Plymouth, IL Weather Forecast
Local 7-day forecast
Rain Showers Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Plymouth, IL in one place.
Rain showers likely before 1pm. Mostly sunny, with a high near 54. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Local Weather Overview
This forecast page for Plymouth, 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 7:04 AM CDT.
The active forecast window currently covers Apr 18 to Apr 22, 2026 for Plymouth, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 18 to Apr 22, 2026
- Latest sync
- Apr 16, 2026 7:04 AM CDT
- Forecast office
- DVN
- Source
- NOAA / NWS
Daily Outlook
This Week in Plymouth
Wednesday looks like the warmest upcoming period in Plymouth at 75 degrees F.
Saturday Night is the coolest period ahead with temperatures near 36 degrees F.
The strongest winds are forecast for Saturday at about 15 to 20 mph NW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 16, 2026 7:04 AM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- DVN
- Radar station
- KILX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 36.
Sunny, with a high near 59.
Mostly clear, with a low around 40.
Sunny, with a high near 68.
Mostly clear, with a low around 50.
Mostly sunny, with a high near 74.
Mostly clear, with a low around 53.
A slight chance of rain showers after 7am. Sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 18
|
Rain Showers Likely
|
54°F |
15 to 20 mph
NW
|
|
Saturday Night
Apr 18
|
Mostly Clear
|
36°F |
10 to 15 mph
W
|
|
Sunday
Apr 19
|
Sunny
|
59°F |
10 to 15 mph
NW
|
|
Sunday Night
Apr 19
|
Mostly Clear
|
40°F |
5 to 10 mph
E
|
|
Monday
Apr 20
|
Sunny
|
68°F |
10 to 15 mph
S
|
|
Monday Night
Apr 20
|
Mostly Clear
|
50°F |
10 to 15 mph
S
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
74°F |
15 mph
SW
|
|
Tuesday Night
Apr 21
|
Mostly Clear
|
53°F |
10 to 15 mph
SW
|
|
Wednesday
Apr 22
|
Slight Chance Rain Showers
|
75°F |
10 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Plymouth.