Dorchester, IL Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Dorchester, IL in one place.
A chance of showers and thunderstorms between 7am and 1pm, then showers and thunderstorms likely. Mostly sunny, with a high near 88. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Dorchester, 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: Jul 15, 2026 7:17 AM CDT.
The active forecast window currently covers Jul 17 to Jul 21, 2026 for Dorchester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 7:17 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Dorchester
Monday looks like the warmest upcoming period in Dorchester at 93 degrees F.
Sunday Night is the coolest period ahead with temperatures near 71 degrees F.
The strongest winds are forecast for Tuesday at about 7 to 14 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 7:17 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LSX
- Radar station
- KLSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely before 7pm, then a slight chance of showers and thunderstorms between 7pm and 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
Sunny, with a high near 91.
Mostly clear, with a low around 72.
Sunny, with a high near 91.
Mostly clear, with a low around 71.
A slight chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 93. Chance of precipitation is 20%.
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
Mostly sunny, with a high near 88.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Chance Showers And Thunderstorms
|
88°F |
2 to 8 mph
W
|
|
Friday Night
Jul 17
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
72°F |
2 to 6 mph
W
|
|
Saturday
Jul 18
|
Sunny
|
91°F |
7 to 12 mph
W
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
72°F |
6 to 9 mph
W
|
|
Sunday
Jul 19
|
Sunny
|
91°F |
7 mph
W
|
|
Sunday Night
Jul 19
|
Mostly Clear
|
71°F |
6 mph
SW
|
|
Monday
Jul 20
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
93°F |
6 to 10 mph
SW
|
|
Monday Night
Jul 20
|
Slight Chance Showers And Thunderstorms
|
72°F |
9 mph
W
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
88°F |
7 to 14 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Dorchester.