Williamsfield, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Williamsfield, a village in Knox County, Illinois.
Today
87°F
Sunny
Sunny, with a high near 87. South wind 3 to 7 mph.
7-day forecast for Williamsfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 3 to 7 mph S | 0% |
| Tonight | 67°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SSE | 38% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 6 mph SSW | 59% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 2 to 6 mph N | 84% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 3 mph NNE | 68% |
| Thursday Night | 63°F | Partly Cloudy | 2 mph ENE | 9% |
| Friday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 mph S | 16% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 1 mph SSE | 16% |
| Saturday | 86°F | Sunny | 2 to 6 mph SSW | 11% |
| Saturday Night | 71°F | Mostly Clear | 3 to 8 mph S | 9% |
| Sunday | 87°F | Sunny | 8 to 13 mph SSW | 7% |
| Sunday Night | 71°F | Partly Cloudy then Chance Showers And Thunderstorms | 7 to 10 mph SSW | 29% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 7 to 10 mph SSW | 29% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 10 mph SW | 30% |
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 Aug 4, 2026.