Streator, IL Weather & Growing Conditions
Overnight
63°F
Mostly Clear
Mostly clear, with a low around 63. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Mostly Sunny | 5 mph SSW | 3% |
| Tuesday Night | 68°F | Mostly Cloudy | 0 to 5 mph S | 7% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 54% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 0 to 5 mph SW | 90% |
| Thursday | 81°F | Showers And Thunderstorms Likely | 0 to 5 mph SSE | 74% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SE | 27% |
| Friday | 83°F | Mostly Sunny | 0 mph | 7% |
| Friday Night | 66°F | Mostly Clear | 0 mph | 14% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 71°F | Mostly Clear | 0 to 5 mph SSW | 11% |
| Sunday | 88°F | Mostly Sunny | 5 to 10 mph SSW | 10% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 26% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 26% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Streator, IL
Last spring frost
Apr 12
First fall frost
Oct 28
Growing season
199 days
Hardiness zone
5b
Explore more for Streator, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Streator 3 Se, Il (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.