Armstrong, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Armstrong, IL in one place.
A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 93. Southwest wind 5 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Armstrong, 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: Sep 15, 2026 12:52 PM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Armstrong, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 12:52 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Armstrong
Today looks like the warmest upcoming period in Armstrong at 93 degrees F.
Monday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Today at about 5 to 13 mph SW.
Precipitation is mentioned in 14 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 12:52 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
A chance of showers and thunderstorms before 2am, then showers and thunderstorms likely. Mostly cloudy, with a low around 69. North wind around 3 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms likely between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 87. Northeast wind around 3 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.
A chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 70. Southeast wind around 3 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90. West southwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 66. North northeast wind around 3 mph.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. East northeast wind around 6 mph.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 66.
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89.
A slight chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 66.
A chance of showers and thunderstorms. Partly sunny, with a high near 80.
A chance of showers and thunderstorms before 1am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
A slight chance of showers and thunderstorms. Partly sunny, with a high near 74.
A slight chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Sep 15
|
Mostly Sunny then Chance Showers And Thunderstorms
|
93°F |
5 to 13 mph
SW
|
|
Tonight
Sep 15
|
Chance Showers And Thunderstorms
|
69°F |
3 mph
N
|
|
Wednesday
Sep 16
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
87°F |
3 mph
NE
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
70°F |
3 mph
SE
|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
90°F |
5 mph
WSW
|
|
Thursday Night
Sep 17
|
Slight Chance Showers And Thunderstorms
|
66°F |
3 mph
NNE
|
|
Friday
Sep 18
|
Slight Chance Showers And Thunderstorms
|
86°F |
6 mph
ENE
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms
|
66°F |
8 mph
SE
|
|
Saturday
Sep 19
|
Slight Chance Showers And Thunderstorms
|
89°F |
8 to 12 mph
SSW
|
|
Saturday Night
Sep 19
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
66°F |
7 mph
SW
|
|
Sunday
Sep 20
|
Chance Showers And Thunderstorms
|
80°F |
6 to 10 mph
NNW
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
59°F |
6 to 10 mph
NNE
|
|
Monday
Sep 21
|
Slight Chance Showers And Thunderstorms
|
74°F |
8 to 13 mph
NNE
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
54°F |
6 to 13 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Armstrong.