Lancaster, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Lancaster, IL in one place.
A chance of showers and thunderstorms before 4pm, then showers and thunderstorms likely. Partly sunny. High near 85, with temperatures falling to around 83 in the afternoon. South southwest wind 7 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Lancaster, 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 3:29 PM CDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Lancaster, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 3:29 PM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Lancaster
This Afternoon looks like the warmest upcoming period in Lancaster at 85 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Tonight at about 10 to 20 mph W.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 3:29 PM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- PAH
- Radar station
- KVWX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely. Mostly cloudy. Low around 51, with temperatures rising to around 55 overnight. West wind 10 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Mostly cloudy. High near 58, with temperatures falling to around 56 in the afternoon. Northwest wind around 20 mph, with gusts as high as 28 mph.
Partly cloudy, with a low around 41. North northwest wind 12 to 17 mph, with gusts as high as 23 mph.
Sunny, with a high near 59. North northeast wind 5 to 10 mph.
Areas of frost after 5am. Clear, with a low around 36. East northeast wind around 3 mph.
Areas of frost before 8am. Sunny, with a high near 66. Southeast wind 1 to 6 mph.
Mostly clear, with a low around 39. Southeast wind around 3 mph.
Sunny, with a high near 72. South wind 1 to 5 mph.
Partly cloudy, with a low around 45. East wind around 2 mph.
Sunny, with a high near 74. East wind 0 to 3 mph.
Mostly clear, with a low around 46. East northeast wind around 2 mph.
Sunny, with a high near 77. East northeast wind 0 to 3 mph.
Mostly clear, with a low around 48. East northeast wind around 2 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Oct 15
|
Chance Showers And Thunderstorms
|
85°F |
7 to 12 mph
SSW
|
|
Tonight
Oct 15
|
Showers And Thunderstorms Likely
|
51°F |
10 to 20 mph
W
|
|
Friday
Oct 16
|
Mostly Cloudy
|
58°F |
20 mph
NW
|
|
Friday Night
Oct 16
|
Partly Cloudy
|
41°F |
12 to 17 mph
NNW
|
|
Saturday
Oct 17
|
Sunny
|
59°F |
5 to 10 mph
NNE
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
36°F |
3 mph
ENE
|
|
Sunday
Oct 18
|
Areas Of Frost then Sunny
|
66°F |
1 to 6 mph
SE
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
39°F |
3 mph
SE
|
|
Monday
Oct 19
|
Sunny
|
72°F |
1 to 5 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
45°F |
2 mph
E
|
|
Tuesday
Oct 20
|
Sunny
|
74°F |
0 to 3 mph
E
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
46°F |
2 mph
ENE
|
|
Wednesday
Oct 21
|
Sunny
|
77°F |
0 to 3 mph
ENE
|
|
Wednesday Night
Oct 21
|
Mostly Clear
|
48°F |
2 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lancaster.