Monticello, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Monticello, IL in one place.
Rain showers likely before 7am, then showers and thunderstorms. Mostly cloudy, with a high near 76. South southeast wind around 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Monticello, 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 13, 2026 10:27 PM CDT.
The active forecast window currently covers Oct 15 to Oct 20, 2026 for Monticello, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 13, 2026 10:27 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Monticello
Thursday looks like the warmest upcoming period in Monticello at 76 degrees F.
Friday Night is the coolest period ahead with temperatures near 34 degrees F.
The strongest winds are forecast for Friday at about 22 to 25 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 13, 2026 10:27 PM CDT
- Coverage
- 6 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms before 1am. Mostly cloudy, with a low around 47. West northwest wind 10 to 21 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly sunny, with a high near 59. Northwest wind 22 to 25 mph, with gusts as high as 35 mph.
Areas of frost after 5am. Mostly clear, with a low around 34. North wind 5 to 18 mph, with gusts as high as 24 mph.
Areas of frost before 8am. Sunny, with a high near 61.
Clear, with a low around 37.
Sunny, with a high near 67.
Partly cloudy, with a low around 45.
Partly sunny, with a high near 69.
Mostly cloudy, with a low around 47.
Mostly sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Showers And Thunderstorms
|
76°F |
10 mph
SSE
|
|
Thursday Night
Oct 15
|
Showers And Thunderstorms
|
47°F |
10 to 21 mph
WNW
|
|
Friday
Oct 16
|
Mostly Sunny
|
59°F |
22 to 25 mph
NW
|
|
Friday Night
Oct 16
|
Mostly Clear then Areas Of Frost
|
34°F |
5 to 18 mph
N
|
|
Saturday
Oct 17
|
Areas Of Frost then Sunny
|
61°F |
5 mph
E
|
|
Saturday Night
Oct 17
|
Clear
|
37°F |
7 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
67°F |
7 to 12 mph
S
|
|
Sunday Night
Oct 18
|
Partly Cloudy
|
45°F |
10 mph
S
|
|
Monday
Oct 19
|
Partly Sunny
|
69°F |
9 mph
SSW
|
|
Monday Night
Oct 19
|
Mostly Cloudy
|
47°F |
6 mph
S
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
75°F |
3 to 7 mph
SSE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Monticello.
