Marcus, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Marcus, IL in one place.
A slight chance of rain showers. Cloudy, with a low around 54. East wind around 5 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Marcus, IL is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 15, 2026 7:10 AM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Marcus, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 7:10 AM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Marcus
Wednesday looks like the warmest upcoming period in Marcus at 71 degrees F.
Friday Night is the coolest period ahead with temperatures near 32 degrees F.
The strongest winds are forecast for Friday at about 15 to 20 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 7:10 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KDVN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain showers before 4pm, then showers and thunderstorms. Cloudy, with a high near 58. East wind around 5 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely before 1am. Mostly cloudy, with a low around 44. Northwest wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
A chance of rain showers between 10am and 2pm. Partly sunny, with a high near 53. Northwest wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%.
Widespread frost after 2am. Mostly clear, with a low around 32.
Widespread frost before 9am. Sunny, with a high near 56.
Clear, with a low around 38.
Sunny, with a high near 64.
Mostly clear, with a low around 41.
Mostly sunny, with a high near 66.
Partly cloudy, with a low around 42.
Sunny, with a high near 69.
Mostly clear, with a low around 45.
Mostly sunny, with a high near 71.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 15
|
Slight Chance Rain Showers
|
54°F |
5 mph
E
|
|
Thursday
Oct 15
|
Rain Showers
|
58°F |
5 mph
E
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms Likely
|
44°F |
5 to 15 mph
NW
|
|
Friday
Oct 16
|
Chance Rain Showers
|
53°F |
15 to 20 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear then Widespread Frost
|
32°F |
0 to 15 mph
N
|
|
Saturday
Oct 17
|
Widespread Frost then Sunny
|
56°F |
0 to 5 mph
W
|
|
Saturday Night
Oct 17
|
Clear
|
38°F |
5 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
64°F |
5 to 10 mph
SW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
41°F |
0 to 5 mph
S
|
|
Monday
Oct 19
|
Mostly Sunny
|
66°F |
0 to 5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
42°F |
0 mph
|
|
Tuesday
Oct 20
|
Sunny
|
69°F |
0 to 5 mph
SE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
45°F |
0 mph
|
|
Wednesday
Oct 21
|
Mostly Sunny
|
71°F |
0 to 5 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marcus.