Local weather forecast

Weather in Rensselaer, IN

Updated 2026-08-11 12:00 local time · ZIP codes 47978

Sunny
Now72°F

Sunny

High / Low87° / 72°
Rain chance83%
Wind14 mph
Weather alerts

Active alerts

5
Severe Thunderstorm Warning issued August 11 at 11:09AM CDT until August 11 at 11:45AM CDT by NWS Chicago IL

At 1109 AM CDT, severe thunderstorms were located along a line extending from Gary to Winfield to near Lake Village, moving east at 80 mph. THESE ARE DESTRUCTIVE STORMS producing measured winds gusts of 90 to over 100 mph. HAZARD...100 mph wind gusts. SOURCE...Radar indicated. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Expect considerable damage to homes and businesses. Expect extensive tree damage and power outages. Locations impacted include... Hammond, Gary, Portage, Merrillville, East Chicago, Schererville, Hobart, Lansing, Crown Point, Highland, Munster, Cedar Lake, Lowell, Momence, Lake Village, Griffith, Dyer, St. John, Lake Station, Lynwood, Lakes of the Four Seasons, Whiting, Winfield, Beecher, and Roselawn.

Safety instructions

Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. This is an EXTREMELY DANGEROUS SITUATION with tornado like wind speeds expected. Mobile homes and high profile vehicles are especially susceptible to winds of this magnitude and may be overturned. For your protection move to an interior room on the lowest floor of a building. These storms have the potential to cause serious injury and significant property damage.

Severe Thunderstorm Warning issued August 11 at 10:54AM CDT until August 11 at 11:45AM CDT by NWS Chicago IL

At 1054 AM CDT, severe thunderstorms were located along a line extending from Markham to near Crete to near Bradley, moving east at 75 mph. THESE ARE DESTRUCTIVE STORMS producing measured winds gusts of 90 to over 100 mph. HAZARD...100 mph wind gusts. SOURCE...Radar indicated. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Expect considerable damage to homes and businesses. Expect extensive tree damage and power outages. These severe storms will be near... Hammond, Gary, Merrillville, East Chicago, Schererville, Lansing, Crown Point, Highland, Munster, and Cedar Lake around 1100 AM CDT. Hobart, Lake Village, Lake Station, and Winfield around 1105 AM CDT. Other locations in the path of these severe thunderstorms include Lakes of the Four Seasons, Roselawn, New Chicago and Shelby.

Safety instructions

Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. This is an EXTREMELY DANGEROUS SITUATION with tornado like wind speeds expected. Mobile homes and high profile vehicles are especially susceptible to winds of this magnitude and may be overturned. For your protection move to an interior room on the lowest floor of a building. These storms have the potential to cause serious injury and significant property damage.

Severe Thunderstorm Warning issued August 11 at 10:49AM CDT until August 11 at 11:45AM CDT by NWS Chicago IL

SVRLOT The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for... Southeastern Will County in northeastern Illinois... Northeastern Kankakee County in northeastern Illinois... Northern Newton County in northwestern Indiana... Lake County in northwestern Indiana... * Until 1145 AM CDT. * At 1048 AM CDT, severe thunderstorms were located along a line extending from Western Springs to Frankfort to near Lakewood Shores, moving east at 50 mph. THESE ARE DESTRUCTIVE STORMS producing measured winds gusts of 80 to over 90 mph. HAZARD...90 mph wind gusts. SOURCE...Radar indicated. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be heavily damaged or destroyed. Homes and businesses will have substantial roof and window damage. Expect extensive tree damage and power outages. * Severe thunderstorms will be near... Bourbonnais, Manteno, and Peotone around 1055 AM CDT. Bradley around 1100 AM CDT. Hammond, Schererville, Lansing, Munster, Dyer, St. John, Lynwood, and Beecher around 1105 AM CDT. Gary, East Chicago, Highland, Cedar Lake, Momence, Griffith, Whiting, and Grant Park around 1110 AM CDT. Merrillville, Crown Point, and Lake Dalecarlia around 1115 AM CDT. Hobart, Lowell, Lake Station, Winfield, and New Chicago around 1120 AM CDT. Portage, Lake Village, and Lakes of the Four Seasons around 1125 AM CDT. Roselawn and Shelby around 1130 AM CDT.

Safety instructions

Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. This is an EXTREMELY DANGEROUS SITUATION with tornado like wind speeds expected. Mobile homes and high profile vehicles are especially susceptible to winds of this magnitude and may be overturned. For your protection move to an interior room on the lowest floor of a building. These storms have the potential to cause serious injury and significant property damage.

Severe Thunderstorm Warning issued August 11 at 11:04AM CDT until August 11 at 12:00PM CDT by NWS Chicago IL

SVRLOT The National Weather Service in Chicago has issued a * Severe Thunderstorm Warning for... Northeastern Newton County in northwestern Indiana... Porter County in northwestern Indiana... Jasper County in northwestern Indiana... * Until noon CDT. * At 1103 AM CDT, severe thunderstorms were located along a line extending from East Chicago to near Griffith to Shelby to Hopkins Park, moving southeast at 85 mph. THESE ARE DESTRUCTIVE STORMS FOR PORTER AND MUCH OF JASPER COUNTIES. HAZARD...100 mph wind gusts. SOURCE...Radar indicated. IMPACT...You are in a life-threatening situation. Flying debris may be deadly to those caught without shelter. Mobile homes will be destroyed. Expect considerable damage to homes and businesses. Expect extensive tree damage and power outages. * Severe thunderstorms will be near... Portage, DeMotte, Hebron, Lakes of the Four Seasons, South Haven, Roselawn, and Ogden Dunes around 1110 AM CDT. Valparaiso, Chesterton, Rensselaer, Wheatfield, Kouts, and Burns Harbor around 1115 AM CDT. Hanging Grove around 1120 AM CDT. Other locations impacted by these severe thunderstorms include Fair Oaks, Parr, Dunns Bridge, Boone Grove, Baileys Corner, Malden, Dune Acres, Stoutsburg, Wheeler, and Collegeville.

Safety instructions

Remain alert for a possible tornado! Tornadoes can develop quickly from severe thunderstorms. If you spot a tornado go at once into the basement or small central room in a sturdy structure. This is an EXTREMELY DANGEROUS SITUATION with tornado like wind speeds expected. Mobile homes and high profile vehicles are especially susceptible to winds of this magnitude and may be overturned. For your protection move to an interior room on the lowest floor of a building. These storms have the potential to cause serious injury and significant property damage.

Flood Advisory issued August 11 at 11:06AM CDT until August 11 at 2:00PM CDT by NWS Chicago IL

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...Northeastern Kankakee County in northeastern Illinois... Southwestern Lake IN County in northwestern Indiana... Northern Newton County in northwestern Indiana... * WHEN...Until 200 PM CDT. * IMPACTS...Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. Roads and streets may be flooded. * ADDITIONAL DETAILS... - At 1105 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms with rainfall rates of 1 to 2 inches per hour moving through the area. Localized flooding of roadways and poor drainage areas will occur shortly. - Some locations that will experience flooding include... Kankakee, Bourbonnais, Bradley, Manteno, Momence, Lake Village, Roselawn, Limestone, Grant Park, Aroma Park, Hopkins Park, Shelby, Sun River Terrace, Schneider, Sumava Resorts and Thayer. - http://www.weather.gov/safety/flood

Safety instructions

A Flood Advisory means minor flooding along waterways and other poor drainage areas is imminent or may already be occurring. Persons in the advisory area should use caution and avoid flood waters.

Hourly

Next hours

NowSunny72°16% rain
1 PMSunny87°8% rain
2 PMSunny85°9% rain
3 PMPatchy rain nearby73°88% rain
4 PMPatchy rain nearby77°40% rain
5 PMPatchy rain nearby81°23% rain
6 PMPatchy rain nearby80°71% rain
7 PMSunny80°16% rain
8 PMClear75°12% rain
9 PMClear73°18% rain
10 PMPatchy rain nearby73°31% rain
11 PMClear72°19% rain
Forecast

3-day weather forecast

Today2026-08-11
Sunny
87° 72°Sunny
Rain 83%Gust 21 mph
Tomorrow2026-08-12
Fog
79° 66°Fog
Rain 88%Gust 12 mph
Thursday2026-08-13
Patchy rain nearby
83° 65°Patchy rain nearby
Rain 78%Gust 8 mph
Conditions

Weather details

Feels like76°F
Humidity100%
Pressure30.13 inHg
Visibility3 mi
Wind14 mph WNW
Wind gusts24 mph
Precipitation0.00 in
UV index1
Daylight

Sunrise, sunset and moon

Sunrise05:54 AM
Sunset07:53 PM
Moonrise03:54 AM
Moon phaseNew Moon
Practical guide

Weather insights for today

Take an umbrella

Rain chance reaches about 88% over the next 12 hours.

Light layers should work

It feels like 76°F with winds near 14 mph.

Best window: 8 PM

75°F, 12% rain chance and 3 mph wind.

Use extra caution while driving

Visibility is around 3 mi; gusts may reach 24 mph.

Running conditions are less comfortable

Current temperature is 72°F, wind 14 mph, rain chance up to 88%.

Low UV protection needs

UV index is 1.

Rensselaer weather today

Sunny and 72°F in Rensselaer, IN. Today's high is 87°F with a 83% rain chance. Winds are around 14 mph with gusts near 24 mph. Relative humidity is 100%, pressure is 30.13 inHg, and visibility is about 3 miles.

Tonight and tomorrow in Rensselaer

Sunrise is at 05:54 AM and sunset is at 07:53 PM. Tomorrow's forecast calls for Fog with a high near 79°F and a low near 66°F. The maximum rain chance is 88%.

Nearby

Weather near Rensselaer

Indiana

Popular cities in Indiana

View state page →