Grafton, IL Weather Forecast
Local 7-day forecast
Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grafton, IL in one place.
Sunny, with a high near 93.
Local Weather Overview
This forecast page for Grafton, 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: Jul 13, 2026 10:23 AM CDT.
The active forecast window currently covers Jul 16 to Jul 19, 2026 for Grafton, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 16 to Jul 19, 2026
- Latest sync
- Jul 13, 2026 10:23 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grafton
Saturday looks like the warmest upcoming period in Grafton at 95 degrees F.
Thursday Night is the coolest period ahead with temperatures near 74 degrees F.
The strongest winds are forecast for Saturday at about 6 to 10 mph SW.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 13, 2026 10:23 AM CDT
- Coverage
- 4 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
Mostly clear, with a low around 74.
Sunny, with a high near 94.
Mostly clear, with a low around 76.
Sunny, with a high near 95.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 75. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 7am. Sunny, with a high near 93. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms after 1am. Mostly clear, with a low around 74. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Jul 16
|
Sunny
|
93°F |
0 to 5 mph
SW
|
|
Thursday Night
Jul 16
|
Mostly Clear
|
74°F |
3 mph
S
|
|
Friday
Jul 17
|
Sunny
|
94°F |
2 to 8 mph
SW
|
|
Friday Night
Jul 17
|
Mostly Clear
|
76°F |
5 to 8 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
95°F |
6 to 10 mph
SW
|
|
Saturday Night
Jul 18
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
75°F |
6 to 9 mph
SW
|
|
Sunday
Jul 19
|
Slight Chance Showers And Thunderstorms then Sunny
|
93°F |
7 to 10 mph
SW
|
|
Sunday Night
Jul 19
|
Mostly Clear then Slight Chance Showers And Thunderstorms
|
74°F |
5 to 8 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grafton.
