Dundas, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dundas, a community in Richland County, Illinois.
Today
85°F
Sunny
Sunny, with a high near 85. East wind around 3 mph.
7-day forecast for Dundas
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 3 mph E | 0% |
| Tonight | 64°F | Mostly Clear | 2 mph ESE | 0% |
| Wednesday | 87°F | Sunny | 0 to 3 mph S | 0% |
| Wednesday Night | 68°F | Partly Cloudy then Slight Chance Rain Showers | 3 mph S | 15% |
| Thursday | 85°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 42% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph SSE | 58% |
| Friday | 85°F | Chance Showers And Thunderstorms | 2 to 6 mph SSW | 36% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 3 mph SSW | 28% |
| Saturday | 86°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 2 to 6 mph SSW | 27% |
| Saturday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph S | 21% |
| Sunday | 88°F | Sunny | 5 to 10 mph SSW | 11% |
| Sunday Night | 72°F | Mostly Clear | 8 mph SSW | 11% |
| Monday | 89°F | Sunny | 7 to 10 mph SW | 10% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 8 mph SSW | 21% |
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 Aug 4, 2026.