Merrimac, IL Weather Forecast
Local 7-day forecast
Areas Of Fog then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Merrimac, IL in one place.
Areas of fog before 8am. Sunny. High near 65, with temperatures falling to around 60 in the afternoon. West wind 2 to 6 mph.
Local Weather Overview
This forecast page for Merrimac, 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: Nov 8, 2026 7:56 AM CST.
The active forecast window currently covers Nov 8 to Nov 14, 2026 for Merrimac, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 8 to Nov 14, 2026
- Latest sync
- Nov 8, 2026 7:56 AM CST
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrimac
Tuesday looks like the warmest upcoming period in Merrimac at 70 degrees F.
Friday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Thursday at about 7 to 10 mph N.
Precipitation is mentioned in 1 upcoming forecast period.
Forecast Details
- Last updated
- Nov 8, 2026 7:56 AM CST
- Coverage
- 8 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
Mostly clear, with a low around 37. Northwest wind 0 to 3 mph.
Sunny. High near 68, with temperatures falling to around 62 in the afternoon. Southwest wind around 2 mph.
Clear, with a low around 42. Southwest wind around 3 mph.
Sunny. High near 70, with temperatures falling to around 64 in the afternoon. West wind around 3 mph.
Mostly clear, with a low around 45.
A chance of rain and a slight chance of thunderstorms after noon. Partly sunny, with a high near 67. Chance of precipitation is 30%.
Mostly cloudy, with a low around 39.
Mostly sunny, with a high near 54.
Partly cloudy, with a low around 31.
Sunny, with a high near 51.
Mostly clear, with a low around 30.
Sunny, with a high near 58.
Mostly clear, with a low around 36.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Today
Nov 8
|
Areas Of Fog then Sunny
|
65°F |
2 to 6 mph
W
|
|
Tonight
Nov 8
|
Mostly Clear
|
37°F |
0 to 3 mph
NW
|
|
Monday
Nov 9
|
Sunny
|
68°F |
2 mph
SW
|
|
Monday Night
Nov 9
|
Clear
|
42°F |
3 mph
SW
|
|
Tuesday
Nov 10
|
Sunny
|
70°F |
3 mph
W
|
|
Tuesday Night
Nov 10
|
Mostly Clear
|
45°F |
0 mph
|
|
Veterans Day
Nov 11
|
Partly Sunny then Chance Light Rain
|
67°F |
0 to 8 mph
W
|
|
Wednesday Night
Nov 11
|
Mostly Cloudy
|
39°F |
8 mph
N
|
|
Thursday
Nov 12
|
Mostly Sunny
|
54°F |
7 to 10 mph
N
|
|
Thursday Night
Nov 12
|
Partly Cloudy
|
31°F |
3 to 9 mph
N
|
|
Friday
Nov 13
|
Sunny
|
51°F |
6 mph
N
|
|
Friday Night
Nov 13
|
Mostly Clear
|
30°F |
2 mph
NW
|
|
Saturday
Nov 14
|
Sunny
|
58°F |
5 mph
NW
|
|
Saturday Night
Nov 14
|
Mostly Clear
|
36°F |
2 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Merrimac.