Streator, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Streator, a city in Lasalle County, Illinois.
This Afternoon
71°F
Rain Likely
Rain likely and a slight chance of thunderstorms. Mostly cloudy. High near 71, with temperatures falling to around 67 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 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 | 71°F | Rain Likely | 15 to 20 mph S | 64% |
| Tonight | 58°F | Rain | 15 mph S | 93% |
| Wednesday | 61°F | Chance Rain then Mostly Cloudy | 15 mph SSW | 34% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 to 15 mph SW | 9% |
| Thursday | 59°F | Mostly Cloudy then Slight Chance Rain | 10 to 15 mph WSW | 16% |
| Thursday Night | 43°F | Chance Rain | 5 mph NW | 33% |
| Friday | 54°F | Slight Chance Rain | 5 to 10 mph N | 22% |
| Friday Night | 36°F | Partly Cloudy | 0 to 5 mph NNW | 3% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph WNW | 3% |
| Saturday Night | 35°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 59°F | Sunny | 0 to 10 mph W | 13% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 6% |
| Monday | 64°F | Sunny | 0 to 10 mph SW | 3% |
| Monday Night | 40°F | Mostly Clear | 5 mph WSW | 2% |
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 Nov 3, 2026.