National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Gary Regional Airport (KGYY)

Lat: 41.61°NLon: 87.41°WElev: 584ft.

Fair

59°F

15°C

Humidity 68%
Wind Speed NE 9 mph
Barometer 29.84 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 13 May 1:15 am CDT
Extended Forecast for

Merrillville IN

  • Overnight

    Overnight: Partly cloudy, with a low around 52. West northwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58. North wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 41. North wind 5 to 10 mph becoming light northwest in the evening. Winds could gust as high as 20 mph.

    Low: 41 °F

    Gradual
    Clearing

  • Thursday

    Thursday: Sunny, with a high near 63. North wind around 5 mph, with gusts as high as 10 mph.

    High: 63 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 45. East northeast wind 5 to 10 mph becoming south southeast after midnight.

    Low: 45 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 73.

    High: 73 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers after 1pm. Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 59.

    Low: 59 °F

    Showers
    Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 52. West northwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy, with a high near 58. North wind 10 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 41. North wind 5 to 10 mph becoming light northwest in the evening. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 63. North wind around 5 mph, with gusts as high as 10 mph.
Thursday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 45. East northeast wind 5 to 10 mph becoming south southeast after midnight.
Friday
A 50 percent chance of showers before 1pm. Mostly cloudy, with a high near 73.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 56.
Saturday
A chance of showers after 1pm. Mostly sunny, with a high near 85.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 59.
Sunday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 82.
Sunday Night
A chance of showers. Partly cloudy, with a low around 63.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Breezy.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 62.
Tuesday
Showers likely. Partly sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Merrillville IN
 41.47°N 87.35°W
Last Update:
1:21 am CDT May 13, 2026
Forecast Valid:
1am CDT May 13, 2026-6pm CDT May 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation