Marissa, IL Weather Forecast
Local 7-day forecast
Mostly Sunny then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Marissa, IL in one place.
A slight chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 92. Heat index values as high as 103. West wind 5 to 9 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Marissa, 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 17, 2026 11:45 AM CDT.
The active forecast window currently covers Jul 18 to Jul 23, 2026 for Marissa, IL.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 18 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 11:45 AM CDT
- Forecast office
- LSX
- Source
- NOAA / NWS
Daily Outlook
This Week in Marissa
Monday looks like the warmest upcoming period in Marissa at 94 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 63 degrees F.
The strongest winds are forecast for Saturday at about 5 to 9 mph W.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 11:45 AM 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 chance of showers and thunderstorms before 10pm, then a chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 73. Heat index values as high as 101. West wind 2 to 7 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 91. North wind around 3 mph. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 71. Chance of precipitation is 30%.
Mostly sunny, with a high near 94.
Partly cloudy, with a low around 75.
Mostly sunny, with a high near 94.
Partly cloudy, with a low around 69.
Mostly sunny, with a high near 85.
Partly cloudy, with a low around 63.
Sunny, with a high near 84.
Partly cloudy, with a low around 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Jul 18
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
92°F |
5 to 9 mph
W
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms
|
73°F |
2 to 7 mph
W
|
|
Sunday
Jul 19
|
Mostly Sunny then Chance Showers And Thunderstorms
|
91°F |
3 mph
N
|
|
Sunday Night
Jul 19
|
Chance Showers And Thunderstorms then Mostly Clear
|
71°F |
2 mph
E
|
|
Monday
Jul 20
|
Mostly Sunny
|
94°F |
3 mph
S
|
|
Monday Night
Jul 20
|
Partly Cloudy
|
75°F |
6 mph
SW
|
|
Tuesday
Jul 21
|
Mostly Sunny
|
94°F |
6 to 9 mph
NW
|
|
Tuesday Night
Jul 21
|
Partly Cloudy
|
69°F |
6 to 9 mph
N
|
|
Wednesday
Jul 22
|
Mostly Sunny
|
85°F |
6 to 9 mph
NE
|
|
Wednesday Night
Jul 22
|
Partly Cloudy
|
63°F |
3 to 7 mph
NE
|
|
Thursday
Jul 23
|
Sunny
|
84°F |
6 mph
NE
|
|
Thursday Night
Jul 23
|
Partly Cloudy
|
66°F |
2 to 6 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Marissa.