Dundas, IL Weather & Growing Conditions
Today
68°F
Slight Chance Drizzle
A slight chance of drizzle. Mostly cloudy. High near 68, with temperatures falling to around 61 in the afternoon. West southwest wind 9 to 14 mph, with gusts as high as 23 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Slight Chance Drizzle | 9 to 14 mph WSW | 10% |
| Tonight | 44°F | Slight Chance Drizzle then Partly Cloudy | 8 mph WSW | 10% |
| Thursday | 65°F | Mostly Sunny | 8 to 14 mph WSW | 0% |
| Thursday Night | 45°F | Mostly Cloudy | 5 mph WNW | 0% |
| Friday | 58°F | Partly Sunny | 3 to 12 mph NNW | 1% |
| Friday Night | 36°F | Partly Cloudy | 3 to 9 mph NNW | 0% |
| Saturday | 56°F | Mostly Sunny | 6 mph NNW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 60°F | Sunny | 1 to 8 mph WNW | 2% |
| Sunday Night | 33°F | Clear | 0 to 3 mph WNW | 1% |
| Monday | 64°F | Sunny | 0 to 6 mph WSW | 0% |
| Monday Night | 38°F | Clear | 3 mph SW | 0% |
| Tuesday | 67°F | Sunny | 2 to 6 mph W | 1% |
| Tuesday Night | 39°F | Mostly Clear | 2 mph NNW | 1% |
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 Nov 4, 2026.