St. David, IL Weather & Growing Conditions
This Afternoon
85°F
Mostly Cloudy
Mostly cloudy, with a high near 85. South wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Mostly Cloudy | 7 mph S | 8% |
| Tonight | 68°F | Slight Chance Showers And Thunderstorms | 6 mph SSW | 38% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 3 to 12 mph NNE | 51% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 9 to 13 mph NE | 56% |
| Monday | 66°F | Showers And Thunderstorms | 10 mph ENE | 76% |
| Monday Night | 55°F | Rain Showers Likely | 9 mph ENE | 63% |
| Tuesday | 64°F | Rain Showers Likely | 9 mph NE | 57% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 8 mph NNE | 11% |
| Wednesday | 66°F | Partly Sunny | 7 mph NNE | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 6 mph NNE | 2% |
| Thursday | 70°F | Mostly Sunny | 3 mph NNE | 2% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 2 mph NE | 15% |
| Friday | 73°F | Slight Chance Rain Showers then Partly Sunny | 3 mph NE | 15% |
| Friday Night | 55°F | Partly Cloudy | 2 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. David, IL
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
185 days
Hardiness zone
6a
Explore more for St. David, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Havana, Il (13.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.