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 83. 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: May 24, 2026 11:21 AM CDT.
The active forecast window currently covers May 26 to May 30, 2026 for Merrillville, IN.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 26 to May 30, 2026
- Latest sync
- May 24, 2026 11:21 AM CDT
- Forecast office
- LOT
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrillville
Tuesday looks like the warmest upcoming period in Merrillville at 83 degrees F.
Friday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Friday at about 5 to 15 mph NE.
Precipitation is mentioned in 3 upcoming forecast periods.
Forecast Details
- Last updated
- May 24, 2026 11:21 AM 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 chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 81.
A chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.
Mostly sunny, with a high near 78.
Partly cloudy, with a low around 57.
Mostly sunny, with a high near 74.
Partly cloudy, with a low around 55.
Mostly sunny, with a high near 73.
Partly cloudy, with a low around 55.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
May 26
|
Mostly Sunny
|
83°F |
5 mph
SE
|
|
Tuesday Night
May 26
|
Mostly Cloudy then Chance Showers And Thunderstorms
|
64°F |
0 to 5 mph
SE
|
|
Wednesday
May 27
|
Chance Showers And Thunderstorms
|
81°F |
0 to 5 mph
ENE
|
|
Wednesday Night
May 27
|
Chance Showers And Thunderstorms
|
60°F |
5 mph
NNE
|
|
Thursday
May 28
|
Mostly Sunny
|
78°F |
5 to 10 mph
NE
|
|
Thursday Night
May 28
|
Partly Cloudy
|
57°F |
5 to 10 mph
NE
|
|
Friday
May 29
|
Mostly Sunny
|
74°F |
5 to 15 mph
NE
|
|
Friday Night
May 29
|
Partly Cloudy
|
55°F |
5 to 15 mph
ENE
|
|
Saturday
May 30
|
Mostly Sunny
|
73°F |
5 to 15 mph
NE
|
|
Saturday Night
May 30
|
Partly Cloudy
|
55°F |
5 to 10 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Merrillville.
