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Weather Conditions for Onarga, Illinois : Iroquois County
Issued: 5:45 am CDT Sep 16, 2026 Latitude: 40.715035 Longitude: -88.0061509 View on Google Maps

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Today Tonight Thursday Friday Saturday Sunday Monday Tuesday
90% chance of thunderstorms on Today 70% chance of thunderstorms on Tonight 60% chance of thunderstorms on Thursday Mostly Sunny on Friday 40% chance of thunderstorms on Saturday 20% chance of thunderstorms on Sunday 20% chance of rain on Monday 20% chance of  on Tuesday
High: 83°F Low: 68°F High: 83°F High: 82°F High: 88°F High: 80°F High: 78°F High: 76°F
Low: 64°F Low: 65°F Low: 66°F Low: 62°F Low: 59°F  
Thunderstorms Thunderstorms Thunderstorms Mostly Sunny Thunderstorms Thunderstorms Rain Partly Sunny
Current Conditions at
KANKAKEE - (KIKK)
73°
Cloudy
as of 9:55 AM CDST
Rel. Humidity: 94%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: IFR
Wind Data
3 MPH
080° East
Cloud Level(s): Solid Overcast at 500ft
Current Conditions at
RANTOUL - (KTIP)
73°
Mostly Cloudy
as of 9:55 AM CDST
Rel. Humidity: 100%
Dew Point: 73°F
Visibility: 7 Miles
Pressure: 30.27 in.
Flight Rule: IFR
Wind Data
6 MPH
140° Southeast
Cloud Level(s): Broken at 500ft, Broken at 12000ft
Current Conditions at
PONTIAC MUNICIPAL AIRPT - (KPNT)
73°
Cloudy
as of 9:55 AM CDST
Rel. Humidity: 94%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 30.28 in.
Flight Rule: IFR
Wind Data
6 MPH
070° East
Cloud Level(s): Solid Overcast at 700ft
90% chance of thunderstorms Today Today... Showers and possibly a thunderstorm before 11am, then a slight chance of showers between 11am and 1pm, then a chance of showers and thunderstorms after 1pm. High near 83. Calm wind. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

70% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

60% chance of thunderstorms Thursday Thursday... Showers likely and possibly a thunderstorm before 10am, then a chance of showers between 10am and 1pm. Mostly cloudy, with a high near 83. Calm wind becoming west northwest around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 64. North wind around 5 mph becoming calm.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 82. Calm wind becoming east around 5 mph in the morning.

30% chance of thunderstorms Friday Night Friday Night... A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.

40% chance of thunderstorms Saturday Saturday... A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. Chance of precipitation is 40%.

Thunderstorms on Saturday Night Saturday Night... Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 66.

20% chance of thunderstorms Sunday Sunday... A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80.

20% chance of rain Sunday Night Sunday Night... A chance of showers. Mostly cloudy, with a low around 62.

20% chance of rain Monday Monday... A chance of showers. Mostly cloudy, with a high near 78.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 59.

20% chance of  Tuesday Tuesday... A chance of showers. Partly sunny, with a high near 76.

Illinois' Warnings, Watches, and AdvisoriesIllinois' Watches, Warnings, and Advisories

Sun Almanac for Onarga, Illinois
Astronomical Sunrise 05:01 AM?Astronomical sunrise occurs when the Sun is 18° below the horizon and the sky begins to brighten from a completly darkened state.
Nautical Sunrise 05:34 AM?Nautical sunrise (or nautical dawn) is the precise moment when the sun's center is 12° below the horizon in the morning. It marks the beginning of nautical twilight, allowing pilots/mariners to see the horizon.
Civil Sunrise 06:07 AM?Civil sunrise is the moment in the morning when the sun's center is 6° below the horizon. It marks the start of morning civil twilight, providing enough natural light for most, outdoor activities without artificial lighting. It typically occurs roughly 20-30 minutes before actual sunrise.
Sunrise 06:34 AM?Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning. It marks the end of the twilight phase, often accompanied by distinct atmospheric colors.

Daylight: 12 Hours 26 Minutes?Daylight hours are the period of time between local sunrise and sunset, representing the daily portion of sunlight. These hours change in length based on season, Earth's tilt, and latitude.

Sunset 7:00 PM?The sunset is defined in astronomy as the moment the upper limb of the Sun disappears below the horizon. It marks the end of daylight and is often accompanied by distinct atmospheric colors. It also signals the beginning of twilight.
Civil Sunset 7:27 PM?Civil sunset (or evening civil twilight) occurs when the center of the sun is 6° below the horizon, marking the end of the brightest twilight phase. It typically occurs roughly 20-30 minutes after sunset, providing enough light for most outdoor activities to continue without artificial light.
Nautical Sunset 7:59 PM?Nautical sunset occurs when the sun's center is 12° below the horizon, marking the end of nautical twilight. This phase, following civil twilight, allows the horizon to remain visible, enabling mariners to take accurate star sights for navigation. The sky is dark, but some ambient light remains
Astronomical Sunset 8:32 PM?Astronomical sunrise occurs when the Sun drops to 18° below the horizon. This causes the sky to enter a completly darkened state.

Civil Rise to Set: 13 Hours 20 Minutes
Nautical Rise to Set: 14 Hours 25 Minutes
Astro Rise to Set: 15 Hours 31 Minutes

Click for yearly Sun Almanac for Onarga
Moon Almanac for Onarga, Illinois
Moon Phase: Waxing Crescent
Moon Illumination: 29%
Moon Age: 5.39 Days
Moon is currently below the horizon
Distance from Moon to Earth: 249,964 miles
Upcoming Lunar Events for
Onarga:
Next EventEvent TimeIllum

Moonrise:12:35 pm Wed29.8%
High Moon:05:07 pm Wed31.4%
Moonset:09:35 pm Wed33.1%
New Moon: Thu Sep 10
First Quarter: Fri Sep 18
Full Moon: Sat Sep 26
Last Quarter: Sat Oct 3
New Moon: Sat Oct 10
Click for Monthly Moon Almanac