Farmington, IL Weather Forecast
Local 7-day forecast
Patchy Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Farmington, IL in one place.
Patchy fog before 8am. Sunny, with a high near 92. Heat index values as high as 101. West northwest wind around 1 mph.
Local Weather Overview
This forecast page for Farmington, 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 14, 2026 9:35 PM CDT.
The active forecast window currently covers Jul 15 to Jul 21, 2026 for Farmington, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 14, 2026 9:35 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Farmington
Wednesday looks like the warmest upcoming period in Farmington at 92 degrees F.
Monday Night is the coolest period ahead with temperatures near 70 degrees F.
The strongest winds are forecast for Tuesday at about 7 to 12 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 9:35 PM CDT
- Coverage
- 7 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
Mostly clear, with a low around 72. Heat index values as high as 100. South southeast wind around 1 mph.
A chance of showers and thunderstorms after 1pm. Sunny, with a high near 91. Heat index values as high as 100. South wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 73. South wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
A chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 90. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 73. Southwest wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Sunny, with a high near 91.
Mostly clear, with a low around 72.
Sunny, with a high near 89.
Mostly clear, with a low around 71.
A slight chance of showers and thunderstorms after 7am. Mostly sunny, with a high near 90.
A slight chance of rain showers. Mostly clear, with a low around 70.
A slight chance of rain showers before 7am, then a slight chance of showers and thunderstorms between 7am and 1pm. Mostly sunny, with a high near 86.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Patchy Fog then Sunny
|
92°F |
1 mph
WNW
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
72°F |
1 mph
SSE
|
|
Thursday
Jul 16
|
Sunny then Chance Showers And Thunderstorms
|
91°F |
2 mph
S
|
|
Thursday Night
Jul 16
|
Chance Showers And Thunderstorms then Mostly Clear
|
73°F |
2 mph
S
|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
90°F |
5 mph
SW
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
73°F |
6 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
91°F |
6 to 9 mph
WSW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
72°F |
6 mph
W
|
|
Sunday
Jul 19
|
Sunny
|
89°F |
6 mph
WNW
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
71°F |
6 mph
SSW
|
|
Monday
Jul 20
|
Slight Chance Showers And Thunderstorms
|
90°F |
6 to 9 mph
WSW
|
|
Monday Night
Jul 20
|
Slight Chance Rain Showers
|
70°F |
8 mph
WNW
|
|
Tuesday
Jul 21
|
Slight Chance Showers And Thunderstorms
|
86°F |
7 to 12 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Farmington.
