Dundas, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dundas, a community in Richland County, Illinois.
Tonight
59°F
Rain
Rain before 3am, then a chance of rain showers. Mostly cloudy, with a low around 59. South wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Dundas
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Rain | 13 to 18 mph S | 95% |
| Wednesday | 67°F | Slight Chance Rain Showers then Partly Sunny | 8 to 13 mph SW | 21% |
| Wednesday Night | 45°F | Mostly Cloudy | 6 mph WSW | 0% |
| Thursday | 67°F | Sunny | 5 to 13 mph WSW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 5 mph WNW | 4% |
| Friday | 60°F | Mostly Cloudy | 3 to 10 mph NNW | 3% |
| Friday Night | 38°F | Partly Cloudy | 3 to 7 mph NNW | 3% |
| Saturday | 57°F | Mostly Sunny | 6 mph NNW | 1% |
| Saturday Night | 35°F | Partly Cloudy | 2 mph WNW | 2% |
| Sunday | 61°F | Mostly Sunny | 1 to 8 mph W | 6% |
| Sunday Night | 34°F | Mostly Clear | 5 mph WNW | 5% |
| Monday | 64°F | Sunny | 2 to 9 mph W | 2% |
| Monday Night | 38°F | Mostly Clear | 6 mph SW | 1% |
| Tuesday | 68°F | Sunny | 3 to 7 mph WSW | 1% |
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 Nov 4, 2026.