Streator, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Streator, a city in Lasalle County, Illinois.
This Afternoon
77°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Partly sunny, with a high near 77. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Streator
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Showers And Thunderstorms Likely | 10 mph E | 57% |
| Tonight | 66°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph ESE | 23% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSE | 52% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 mph NNW | 76% |
| Sunday | 73°F | Showers And Thunderstorms | 5 to 15 mph NE | 77% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 72% |
| Monday | 67°F | Showers And Thunderstorms Likely | 15 mph ENE | 64% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Tuesday | 66°F | Chance Rain Showers | 10 mph NE | 25% |
| Tuesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NNE | 8% |
| Wednesday | 69°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph NNE | 5% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph N | 2% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Streator (41.125, -88.830). Updated through the day.
Growing snapshot for Streator
Last spring frost
Apr 12
First fall frost
Oct 28
Growing season
199 days
Hardiness zone
5b
More local growing data for Streator: nearby ZIP 61364 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Streator 3 Se, Il (3.2 mi from Streator). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.