Williamsville, IL Weather & Growing Conditions
Today
59°F
Patchy Drizzle
Patchy drizzle. Cloudy, with a high near 59. West southwest wind 12 to 15 mph, with gusts as high as 22 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Patchy Drizzle | 12 to 15 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 | 33°F | Partly Cloudy | 2 to 8 mph NNW | 0% |
| Saturday | 53°F | Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph WNW | 1% |
| Sunday | 58°F | Sunny | 2 to 8 mph WNW | 1% |
| Sunday Night | 34°F | Clear | 1 to 5 mph W | 1% |
| Monday | 64°F | Sunny | 1 to 7 mph SW | 0% |
| Monday Night | 39°F | Clear | 5 mph SW | 0% |
| Tuesday | 66°F | Sunny | 5 mph WNW | 1% |
| Tuesday Night | 40°F | Mostly Clear | 2 mph NNE | 1% |
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 4, 2026.