Rantoul

Johnson County, Illinois, United States

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Current Weather

22°

Light Rain and Humid

Feels Like: 21°

Min: 22°

Max: 29°

The next few hours will be possible light rain and humid, with today reaching 29°C and dropping to 22°C. The coming days will be partly cloudy throughout the day.

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Compare today's weather with yesterday's data and track temperature trends over time.

Hourly Forecast

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Today
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Daylight Hours

06:40

Sunrise

18:52

Sunset

12 hours 12 minutes of sunlight today

Moon

Waxing Crescent

12:33

Moonrise

21:00

Moonset

Daily Forecast

Today

22°
29°

Thursday

21°
28°

Friday

19°
28°

Saturday

20°
31°

Sunday

19°
26°

Monday

18°
24°

Tuesday

16°
23°

Wednesday

16°
24°

Thursday

15°
23°

Friday

16°
21°

Air Quality Data Available

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UV Index

No protection needed
0 Low
Low Extreme

Humidity

97% Very Humid
Low High

Weather in Rantoul today, September 16, 2026

Rantoul looks cloudy on September 16, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. Expect a grey start, with morning cloud around 100% by 07:00. Outdoor plans early on should not rely on bright skies.

Temperatures climb from an overnight low near 22°C toward a daytime high of about 29°C. Expect humidity between 71% and 97%, most humid near 07:00. A lighter breeze peaks around 06:00 near 5.4 km/h.

Afternoon skies stay clogged, peaking close to 100% near 12:00. The grey theme continues rather than clearing out. Visibility holds near 14.0 km, though it can fall to 3.8 km. Daylight runs from 06:40 to 18:52, lasting 12 hours 12 minutes of sunlight today.

In short, cloud leads the story in Rantoul on September 16, 2026; expect limited sun and a peak around 29°C.

Frequently asked questions about weather in Rantoul

How warm does it get in Rantoul?

The warmest month in Rantoul is July, with average high temperatures of 29°C. The average temperature during this period is around 25°C.

How cold does it get in Rantoul?

The coldest month in Rantoul is January, with average low temperatures of -5°C. The average temperature during this period is around -2°C.

What is the wettest time of year in Rantoul?

The wettest month in Rantoul is April, with an average of 122mm of precipitation.

What is the driest time of year in Rantoul?

The driest month in Rantoul is December, with an average of 62mm of precipitation.

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Metric (°C, km/h)