Live Weather & Forecast

Weather in Merrillville

Indiana, United States · Real-time conditions & 3-day outlook

Flag of United States
Overcast
18°C
Feels like 18°C
65°F / Feels 65°F
Overcast
Merrillville, Indiana
🌙 Nighttime
Updated: 2026-04-13 02:00
💧
Humidity
100%
💨
Wind
25.2 km/h WSW
🌬️
Wind Gust
37.2 km/h
🌡️
Pressure
1010 mb
👁️
Visibility
16 km
☀️
UV Index
0 (Low)
🌧️
Precipitation
0.12 mm
☁️
Cloud Cover
100%
💦
Dew Point
14.2°C
🌐
Wind Degree
243°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
173.9 μg/m³
NO₂
7.8 μg/m³
O₃
93 μg/m³
SO₂
3.1 μg/m³
PM 2.5
5.1 μg/m³
PM 10
5.2 μg/m³

Weather Alerts 4

Met · Severe · Immediate
Flood Warning issued April 12 at 10:22AM CDT until April 14 at 1:00AM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Kankakee River at Dunns Bridge affecting Porter and Jasper Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. For the Kankakee River...including Dunns Bridge...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kankakee River from Near I-65 and...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T10:22:00-05:00  ·  Expires: 2026-04-13T04:30:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 9:04PM CDT until April 13 at 7:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Illinois... Kankakee River at Shelby affecting Lake IN and Newton Counties. Fox River at Algonquin Lock & Dam tailwater affecting Kane, McHenry and Lake IL Counties. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kankakee River from Near I-65 and De Motte downstream to IL/IN state line, includ...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T21:04:00-05:00  ·  Expires: 2026-04-13T15:15:00-05:00
Met · Severe · Immediate
Flood Warning issued April 12 at 10:22AM CDT until April 12 at 10:00PM CDT by NWS Chicago IL

...The Flood Warning continues for the following rivers in Indiana... Kankakee River at Dunns Bridge affecting Porter and Jasper Counties. Kankakee River at Shelby affecting Newton and Lake IN Counties. For the Kankakee River...including Dunns Bridge...Minor flooding is occurring. * WHAT...Minor flooding is occurring and minor flooding is forecast. * WHERE...Kankakee River from US-421 south o...

A Flood Warning means water levels above flood stage are imminent or may already be occurring. Persons along rivers and streams in the warned area should take immediate precautions to protect life and property. These forecasts are based on observed precipitation as well as forecast precipitation...

Effective: 2026-04-12T10:22:00-05:00  ·  Expires: 2026-04-12T22:00:00-05:00
Met · Moderate · Expected
Special Weather Statement issued April 13 at 12:06AM EDT by NWS Northern Indiana

Gusty south winds could briefly gust as high as 50 mph for a short time during the early morning hours through around 3 AM EDT. A band of showers moving across northwest Indiana and southwest Lower Michigan will likely aid in producing some stronger wind gusts of 40 to 50 mph. If travelling, be prepared for brief periods of these stronger wind gusts, particularly for high profile vehicles.

Effective: 2026-04-13T00:06:00-04:00  ·  Expires: 2026-04-13T04:00:00-04:00

Today's Hourly Forecast

24-hour breakdown for Merrillville, Indiana

12 AM
Patchy rain nearby
18°
Patchy rain nearby
💧 67% 💨 27.4 km/h 🌧️ 100%
1 AM
Moderate or heavy rain shower
18°
Moderate or heavy rain shower
💧 83% 💨 28.1 km/h 🌧️ 100%
2 AM
Overcast
18°
Overcast
💧 100% 💨 25.2 km/h 🌧️ 100%
3 AM
Partly Cloudy
18°
Partly Cloudy
💧 88% 💨 23.4 km/h
4 AM
Partly Cloudy
18°
Partly Cloudy
💧 90% 💨 23 km/h
5 AM
Light drizzle
18°
Light drizzle
💧 93% 💨 20.2 km/h 🌧️ 100%
6 AM
Light rain
18°
Light rain
💧 92% 💨 20.5 km/h 🌧️ 100%
7 AM
Overcast
18°
Overcast
💧 91% 💨 20.5 km/h
8 AM
Overcast
18°
Overcast
💧 91% 💨 18.7 km/h
9 AM
Overcast
19°
Overcast
💧 92% 💨 17.6 km/h
10 AM
Overcast
19°
Overcast
💧 92% 💨 18 km/h
11 AM
Overcast
20°
Overcast
💧 91% 💨 18.7 km/h
12 PM
Overcast
21°
Overcast
💧 89% 💨 19.1 km/h
1 PM
Overcast
21°
Overcast
💧 83% 💨 16.9 km/h
2 PM
Thundery outbreaks in nearby
22°
Thundery outbreaks in nearby
💧 85% 💨 13.3 km/h
3 PM
Thundery outbreaks in nearby
24°
Thundery outbreaks in nearby
💧 78% 💨 18 km/h
4 PM
Thundery outbreaks in nearby
24°
Thundery outbreaks in nearby
💧 72% 💨 23 km/h
5 PM
Thundery outbreaks in nearby
24°
Thundery outbreaks in nearby
💧 71% 💨 24.5 km/h
6 PM
Thundery outbreaks in nearby
24°
Thundery outbreaks in nearby
💧 73% 💨 23.8 km/h
7 PM
Thundery outbreaks in nearby
23°
Thundery outbreaks in nearby
💧 80% 💨 25.2 km/h
8 PM
Thundery outbreaks in nearby
23°
Thundery outbreaks in nearby
💧 82% 💨 27.4 km/h
9 PM
Thundery outbreaks in nearby
22°
Thundery outbreaks in nearby
💧 85% 💨 27 km/h
10 PM
Thundery outbreaks in nearby
21°
Thundery outbreaks in nearby
💧 85% 💨 26.6 km/h
11 PM
Thundery outbreaks in nearby
21°
Thundery outbreaks in nearby
💧 91% 💨 26.3 km/h

3-Day Forecast

Daily overview for Merrillville, Indiana

Today
Patchy rain nearby
Patchy rain nearby
25° / 17°
🌧️ 89% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 28.1 km/h
🌧️ Total precip: 3.02 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:12 AM
🌇 Sunset: 07:28 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Patchy rain nearby
Patchy rain nearby
25° / 20°
🌧️ 80% chance of rain
💧 Avg. humidity: 89%
💨 Max wind: 28.4 km/h
🌧️ Total precip: 2.63 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:11 AM
🌇 Sunset: 07:29 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Moderate rain
Moderate rain
22° / 19°
🌧️ 86% chance of rain
💧 Avg. humidity: 86%
💨 Max wind: 28.1 km/h
🌧️ Total precip: 15.01 mm
☀️ UV Index: 0.5
🌅 Sunrise: 06:09 AM
🌇 Sunset: 07:30 PM
🌙 Waning Crescent
🌑 Moon: 8% lit

Best Time to Visit Merrillville

Plan your trip to Merrillville, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Merrillville 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Merrillville?
Current conditions in Merrillville: Overcast, temperature 18°C, humidity 100%.
What is the best time to visit Merrillville?
The best time to visit Merrillville is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Merrillville?
Merrillville is located at approximately 41.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Merrillville?
The wettest period in Merrillville is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Merrillville?
For visits to Merrillville during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Merrillville in?
Merrillville is located in United States, in the state of Indiana.
What are the public holidays in Merrillville in 2026?
View the 2026 public holidays for Merrillville on our Holidays page.
What are the GPS coordinates used for the weather forecast in Merrillville?
The weather forecast for Merrillville uses coordinates 41.4828, -87.3328.