Weather

Daily Weather Brief for 17 July 2026

High/low temperatures and weather conditions from official National Weather Service forecast data for CGN coverage areas.

By Jessica Storm · July 17, 2026
Email Reporter
Daily Weather Brief for 17 July 2026
CGN News / Cook Global News Network / CGN Weather Brief / All Rights Reserved

INDIANAPOLIS | CGN News is publishing the Daily Weather Brief from official National Weather Service forecast data for Indianapolis, northwest Indiana, Chicago, St. Louis and Ozark County coverage areas.

Today and tonight

Indianapolis: Partly Cloudy; high/low 90/76°F. Overnight — Partly Cloudy; near 76°F; wind 1 mph SSE; Partly cloudy, with a low around 76. South southeast wind around 1 mph. Friday — Scattered Showers And Thunderstorms; near 90°F; wind 1 to 6 mph SSW; Scattered showers and thunderstorms between 8am and 2pm, then showers and thunderstorms between 2pm and 5pm, then a chance of showers and thunderstorms. Partly sunny. High near 90, with temperatures falling to around 86 in the afternoon. South southwest wind 1 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.

Crown Point: Smoke; high/low 88/70°F. Overnight — Smoke; near 70°F; wind 0 mph; Smoke and a slight chance of showers and thunderstorms. Mostly cloudy. Low around 70, with temperatures rising to around 72 overnight. East southeast wind around 0 mph. Chance of precipitation is 20%. Friday — Smoke; near 88°F; wind 0 to 5 mph S; Smoke and scattered showers and thunderstorms. Mostly cloudy. High near 88, with temperatures falling to around 84 in the afternoon. Heat index values as high as 96. South wind 0 to 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Valparaiso: Smoke; high/low 87/71°F. Overnight — Smoke; near 71°F; wind 0 mph; Smoke. Mostly cloudy, with a low around 71. East southeast wind around 0 mph. Friday — Smoke; near 87°F; wind 0 to 5 mph S; Smoke before 7am, then smoke and scattered showers and thunderstorms. Partly sunny. High near 87, with temperatures falling to around 84 in the afternoon. Heat index values as high as 95. South wind 0 to 5 mph, with gusts as high as 10 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

Rensselaer: Smoke; high/low 87/70°F. Overnight — Smoke; near 70°F; wind 0 mph; Smoke and a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Wind around 0 mph. Chance of precipitation is 20%. Friday — Smoke; near 87°F; wind 0 to 5 mph S; Smoke and a slight chance of showers and thunderstorms before 8am, then areas of smoke and scattered showers and thunderstorms between 8am and 11am, then areas of smoke and scattered showers and thunderstorms. Mostly cloudy. High near 87, with temperatures falling to around 84 in the afternoon. South wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

Kentland: Areas Of Smoke; high/low 87/71°F. Overnight — Areas Of Smoke; near 71°F; wind 0 mph; Areas of smoke and a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Wind around 0 mph. Chance of precipitation is 20%. Friday — Areas Of Smoke; near 87°F; wind 0 to 5 mph WSW; Areas of smoke and a slight chance of showers and thunderstorms before 7am, then areas of smoke and scattered showers and thunderstorms between 7am and 11am, then patchy smoke and scattered showers and thunderstorms. Partly sunny. High near 87, with temperatures falling to around 84 in the afternoon. Heat index values as high as 95. West southwest wind 0 to 5 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

Chicago: Smoke; high/low 89/76°F. Overnight — Smoke; near 76°F; wind 0 mph; Smoke. Mostly cloudy, with a low around 76. Southeast wind around 0 mph. Friday — Smoke; near 89°F; wind 0 to 5 mph S; Smoke before 11am, then smoke and scattered showers and thunderstorms. Partly sunny, with a high near 89. South wind 0 to 5 mph, with gusts as high as 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

St. Louis: Partly Cloudy; high/low 92/74°F. Overnight — Partly Cloudy; near 74°F; wind 2 mph W; Partly cloudy, with a low around 74. West wind around 2 mph. Friday — Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms; near 92°F; wind 2 to 7 mph W; A slight chance of rain showers between 8am and 10am, then a slight chance of showers and thunderstorms between 10am and noon, then a chance of showers and thunderstorms between noon and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 92. Heat index values as high as 101. West wind 2 to 7 mph. Chance of precipitation is 30%.

Gainesville: Mostly Clear; high/low 90/71°F. Overnight — Mostly Clear; near 71°F; wind 1 mph W; Mostly clear, with a low around 71. West wind around 1 mph. Friday — Sunny then Isolated Showers And Thunderstorms; near 90°F; wind 1 to 7 mph W; Isolated showers and thunderstorms after 1pm. Sunny. High near 90, with temperatures falling to around 88 in the afternoon. Heat index values as high as 96. West wind 1 to 7 mph. Chance of precipitation is 20%.

Tecumseh: Mostly Clear; high/low 89/70°F. Overnight — Mostly Clear; near 70°F; wind 0 mph; Mostly clear. Low around 70, with temperatures rising to around 72 overnight. Wind around 0 mph. Friday — Sunny then Isolated Showers And Thunderstorms; near 89°F; wind 1 to 7 mph W; Isolated showers and thunderstorms after 1pm. Sunny. High near 89, with temperatures falling to around 87 in the afternoon. Heat index values as high as 95. West wind 1 to 7 mph. Chance of precipitation is 20%.

Forecasts can change quickly. Readers should check current National Weather Service forecasts, warnings and local emergency information before travel, outdoor work, school activities or public events.

Additional Reporting By: National Weather Service; NOAA

What This Means

Readers should use this brief as a planning overview for high and low temperatures, weather conditions, travel timing and outdoor activity decisions. Immediate safety decisions should be based on current National Weather Service alerts and local emergency information.

Advertisement
Advertisement
Sponsored placement