7 mph H 51%29.94 inHg

8:00 PM

Clear night

69° 💧 None 💨 1 mph H 69%29.97 inHg

11:00 PM

Clear night

65° 💧 None 💨 2 mph H 80%30.00 inHg

Friday

2:00 AM

Clear night

61° 💧 None 💨 3 mph H 88%30.00 inHg

Today

5:00 AM

Thunderstorms

72° 💧 0.166 in 💨 3 mph H 94%30.00 inHg

6:00 AM

Thunderstorms

72° 💧 0.111 in 💨 5 mph H 94%30.03 inHg

7:00 AM

Moderate rain

71° 💧 0.113 in 💨 7 mph H 95%30.00 inHg

8:00 AM

Light thunderstorms

72° 💧 0.061 in 💨 8 mph H 95%30.03 inHg

9:00 AM

Light rain

73° 💧 0.033 in 💨 7 mph H 95%30.03 inHg

10:00 AM

Light rain

75° 💧 0.047 in 💨 6 mph H 93%30.00 inHg

11:00 AM

Light rain

75° 💧 0.034 in 💨 9 mph H 92%30.03 inHg

12:00 PM

Light rain

76° 💧 0.010 in 💨 7 mph H 90%30.00 inHg

1:00 PM

Overcast

80° 💧 0.001 in 💨 8 mph H 77%30.00 inHg

2:00 PM

Partly cloudy

80° 💧 0.001 in 💨 6 mph H 77%29.97 inHg

3:00 PM

Overcast

82° 💧 0.004 in 💨 8 mph H 72%29.97 inHg

4:00 PM

Overcast

82° 💧 0.001 in 💨 7 mph H 72%29.94 inHg

5:00 PM

Mostly cloudy

81° 💧 0.000 in 💨 6 mph H 73%29.94 inHg

6:00 PM

Mostly cloudy

81° 💧 0.000 in 💨 4 mph H 76%29.94 inHg

7:00 PM

Mostly cloudy

78° 💧 None 💨 3 mph H 84%29.94 inHg

8:00 PM

Overcast night

75° 💧 None 💨 3 mph H 88%29.94 inHg

9:00 PM

Mostly cloudy night

74° 💧 None 💨 3 mph H 90%29.97 inHg

10:00 PM

Mostly cloudy night

72° 💧 None 💨 3 mph H 92%29.97 inHg

11:00 PM

Mostly clear night

71° 💧 None 💨 4 mph H 93%29.97 inHg

Tomorrow

12:00 AM

Mostly cloudy night

71° 💧 None 💨 5 mph H 93%29.97 inHg

1:00 AM

Mostly cloudy night

70° 💧 None 💨 5 mph H 93%29.97 inHg

2:00 AM

Overcast night

69° 💧 None 💨 5 mph H 93%29.97 inHg

3:00 AM

Mostly cloudy night

69° 💧 None 💨 7 mph H 91%29.97 inHg

4:00 AM

Overcast night

69° 💧 None 💨 6 mph H 88%29.97 inHg

5:00 AM

Overcast night

68° 💧 None 💨 6 mph H 83%29.97 inHg

6:00 AM

Overcast night

67° 💧 None 💨 5 mph H 83%30.00 inHg

7:00 AM

Overcast

66° 💧 None 💨 6 mph H 82%30.00 inHg

8:00 AM

Overcast

67° 💧 None 💨 5 mph H 80%30.03 inHg

9:00 AM

Overcast

69° 💧 None 💨 3 mph H 78%30.03 inHg

10:00 AM

Overcast

71° 💧 None 💨 3 mph H 73%30.03 inHg

11:00 AM

Mostly cloudy

74° 💧 None 💨 5 mph H 64%30.03 inHg

12:00 PM

Overcast

76° 💧 None 💨 5 mph H 55%30.03 inHg

1:00 PM

Mostly cloudy

77° 💧 None 💨 5 mph H 51%30.00 inHg

2:00 PM

Partly cloudy

78° 💧 None 💨 3 mph H 49%30.00 inHg

3:00 PM

Mostly cloudy

78° 💧 None 💨 4 mph H 49%29.97 inHg

4:00 PM

Mostly cloudy

78° 💧 None 💨 5 mph H 49%29.97 inHg

5:00 PM

Mostly cloudy

76° 💧 None 💨 7 mph H 51%29.94 inHg

6:00 PM

Partly cloudy

75° 💧 None 💨 5 mph H 58%29.94 inHg

7:00 PM

Sunny

72° 💧 None 💨 2 mph H 69%29.97 inHg

8:00 PM

Clear night

69° 💧 None 💨 1 mph H 69%29.97 inHg

9:00 PM

Clear night

68° 💧 None 💨 0 mph H 71%29.97 inHg

10:00 PM

Clear night

66° 💧 None 💨 1 mph H 76%30.00 inHg

11:00 PM

Clear night

65° 💧 None 💨 2 mph H 80%30.00 inHg

Friday

12:00 AM

Clear night

64° 💧 None 💨 1 mph H 81%30.00 inHg

1:00 AM

Clear night

62° 💧 None 💨 0 mph H 83%30.00 inHg

2:00 AM

Clear night

61° 💧 None 💨 3 mph H 88%30.00 inHg

3:00 AM

Clear night

60° 💧 None 💨 2 mph H 89%30.00 inHg

4:00 AM

Clear night

59° 💧 None 💨 2 mph H 91%30.00 inHg

5:00 AM

Clear night

59° 💧 0.000 in 💨 3 mph H 94%30.00 inHg

6:00 AM

Clear night

60° 💧 None 💨 3 mph H 95%30.00 inHg

7:00 AM

Sunny

60° 💧 None 💨 4 mph H 95%30.03 inHg

8:00 AM

Sunny

63° 💧 None 💨 5 mph H 90%30.03 inHg

9:00 AM

Sunny

67° 💧 None 💨 4 mph H 82%30.00 inHg

10:00 AM

Sunny

71° 💧 None 💨 6 mph H 71%30.00 inHg

11:00 AM

Sunny

74° 💧 None 💨 7 mph H 60%30.00 inHg

12:00 PM

Sunny

76° 💧 None 💨 8 mph H 53%29.97 inHg

1:00 PM

Sunny

77° 💧 None 💨 8 mph H 50%29.97 inHg

2:00 PM

Sunny

78° 💧 None 💨 8 mph H 48%29.94 inHg

3:00 PM

Sunny

78° 💧 None 💨 7 mph H 48%29.91 inHg

4:00 PM

Sunny

78° 💧 None 💨 6 mph H 48%29.88 inHg

5:00 PM

Sunny

78° 💧 None 💨 6 mph H 51%29.88 inHg

6:00 PM

Sunny

76° 💧 None 💨 4 mph H 60%29.85 inHg

7:00 PM

Sunny

72° 💧 None 💨 4 mph H 70%29.85 inHg

10:00 PM

Mostly clear night

68° 💧 None 💨 7 mph H 76%29.88 inHg

Saturday

1:00 AM

Mostly cloudy night

66° 💧 None 💨 8 mph H 80%29.85 inHg

4:00 AM

Mostly clear night

66° 💧 None 💨 7 mph H 90%29.85 inHg

7:00 AM

Partly cloudy

66° 💧 None 💨 8 mph H 95%29.85 inHg

10:00 AM

Partly cloudy

77° 💧 None 💨 9 mph H 80%29.88 inHg

1:00 PM

Overcast

83° 💧 None 💨 8 mph H 65%29.85 inHg

4:00 PM

Light rain

84° 💧 None 💨 8 mph H 64%29.85 inHg

7:00 PM

Mostly sunny

78° 💧 None 💨 6 mph H 77%29.88 inHg

10:00 PM

Clear night

73° 💧 None 💨 2 mph H 91%29.94 inHg

Sunday

1:00 AM

Mostly clear night

70° 💧 None 💨 2 mph H 96%29.97 inHg

4:00 AM

Mostly clear night

69° 💧 None 💨 6 mph H 95%29.97 inHg

7:00 AM

Overcast

68° 💧 None 💨 7 mph H 86%30.00 inHg

10:00 AM

Partly cloudy

76° 💧 None 💨 5 mph H 74%30.03 inHg

1:00 PM

Mostly cloudy

84° 💧 None 💨 7 mph H 64%29.97 inHg

4:00 PM

Partly cloudy

86° 💧 None 💨 7 mph H 58%29.91 inHg

7:00 PM

Mostly sunny

81° 💧 None 💨 5 mph H 73%29.91 inHg

10:00 PM

Clear night

77° 💧 None 💨 8 mph H 83%29.91 inHg

Monday

1:00 AM

Mostly cloudy night

76° 💧 None 💨 9 mph H 83%29.91 inHg

4:00 AM

Mostly cloudy night

75° 💧 None 💨 10 mph H 75%29.91 inHg

7:00 AM

Mostly cloudy

74° 💧 None 💨 11 mph H 78%29.91 inHg

10:00 AM

Overcast

81° 💧 None 💨 11 mph H 70%29.91 inHg

1:00 PM

Sunny

89° 💧 None 💨 14 mph H 58%29.88 inHg

4:00 PM

Sunny

91° 💧 None 💨 16 mph H 51%29.80 inHg

7:00 PM

Sunny

85° 💧 None 💨 13 mph H 60%29.77 inHg

Tuesday

1:00 AM

Light rain

73° 💧 None 💨 7 mph H 94%29.88 inHg

7:00 AM

Overcast

65° 💧 None 💨 12 mph H 90%30.06 inHg

1:00 PM

Mostly sunny

72° 💧 None 💨 7 mph H 61%30.15 inHg

7:00 PM

Mostly cloudy

69° 💧 None 💨 6 mph H 65%30.15 inHg

Wednesday

1:00 AM

Mostly clear night

62° 💧 None 💨 6 mph H 85%30.27 inHg

7:00 AM

Overcast

59° 💧 None 💨 7 mph H 85%30.30 inHg

1:00 PM

Overcast

70° 💧 None 💨 7 mph H 65%30.27 inHg

7:00 PM

Sunny

68° 💧 None 💨 7 mph H 69%30.21 inHg

Thursday

1:00 AM

Clear night

62° 💧 None 💨 8 mph H 86%30.21 inHg

7:00 AM

Sunny

62° 💧 None 💨 7 mph H 87%30.18 inHg

1:00 PM

Partly cloudy

81° 💧 None 💨 9 mph H 57%30.12 inHg

7:00 PM

Mostly cloudy

78° 💧 None 💨 8 mph H 72%30.03 inHg

Friday

1:00 AM

Overcast night

74° 💧 None 💨 6 mph H 83%30.03 inHg

7:00 AM

Mostly sunny

71° 💧 None 💨 5 mph H 97%30.06 inHg

1:00 PM

Overcast

82° 💧 None 💨 4 mph H 74%30.03 inHg

7:00 PM

Moderate rain

78° 💧 None 💨 6 mph H 84%30.00 inHg

Saturday

1:00 AM

Partly cloudy night

69° 💧 None 💨 11 mph H 93%30.00 inHg

7:00 AM

Mostly cloudy

66° 💧 None 💨 12 mph H 89%29.94 inHg

1:00 PM

Sunny

88° 💧 None 💨 10 mph H 63%29.80 inHg

7:00 PM

Sunny

84° 💧 None 💨 8 mph H 70%29.68 inHg

Sunday

1:00 AM

Mostly cloudy night

76° 💧 None 💨 9 mph H 81%29.68 inHg

7:00 AM

Overcast

71° 💧 None 💨 8 mph H 97%29.77 inHg

1:00 PM

Overcast

76° 💧 None 💨 9 mph H 52%29.83 inHg

7:00 PM

Sunny

69° 💧 None 💨 7 mph H 67%29.85 inHg

Monday

1:00 AM

Clear night

61° 💧 None 💨 5 mph H 91%29.94 inHg

7:00 AM

Overcast

56° 💧 None 💨 4 mph H 92%30.00 inHg

1:00 PM

Overcast

71° 💧 None 💨 5 mph H 58%30.03 inHg

7:00 PM

Partly cloudy night

66° 💧 None 💨 4 mph H 71%30.00 inHg

Tuesday

1:00 AM

Mostly clear night

63° 💧 None 💨 11 mph H 81%30.00 inHg

7:00 AM

Mostly sunny

61° 💧 None 💨 8 mph H 92%30.03 inHg

1:00 PM

Partly cloudy

77° 💧 None 💨 11 mph H 52%30.09 inHg

7:00 PM

Clear night

70° 💧 None 💨 6 mph H 70%30.09 inHg

Wednesday

1:00 AM

Overcast night

65° 💧 None 💨 6 mph H 82%30.12 inHg

7:00 AM

Overcast

65° 💧 None 💨 3 mph H 84%30.15 inHg

1:00 PM

Partly cloudy

78° 💧 None 💨 0 mph H 56%30.12 inHg

7:00 PM

Mostly clear night

73° 💧 None 💨 4 mph H 70%30.00 inHg

In Princeton and, more broadly, across the state of Illinois: Tonight, expect mostly cloudy skies with temperatures remaining mild to warm, ranging from 84 to 85 degrees Fahrenheit. Winds will be moderate from the southeast at around 10 mph, with occasional gusts reaching up to 21 mph. No rain is expected during the evening and the upcoming hours, so outdoor plans should be comfortable. The breeze might make it feel a bit cooler at times, but overall conditions will stay pleasant. Temperatures will gradually remain steady through the night, providing a mild and calm evening. It's a good evening to enjoy outdoor activities or relax under the partly cloudy sky.

15-Day Weather Outlook for Princeton

TomorrowTomorrow

Mostly cloudy 78°/66° 💧 None 💨 7 mph

Friday, Sep 11Fri Sep 11

Sunny 78°/59° 💧 None 💨 8 mph

Saturday, Sep 12Sat Sep 12

Light rain 84°/66° 💧 0.512 in 💨 9 mph

Sunday, Sep 13Sun Sep 13

Mostly cloudy 86°/68° 💧 0.017 in 💨 7 mph

Monday, Sep 14Mon Sep 14

Mostly sunny 91°/74° 💧 None 💨 16 mph

Tuesday, Sep 15Tue Sep 15

Light rain 85°/65° 💧 0.211 in 💨 13 mph

Wednesday, Sep 16Wed Sep 16

Mostly cloudy 70°/59° 💧 0.002 in 💨 7 mph

Thursday, Sep 17Thu Sep 17

Partly cloudy 81°/62° 💧 0.001 in 💨 9 mph

Friday, Sep 18Fri Sep 18

Mostly cloudy 82°/71° 💧 0.315 in 💨 8 mph

Saturday, Sep 19Sat Sep 19

Moderate rain 88°/66° 💧 0.151 in 💨 12 mph

Sunday, Sep 20Sun Sep 20

Mostly cloudy 84°/71° 💧 0.182 in 💨 9 mph

Monday, Sep 21Mon Sep 21

Overcast 71°/56° 💧 None 💨 7 mph

Tuesday, Sep 22Tue Sep 22

Partly cloudy 77°/61° 💧 0.009 in 💨 11 mph

Wednesday, Sep 23Wed Sep 23

Overcast 78°/65° 💧 None 💨 6 mph

Thursday, Sep 24Thu Sep 24

Mostly sunny 73°/73° 💧 None 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Princeton

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Princeton

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 5:00 AM

PM2.5 Fine particles Good 9,6µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 10,7µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 70,0µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 3,4µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Princeton

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 3,8Moderate 🙂Fair

Tomorrow UV 6,1High 🙂Fair

Friday UV 6,6High 😐Moderate

Saturday UV 4,9Moderate 🙂Fair

Sunday UV 6,0High 😊Good

Monday UV 6,0High —Unavailable

Tuesday UV 6,0High —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,4 9:00 AMUV 1,6 10:00 AMUV 3,1 11:00 AMUV 3,8 12:00 PMUV 1,4 1:00 PMUV 0,9 2:00 PMUV 1,7 3:00 PMUV 1,3 4:00 PMUV 0,8 5:00 PMUV 0,5 6:00 PMUV 0,4

Today's weather health advice Open today's recommendations.

Moderate UV risk

Sunglasses and sun protection are recommended for prolonged exposure.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Princeton

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · PRINCETON, ILLINOIS

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 11:00 PM–12:00 AM.

81/100Best-hour score

BEST TIME TONIGHT 11:00 PM–12:00 AM Astronomical darkness: 8:53 PM–4:58 AM

☁ Cloud cover 22% Real hourly forecast for the best viewing hour.

☾ Moonlight 3% New Moon · Moon below the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 26° high at the best hour.

✦ Estimated visible meteors 0–2/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min45%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

DISCOVER WEATHER NEARBY Weather in other cities

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Forecast data for Princeton were last refreshed today at 4:58 AM. The current forecast period extends through 11/09/2026 at 2:00 AM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.