Dundas, IL Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. East wind around 3 mph.
7-day forecast
| 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). Updated through the day.
Growing snapshot for Dundas, IL
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
191 days
Hardiness zone
6b
Explore more for Dundas, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Newton 6 Sse, Il (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.