Williamsville, IL Weather & Growing Conditions
This Afternoon
59°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy, with a high near 59. West southwest wind around 14 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 59°F | Slight Chance Drizzle | 14 mph WSW | 10% |
| Tonight | 46°F | Patchy Drizzle then Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 58°F | Partly Sunny then Slight Chance Light Rain | 9 to 14 mph WSW | 15% |
| Thursday Night | 42°F | Slight Chance Light Rain then Mostly Cloudy | 6 to 10 mph NW | 19% |
| Friday | 51°F | Partly Sunny | 8 to 12 mph N | 1% |
| Friday Night | 31°F | Partly Cloudy | 2 to 7 mph NNW | 0% |
| Saturday | 52°F | Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 31°F | Mostly Clear | 2 mph WNW | 0% |
| Sunday | 59°F | Sunny | 2 to 7 mph W | 0% |
| Sunday Night | 34°F | Mostly Clear | 3 mph W | 0% |
| Monday | 64°F | Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 39°F | Clear | 2 to 6 mph WSW | 0% |
| Tuesday | 65°F | Sunny | 5 mph W | 2% |
| Tuesday Night | 39°F | Mostly Clear | 2 mph NNW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williamsville, IL
Last spring frost
Apr 14
First fall frost
Oct 20
Growing season
187 days
Hardiness zone
6a
Explore more for Williamsville, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Springfield Capital Ap, Il (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.