Dundas, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dundas, a community in Richland County, Illinois.
Tonight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. East southeast wind 3 to 7 mph.
7-day forecast for Dundas
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy | 3 to 7 mph ESE | 9% |
| Saturday | 95°F | Sunny | 3 to 9 mph SW | 12% |
| Saturday Night | 72°F | Mostly Cloudy | 7 mph S | 7% |
| Sunday | 94°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph W | 19% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 9 mph NNE | 36% |
| Monday | 82°F | Showers And Thunderstorms Likely | 9 to 13 mph NE | 55% |
| Monday Night | 59°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 9 to 14 mph NNE | 55% |
| Tuesday | 74°F | Chance Showers And Thunderstorms then Partly Sunny | 13 mph NNE | 39% |
| Tuesday Night | 56°F | Mostly Cloudy | 7 to 13 mph NNE | 9% |
| Wednesday | 75°F | Partly Sunny | 8 to 12 mph NNE | 4% |
| Wednesday Night | 56°F | Partly Cloudy | 5 to 12 mph NNE | 4% |
| Thursday | 75°F | Mostly Sunny | 5 to 10 mph NNE | 4% |
| Thursday Night | 57°F | Partly Cloudy | 5 to 9 mph NNE | 4% |
| Friday | 77°F | Mostly Sunny | 5 to 10 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Dundas (38.835, -88.085). Updated through the day.
Growing snapshot for Dundas
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6b
More local growing data for Dundas: nearby ZIP 62425 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Newton 6 Sse, Il (5.4 mi from Dundas). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.