No Watches or Warnings for Forsyth
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Weather Conditions for Forsyth, Illinois : Macon County
Issued: 12:36 pm CDT Sep 14, 2026 Latitude: 39.9325368 Longitude: -88.9511912 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
Mostly Sunny on This Afternoon Mostly Clear on Tonight 40% chance of thunderstorms on Tuesday 60% chance of  on Wednesday Mostly Sunny on Thursday Partly Sunny on Friday 20% chance of rain on Saturday Partly Sunny on Sunday
High: 81°F Low: 69°F High: 94°F High: 90°F High: 90°F High: 88°F High: 87°F High: 82°F
Low: 68°F Low: 72°F Low: 68°F Low: 68°F Low: 64°F  
Mostly Sunny Mostly Clear Thunderstorms Partly Sunny Mostly Sunny Partly Sunny Rain Partly Sunny
Current Conditions at
LOGAN COUNTY AIRPORT - (KAAA)
73°
Mostly Cloudy
as of 12:35 PM CDST
Rel. Humidity: 40%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.19 in.
Flight Rule: VFR
Wind Data
10 MPH
Gust: 17 MPH
150° Southeast
Cloud Level(s): Broken at 8500ft, Broken at 11000ft
Mostly Sunny on This Afternoon This Afternoon... Mostly sunny, with a high near 81. Southeast wind 10 to 13 mph, with gusts as high as 16 mph.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 69. Southeast wind 10 to 13 mph, with gusts as high as 21 mph.

40% chance of thunderstorms Tuesday Tuesday... A chance of showers, with thunderstorms also possible after 4pm. Mostly sunny, with a high near 94. Heat index values as high as 100. Southwest wind 10 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.

60% chance of thunderstorms Tuesday Night Tuesday Night... A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 10pm, then showers likely after 10pm. Mostly cloudy, with a low around 68. North northwest wind 6 to 8 mph becoming east northeast after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

60% chance of  Wednesday Wednesday... Showers likely before 1pm. Partly sunny, with a high near 90. East northeast wind around 8 mph becoming southeast in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 72. East wind 6 to 9 mph becoming south southwest after midnight.

Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 90. South southwest wind around 9 mph becoming west northwest in the afternoon.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 68.

Partly Sunny on Friday Friday... Partly sunny, with a high near 88.

Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 68.

20% chance of rain Saturday Saturday... A chance of showers. Mostly sunny, with a high near 87.

20% chance of rain Saturday Night Saturday Night... A chance of showers. Partly cloudy, with a low around 64.

Partly Sunny on Sunday Sunday... Partly sunny, with a high near 82.

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

Sun Almanac for Forsyth, Illinois
Astronomical Sunrise 05:04 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 05:37 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 06:09 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 06:36 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 30 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 7:06 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 7:34 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 8:06 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 8:38 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 25 Minutes
Nautical Rise to Set: 14 Hours 29 Minutes
Astro Rise to Set: 15 Hours 34 Minutes

Click for yearly Sun Almanac for Forsyth
Moon Almanac for Forsyth, Illinois
Moon Phase: Waxing Crescent
Moon Illumination: 14%
Moon Age: 3.63 Days
Moon is currently above the horizon
Distance from Moon to Earth: 246,128 miles
Upcoming Lunar Events for
Forsyth:
Next EventEvent TimeIllum

High Moon:03:34 pm Mon14.5%
Moonset:08:34 pm Mon16.0%
Moonrise:11:32 am Tue20.9%
High Moon:04:21 pm Tue22.5%
Moonset:09:05 pm Tue24.2%
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