Dorchester, IL Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Dorchester, IL in one place.
A chance of rain showers. Mostly sunny, with a high near 57. Northwest wind around 18 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
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: Apr 16, 2026 8:06 PM CDT.
The active forecast window currently covers Apr 18 to Apr 23, 2026 for Dorchester, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 23, 2026
- Latest sync
- Apr 16, 2026 8:06 PM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Dorchester
Thursday looks like the warmest upcoming period in Dorchester at 77 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Saturday at about 18 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 8:06 PM CDT
- Coverage
- 6 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
A slight chance of rain showers before 7pm. Mostly clear, with a low around 36. West wind 6 to 15 mph, with gusts as high as 23 mph. Chance of precipitation is 20%.
Sunny, with a high near 62.
Mostly clear, with a low around 39.
Sunny, with a high near 69.
Mostly clear, with a low around 50.
Mostly sunny, with a high near 76.
Partly cloudy, with a low around 54.
Sunny, with a high near 76.
A slight chance of rain showers after 1am. Mostly clear, with a low around 54. Chance of precipitation is 20%.
A slight chance of rain showers before 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 77. Chance of precipitation is 30%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Chance Rain Showers
|
57°F |
18 mph
NW
|
|
Saturday Night
Apr 18
|
Slight Chance Rain Showers then Mostly Clear
|
36°F |
6 to 15 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
62°F |
5 to 15 mph
W
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
39°F |
5 to 10 mph
NE
|
|
Monday
Apr 20
|
Sunny
|
69°F |
6 to 10 mph
SE
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
10 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
76°F |
10 to 16 mph
SW
|
|
Tuesday Night
Apr 21
|
Partly Cloudy
|
54°F |
7 to 12 mph
SW
|
|
Wednesday
Apr 22
|
Sunny
|
76°F |
7 to 10 mph
SW
|
|
Wednesday Night
Apr 22
|
Mostly Clear then Slight Chance Rain Showers
|
54°F |
8 mph
S
|
|
Thursday
Apr 23
|
Chance Showers And Thunderstorms
|
77°F |
8 to 14 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Dorchester.