Weather Alert
Triangle Park Weather Warning NWS WEATHER ALERT FOR THE TRIANGLE PARK, IL AREA - Issued: 1018 PM CDT Sat Sep 19 2026 Triangle Park Weather Warning

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Triangle Park, IL Weather Forecast

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Triangle Park, IL Weather Forecast

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Triangle Park IL weather - Mist - 67°F
Mist
67°F
Updated 11:24 pm
Feels Like 67°F
Humidity 96%
Wind E 3 mph
Barometer  29.95 in
Dew Point 66°F
Triangle Park IL weather - Mist - 19°C
Mist
19°C
Updated 11:24 pm
Feels Like 20°C
Humidity 96%
Wind E 5 km/h
Barometer  101.4 kPa
Dew Point 19°C
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Triangle Park Weather Forecast

REST OF TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Triangle Park, IL Weather - Rest Of Tonight Chance Of T-Storm Triangle Park, IL Weather - Sunday Chance Of Showers Triangle Park, IL Weather - Sunday Night Mostly Cloudy Triangle Park, IL Weather - Monday Chance Of Showers Triangle Park, IL Weather - Monday Night Chance Of Showers Triangle Park, IL Weather - Tuesday Chance Of Showers Triangle Park, IL Weather - Tuesday Night Chance Of Showers Triangle Park, IL Weather - Wednesday Chance Of Showers Triangle Park, IL Weather - Wednesday Night Mostly Cloudy Triangle Park, IL Weather - Thursday Mostly Cloudy Triangle Park, IL Weather - Thursday Night Mostly Cloudy Triangle Park, IL Weather - Friday Mostly Cloudy
Chance of T-Storm Chance of Showers Mostly Cloudy Chance of Showers Chance of Showers Chance of Showers Chance of Showers Chance of Showers Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy
Lo: 65°FLo: 18°C Hi: 65°FHi: 18°C
 Lo: 55°FLo: 13°C Hi: 65°FHi: 18°C
 Lo: 51°FLo: 11°C Hi: 61°FHi: 16°C
 Lo: 51°FLo: 11°C Hi: 61°FHi: 16°C
 Lo: 51°FLo: 11°C Hi: 65°FHi: 18°C
 Lo: 51°FLo: 11°C Hi: 69°FHi: 21°C
POP: 100% POP: 70% POP: 40% POP: 30% POP: 20% POP: 20% POP: 20%
POP = Probability of Precipitation.
Weather Outlook Updated: 901 PM CDT Sat Sep 19 2026 Triangle Park, IL Weather - WeatherWorld.com

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Issued: 943 PM CDT Sat Sep 19 2026

Key Messages

  • A Flood Watch for flash flooding is in effect for areas roughly along and north of the Illinois and Kankakee rivers through early Sunday morning.
  • Heavy rain-producing showers and thunderstorms are expected to redevelop late tonight. Flash flooding will be possible where the heaviest rains occur over the same areas.
  • Showers/drizzle and perhaps an isolated thunderstorm likely to continue for most of the area through the day on Sunday. Periods of showers to persist off-and-on through Tu...