Streator, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Streator, a city in Lasalle County, Illinois.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South southwest wind around 5 mph, with gusts as high as 15 mph.
7-day forecast for Streator
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 5 mph SSW | 3% |
| Tonight | 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% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 36% |
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
Nearby towns & communities
Cedar Point
Dana
Dayton
Earlville
Grand Ridge
Harding
Kangley
LaSalle
Leland
Leonore
Lostant
Marseilles
Mendota
Millington
Naplate
Newark
North Utica
Oglesby
Ottawa
Peru
Ransom
Rutland
Seneca
Serena
Sheridan
Tonica
Triumph
Troy Grove
Wedron
Wenona
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 Aug 4, 2026.