Grantfork, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Grantfork, IL in one place.
Showers and thunderstorms. Partly sunny. High near 60, with temperatures falling to around 55 in the afternoon. Northwest wind 15 to 18 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Grantfork, 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: Apr 16, 2026 4:12 PM CDT.
The active forecast window currently covers Apr 18 to Apr 22, 2026 for Grantfork, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 4:12 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grantfork
Tuesday looks like the warmest upcoming period in Grantfork at 77 degrees F.
Saturday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Saturday at about 15 to 18 mph NW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 4:12 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers before 7pm. Mostly clear, with a low around 37. Chance of precipitation is 30%.
Sunny, with a high near 63.
Mostly clear, with a low around 40.
Sunny, with a high near 70.
Mostly clear, with a low around 51.
Sunny, with a high near 77.
Partly cloudy, with a low around 55.
Sunny, with a high near 77.
A slight chance of rain showers after 1am. Mostly clear, with a low around 56. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Showers And Thunderstorms
|
60°F |
15 to 18 mph
NW
|
|
Saturday Night
Apr 18
|
Chance Rain Showers then Mostly Clear
|
37°F |
6 to 15 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
63°F |
6 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
40°F |
3 to 9 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
70°F |
3 to 9 mph
SE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
51°F |
9 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
77°F |
9 to 16 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
55°F |
6 to 12 mph
SW
|
|
Wednesday
Apr 22
|
Sunny
|
77°F |
6 to 10 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear then Slight Chance Rain Showers
|
56°F |
8 mph
S
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grantfork.