Fillmore, IL Weather Forecast
Local 7-day forecast
Slight Chance Rain Showers then Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Fillmore, IL in one place.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 75. Southwest wind 7 to 10 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Fillmore, 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 21, 2026 9:55 PM CDT.
The active forecast window currently covers Apr 22 to Apr 28, 2026 for Fillmore, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 22 to Apr 28, 2026
- Latest sync
- Apr 21, 2026 9:55 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Fillmore
Thursday looks like the warmest upcoming period in Fillmore at 78 degrees F.
Saturday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Thursday at about 6 to 18 mph S.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 21, 2026 9:55 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- 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 55. South wind around 6 mph.
Sunny, with a high near 78. South wind 6 to 18 mph.
A chance of showers and thunderstorms between 1am and 4am, then a chance of showers and thunderstorms. Partly cloudy, with a low around 61. South wind around 14 mph. Chance of precipitation is 50%.
Showers and thunderstorms. Mostly cloudy, with a high near 75. Chance of precipitation is 80%.
Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 73. Chance of precipitation is 20%.
Partly cloudy, with a low around 50.
Mostly sunny, with a high near 74.
A chance of showers and thunderstorms after 7pm. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely. Partly sunny, with a high near 75. Chance of precipitation is 60%.
Showers and thunderstorms likely. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
A slight chance of rain showers before 7am. Mostly sunny, with a high near 68. Chance of precipitation is 20%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 22
|
Slight Chance Rain Showers then Mostly Sunny
|
75°F |
7 to 10 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear
|
55°F |
6 mph
S
|
|
Thursday
Apr 23
|
Sunny
|
78°F |
6 to 18 mph
S
|
|
Thursday Night
Apr 23
|
Partly Cloudy then Chance Showers And Thunderstorms
|
61°F |
14 mph
S
|
|
Friday
Apr 24
|
Showers And Thunderstorms
|
75°F |
9 to 13 mph
SW
|
|
Friday Night
Apr 24
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
54°F |
2 to 7 mph
NW
|
|
Saturday
Apr 25
|
Slight Chance Showers And Thunderstorms
|
73°F |
8 mph
N
|
|
Saturday Night
Apr 25
|
Partly Cloudy
|
50°F |
6 mph
NE
|
|
Sunday
Apr 26
|
Mostly Sunny
|
74°F |
6 to 9 mph
E
|
|
Sunday Night
Apr 26
|
Chance Showers And Thunderstorms
|
56°F |
8 to 14 mph
E
|
|
Monday
Apr 27
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
75°F |
15 mph
S
|
|
Monday Night
Apr 27
|
Showers And Thunderstorms Likely
|
51°F |
9 to 13 mph
SW
|
|
Tuesday
Apr 28
|
Slight Chance Rain Showers then Mostly Sunny
|
68°F |
12 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fillmore.