Arrowsmith, 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 Arrowsmith, IL in one place.
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Heat index values as high as 100. Southwest wind 8 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Arrowsmith, 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 12:57 PM CDT.
The active forecast window currently covers Sep 15 to Sep 21, 2026 for Arrowsmith, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 12:57 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Arrowsmith
Today looks like the warmest upcoming period in Arrowsmith at 91 degrees F.
Monday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Monday at about 12 to 17 mph NE.
Precipitation is mentioned in 14 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 12:57 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 11pm, then showers and thunderstorms. Mostly cloudy, with a low around 67. North wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms between 1pm and 3pm, then a chance of showers and thunderstorms between 3pm and 4pm. Partly sunny, with a high near 84. East northeast wind around 8 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
A chance of showers and thunderstorms between 7pm and 10pm, then a chance of showers and thunderstorms. Partly cloudy, with a low around 69. East southeast wind around 7 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 87. West wind around 8 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 1am. Partly cloudy, with a low around 66. North northeast wind around 8 mph.
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. East wind around 9 mph. Chance of precipitation is 30%.
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 67.
A slight chance of rain showers before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
A slight chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 65.
Showers and thunderstorms likely. Partly sunny, with a high near 77.
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 57.
A slight chance of rain showers between 7am and 1pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 73.
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
|
91°F |
8 to 15 mph
SW
|
|
Tonight
Sep 15
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
67°F |
8 mph
N
|
|
Wednesday
Sep 16
|
Showers And Thunderstorms Likely
|
84°F |
8 mph
ENE
|
|
Wednesday Night
Sep 16
|
Chance Showers And Thunderstorms
|
69°F |
7 mph
ESE
|
|
Thursday
Sep 17
|
Chance Showers And Thunderstorms
|
87°F |
8 mph
W
|
|
Thursday Night
Sep 17
|
Partly Cloudy then Slight Chance Showers And Thunderstorms
|
66°F |
8 mph
NNE
|
|
Friday
Sep 18
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
84°F |
9 mph
E
|
|
Friday Night
Sep 18
|
Slight Chance Showers And Thunderstorms
|
67°F |
12 mph
SE
|
|
Saturday
Sep 19
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
86°F |
15 mph
SSW
|
|
Saturday Night
Sep 19
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
65°F |
12 mph
W
|
|
Sunday
Sep 20
|
Showers And Thunderstorms Likely
|
77°F |
9 to 15 mph
N
|
|
Sunday Night
Sep 20
|
Chance Showers And Thunderstorms
|
57°F |
10 to 15 mph
NNE
|
|
Monday
Sep 21
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
73°F |
12 to 17 mph
NE
|
|
Monday Night
Sep 21
|
Slight Chance Showers And Thunderstorms then Partly Cloudy
|
54°F |
9 to 17 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Arrowsmith.