Trenton, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trenton, a city in Clinton County, Illinois.
Tonight
55°F
Rain
Rain and a slight chance of thunderstorms. Cloudy, with a low around 55. South wind 9 to 16 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Trenton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Rain | 9 to 16 mph S | 97% |
| Wednesday | 64°F | Chance Rain Showers then Mostly Cloudy | 7 to 15 mph W | 12% |
| Wednesday Night | 43°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 66°F | Sunny | 5 to 12 mph W | 0% |
| Thursday Night | 44°F | Mostly Cloudy | 3 mph NW | 5% |
| Friday | 59°F | Mostly Cloudy | 5 to 12 mph NW | 7% |
| Friday Night | 39°F | Partly Cloudy | 2 to 7 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 3 mph NW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 1 mph NW | 0% |
| Sunday | 61°F | Sunny | 1 to 7 mph W | 7% |
| Sunday Night | 36°F | Mostly Clear | 3 mph NW | 5% |
| Monday | 66°F | Sunny | 1 to 8 mph W | 2% |
| Monday Night | 40°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 69°F | Sunny | 2 to 6 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Trenton (38.608, -89.685). Updated through the day.
Growing snapshot for Trenton
Last spring frost
Apr 12
First fall frost
Oct 20
Growing season
189 days
Hardiness zone
6b
More local growing data for Trenton: nearby ZIP 62293 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Albers
Aviston
Bartelso
Beckemeyer
Breese
Carlyle
Damiansville
Germantown
Hoffman
Huey
New Baden
St. Rose
Climate data from the nearest NOAA station, Belleville Siu Rsch, Il (10.5 mi from Trenton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.