| NWS Forecast for: Porter County Issued by: National Weather Service Chicago, IL Last Update: 333 AM CDT Sat Jul 18 2026 |  |
Today: Partly cloudy in the morning, then becoming mostly cloudy. A slight chance of showers and thunderstorms late in the morning. Showers and thunderstorms likely early in the afternoon, then a chance of showers and thunderstorms late. Highs in the upper 80s inland, but only in the lower 80s near the lake. Temperature falling into the upper 70s in the afternoon. West winds 10 to 15 mph, becoming northwest in the afternoon. Chance of precipitation 70 percent. Heat index values up to 102. Tonight: Mostly clear. Patchy smoke. Lows in the lower 60s. Northeast winds 5 to 10 mph. Sunday: Mostly sunny. Patchy smoke. Highs in the upper 70s. Northeast winds around 5 mph. Sunday Night: Mostly clear. Lows in the lower 60s. Northeast winds around 5 mph, becoming southeast after midnight. Monday: Partly cloudy in the morning, then becoming mostly cloudy. Humid with highs in the mid 80s. South winds 5 to 10 mph. Monday Night: Mostly cloudy. A chance of showers and thunderstorms in the evening, then showers likely with a slight chance of thunderstorms after midnight. Lows around 70. Chance of precipitation 70 percent. Tuesday: Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 80s inland, but only in the upper 70s near the lake. Chance of precipitation 20 percent. Tuesday Night: Mostly clear. Lows in the lower 60s. Wednesday: Mostly sunny in the morning, then becoming partly cloudy. Highs in the mid 70s. Wednesday Night: Mostly clear. Lows in the upper 50s. Thursday: Mostly sunny. Highs in the upper 70s. Thursday Night: Mostly clear in the evening, then becoming partly cloudy. Lows around 60. Friday: Partly cloudy. Highs around 80. | |
| Zone Forecast: Porter County | |
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