Olney, IL Weather Forecast
Local 7-day forecast
Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Olney, IL in one place.
Showers and thunderstorms. Mostly cloudy, with a high near 81. South wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Local Weather Overview
This forecast page for Olney, 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: Oct 15, 2026 3:30 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Olney, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 3:30 PM CDT
- Forecast office
- ILX
- Source
- NOAA / NWS
Daily Outlook
This Week in Olney
This Afternoon looks like the warmest upcoming period in Olney at 81 degrees F.
Saturday Night is the coolest period ahead with temperatures near 35 degrees F.
The strongest winds are forecast for Friday at about 21 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 3:30 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ILX
- Radar station
- KVWX
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 9pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 51. West wind 9 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
A slight chance of rain showers before 7am. Mostly cloudy, with a high near 58. Northwest wind around 21 mph, with gusts as high as 30 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Partly cloudy, with a low around 40. North northwest wind 12 to 18 mph, with gusts as high as 26 mph. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 60. North northeast wind 5 to 10 mph, with gusts as high as 17 mph.
Areas of frost after 5am. Clear, with a low around 35. East wind 0 to 3 mph.
Areas of frost before 8am. Sunny, with a high near 67. Southeast wind 1 to 6 mph.
Clear, with a low around 39.
Sunny, with a high near 71.
Partly cloudy, with a low around 44.
Mostly sunny, with a high near 75.
Mostly clear, with a low around 46.
Sunny, with a high near 77.
Clear, with a low around 47.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Showers And Thunderstorms
|
81°F |
10 mph
S
|
|
Tonight
Oct 15
|
Chance Showers And Thunderstorms
|
51°F |
9 to 18 mph
W
|
|
Friday
Oct 16
|
Slight Chance Rain Showers then Mostly Cloudy
|
58°F |
21 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
40°F |
12 to 18 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
60°F |
5 to 10 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
35°F |
0 to 3 mph
E
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
67°F |
1 to 6 mph
SE
|
|
Sunday Night
Oct 18
|
Clear
|
39°F |
3 mph
SE
|
|
Monday
Oct 19
|
Sunny
|
71°F |
1 to 5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
44°F |
2 mph
E
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
75°F |
0 to 3 mph
ESE
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
46°F |
2 mph
ENE
|
|
Wednesday
Oct 21
|
Sunny
|
77°F |
0 to 3 mph
E
|
|
Wednesday Night
Oct 21
|
Clear
|
47°F |
2 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Olney.
Nearby forecast pages are not available for this location yet.
