Lancaster, IL Weather Forecast
Local 7-day forecast
Partly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Lancaster, IL in one place.
Partly cloudy. Low around 69, with temperatures rising to around 71 overnight. South southwest wind around 12 mph, with gusts as high as 18 mph.
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: Apr 15, 2026 7:38 AM CDT.
The active forecast window currently covers Apr 15 to Apr 21, 2026 for Lancaster, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 15 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 7:38 AM CDT
- Forecast office
- PAH
- Source
- NOAA / NWS
Daily Outlook
This Week in Lancaster
Friday looks like the warmest upcoming period in Lancaster at 86 degrees F.
Sunday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Wednesday at about 10 to 20 mph SSW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 7:38 AM 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
A slight chance of showers and thunderstorms between 9am and 11am, then a chance of showers and thunderstorms between 11am and 1pm, then a slight chance of showers and thunderstorms between 1pm and 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 85. South southwest wind 10 to 20 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
A chance of showers and thunderstorms before 7pm, then a chance of showers and thunderstorms between midnight and 1am, then a chance of showers and thunderstorms between 1am and 4am, then showers and thunderstorms likely between 4am and 5am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 65, with temperatures rising to around 68 overnight. South southwest wind 10 to 16 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
A chance of showers and thunderstorms before 7am, then showers and thunderstorms between 7am and 1pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind 10 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
A chance of showers and thunderstorms before 1am. Mostly clear, with a low around 59. Southwest wind 3 to 10 mph. Chance of precipitation is 50%.
A slight chance of rain showers between 1pm and 4pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 86. South wind 3 to 12 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms before 10pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 62. South wind 9 to 13 mph, with gusts as high as 21 mph.
Showers and thunderstorms likely before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 74. West southwest wind 13 to 17 mph, with gusts as high as 25 mph.
A chance of showers and thunderstorms. Partly cloudy, with a low around 40. West northwest wind around 13 mph, with gusts as high as 20 mph.
A slight chance of rain showers before 7am. Sunny, with a high near 61. West northwest wind 9 to 15 mph, with gusts as high as 22 mph.
Clear, with a low around 39. Northwest wind 5 to 10 mph.
Sunny, with a high near 67. South southwest wind 6 to 9 mph.
Mostly clear, with a low around 48. South wind around 7 mph.
Sunny, with a high near 75. South southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 15
|
Partly Cloudy
|
69°F |
12 mph
SSW
|
|
Wednesday
Apr 15
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
85°F |
10 to 20 mph
SSW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
65°F |
10 to 16 mph
SSW
|
|
Thursday
Apr 16
|
Chance Showers And Thunderstorms then Showers And Thunderstorms
|
80°F |
10 to 15 mph
SW
|
|
Thursday Night
Apr 16
|
Chance Showers And Thunderstorms
|
59°F |
3 to 10 mph
SW
|
|
Friday
Apr 17
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
86°F |
3 to 12 mph
S
|
|
Friday Night
Apr 17
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
62°F |
9 to 13 mph
S
|
|
Saturday
Apr 18
|
Showers And Thunderstorms Likely
|
74°F |
13 to 17 mph
WSW
|
|
Saturday Night
Apr 18
|
Chance Showers And Thunderstorms
|
40°F |
13 mph
WNW
|
|
Sunday
Apr 19
|
Slight Chance Rain Showers then Sunny
|
61°F |
9 to 15 mph
WNW
|
|
Sunday Night
Apr 19
|
Clear
|
39°F |
5 to 10 mph
NW
|
|
Monday
Apr 20
|
Sunny
|
67°F |
6 to 9 mph
SSW
|
|
Monday Night
Apr 20
|
Mostly Clear
|
48°F |
7 mph
S
|
|
Tuesday
Apr 21
|
Sunny
|
75°F |
7 to 14 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lancaster.