Merrillville, IN Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Merrillville, IN in one place.
Mostly sunny, with a high near 62. East southeast wind around 5 mph, with gusts as high as 15 mph.
Local Weather Overview
This forecast page for Merrillville, IN 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 9, 2026 5:46 PM CDT.
The active forecast window currently covers Apr 11 to Apr 15, 2026 for Merrillville, IN.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 5:46 PM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrillville
Tuesday looks like the warmest upcoming period in Merrillville at 82 degrees F.
Saturday Night is the coolest period ahead with temperatures near 52 degrees F.
The strongest winds are forecast for Sunday at about 15 to 20 mph SSW.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 5:46 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- LOT
- Radar station
- KLOT
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 after 7pm. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
A slight chance of rain showers. Mostly cloudy, with a high near 76.
A slight chance of rain showers before 7pm, then showers and thunderstorms likely. Cloudy, with a low around 61.
Showers and thunderstorms likely. Mostly cloudy, with a high near 78.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Showers and thunderstorms likely. Mostly cloudy, with a high near 82.
Showers and thunderstorms. Mostly cloudy, with a low around 61.
Showers and thunderstorms likely. Mostly cloudy, with a high near 76.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Mostly Sunny
|
62°F |
5 mph
ESE
|
|
Saturday Night
Apr 11
|
Slight Chance Rain Showers
|
52°F |
5 to 10 mph
SSE
|
|
Sunday
Apr 12
|
Slight Chance Rain Showers
|
76°F |
15 to 20 mph
SSW
|
|
Sunday Night
Apr 12
|
Showers And Thunderstorms Likely
|
61°F |
15 to 20 mph
SW
|
|
Monday
Apr 13
|
Showers And Thunderstorms Likely
|
78°F |
15 mph
SW
|
|
Monday Night
Apr 13
|
Chance Showers And Thunderstorms
|
64°F |
10 to 15 mph
SSW
|
|
Tuesday
Apr 14
|
Showers And Thunderstorms Likely
|
82°F |
15 mph
SSW
|
|
Tuesday Night
Apr 14
|
Showers And Thunderstorms
|
61°F |
15 mph
SSW
|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
76°F |
15 mph
SW
|
|
Wednesday Night
Apr 15
|
Chance Showers And Thunderstorms
|
52°F |
10 to 15 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Merrillville.
