Triumph, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Triumph, a community in Lasalle County, Illinois.
Tonight
65°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 65. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Triumph
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 65°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph ESE | 31% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 67% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph ENE | 79% |
| Sunday | 70°F | Showers And Thunderstorms | 10 to 15 mph NE | 79% |
| Sunday Night | 57°F | Showers And Thunderstorms Likely | 15 mph NE | 70% |
| Monday | 65°F | Showers And Thunderstorms Likely | 15 mph ENE | 59% |
| Monday Night | 52°F | Chance Rain Showers | 15 mph NE | 36% |
| Tuesday | 64°F | Chance Rain Showers | 15 mph NE | 29% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 15 mph NNE | 8% |
| Wednesday | 68°F | Partly Sunny | 10 mph NNE | 5% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 5% |
| Thursday | 69°F | Mostly Sunny | 5 mph NNE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 5 mph NNE | 4% |
| Friday | 71°F | Mostly Sunny | 5 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Triumph (41.499, -89.020). Updated through the day.
Growing snapshot for Triumph
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
176 days
More local growing data for Triumph: nearby ZIP 61371 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Millington
Naplate
Newark
North Utica
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Peru
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Wedron
Wenona
Climate data from the nearest NOAA station, Peru, Il (11.2 mi from Triumph). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.