Click for Hazardous Weather Outlook for New Dennison, Illinois
Click for Heat Advisory for New Dennison, Illinois
Change location by the zip code or city,state: or search for other weather forecast locations in Illinois by name.
Weather Conditions for New Dennison, Illinois : Williamson County
Issued: 8:16 pm CDT Sep 16, 2026 Latitude: 37.6928276 Longitude: -88.8556215 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Mostly Clear on Tonight Sunny on Thursday Sunny on Friday Sunny on Saturday Mostly Sunny on Sunday 10% chance of thunderstorms on Monday 10% chance of rain on Tuesday 10% chance of rain on Wednesday
Low: 74°F High: 99°F High: 97°F High: 98°F High: 96°F High: 92°F High: 86°F High: 85°F
Low: 74°F Low: 72°F Low: 73°F Low: 70°F Low: 66°F Low: 63°F  
Mostly Clear Sunny Sunny Sunny Mostly Sunny Thunderstorms Rain Rain
Current Conditions at
MARION - (KMWA)
84°
Clear
as of 8:15 PM CDST
Rel. Humidity: 58%
Dew Point: 68°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
3 MPH
210° Southwest
Cloud Level(s): Clear
Current Conditions at
HARRISBURG-RALEIGH - (KHSB)
81°
Clear
as of 8:15 PM CDST
Rel. Humidity: 74%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
CARBONDALE - (KMDH)
84°
Clear
as of 7:49 PM CDST
Rel. Humidity: 62%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: VFR
Wind Data
5 MPH
140° Southeast
Cloud Level(s): Clear
Current Conditions at
METROPOLIS MUNI ARP - (KM30)
77°
Clear
as of 8:15 PM CDST
Rel. Humidity: 88%
Dew Point: 73°F
Visibility: 10 Miles
Pressure: 30.24 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Mostly Clear on Tonight Tonight... Mostly clear, with a low around 74. Calm wind.

Sunny on Thursday Thursday... Sunny and hot, with a high near 99. Light and variable wind becoming west 5 to 7 mph in the morning.

Mostly Clear on Thursday Night Thursday Night... Mostly clear, with a low around 74. Calm wind.

Sunny on Friday Friday... Sunny and hot, with a high near 97. Light and variable wind.

Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 72. Calm wind.

Sunny on Saturday Saturday... Sunny and hot, with a high near 98. Calm wind becoming west southwest 5 to 9 mph in the morning.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 73. Light south wind.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 96. West wind 3 to 7 mph.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 70. Calm wind.

10% chance of thunderstorms Monday Monday... A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 92. Light and variable wind becoming west 5 to 8 mph in the morning.

20% chance of thunderstorms Monday Night Monday Night... A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Light north wind.

10% chance of rain Tuesday Tuesday... A slight chance of showers. Mostly sunny, with a high near 86. North northwest wind 3 to 8 mph.

Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 63. North wind around 5 mph becoming calm in the evening.

10% chance of rain Wednesday Wednesday... A slight chance of showers. Mostly sunny, with a high near 85. North wind 3 to 8 mph.

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

Current Radar Image


Sun Almanac for New Dennison, Illinois
Astronomical Sunrise 05:10 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 05:41 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 06:12 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 06:38 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 24 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 7:02 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 7:28 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 8:30 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 16 Minutes
Nautical Rise to Set: 14 Hours 18 Minutes
Astro Rise to Set: 15 Hours 20 Minutes

Click for yearly Sun Almanac for New Dennison
Moon Almanac for New Dennison, Illinois
Moon Phase: Waxing Crescent
Moon Illumination: 33%
Moon Age: 5.77 Days
Moon is currently above the horizon
Distance from Moon to Earth: 250,563 miles
Upcoming Lunar Events for
New Dennison:
Next EventEvent TimeIllum

Moonset:09:50 pm Wed33.2%
Moonrise:01:27 pm Thu39.2%
High Moon:06:01 pm Thu41.0%
Moonset:10:34 pm Thu42.8%
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