Williamsfield, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamsfield, a village in Knox County, Illinois.
Today
59°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy, with a high near 59. West southwest wind around 15 mph, with gusts as high as 28 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Williamsfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 59°F | Slight Chance Drizzle | 15 mph WSW | 10% |
| Tonight | 44°F | Slight Chance Drizzle then Cloudy | 13 mph WSW | 10% |
| Thursday | 55°F | Cloudy then Chance Light Rain | 10 to 14 mph W | 28% |
| Thursday Night | 42°F | Chance Light Rain then Mostly Cloudy | 7 to 10 mph NW | 25% |
| Friday | 51°F | Partly Sunny | 7 to 12 mph N | 8% |
| Friday Night | 32°F | Partly Cloudy | 0 to 6 mph NNW | 0% |
| Saturday | 52°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Mostly Clear | 2 mph WNW | 2% |
| Sunday | 57°F | Sunny | 2 to 7 mph W | 1% |
| Sunday Night | 34°F | Clear | 3 mph W | 1% |
| Monday | 63°F | Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Tuesday | 64°F | Sunny | 5 mph WNW | 0% |
| Tuesday Night | 39°F | Mostly Clear | 2 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Williamsfield (40.926, -90.018). Updated through the day.
Growing snapshot for Williamsfield
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
5b
More local growing data for Williamsfield: nearby ZIP 61489 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Abingdon
Altona
East Galesburg
Galesburg
Gilson
Henderson
Knoxville
Maquon
Nekoma
Oak Run
Oneida
Rio
St. Augustine
Victoria
Wataga
Yates City
Climate data from the nearest NOAA station, Knoxville, Il (13.5 mi from Williamsfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.