Smithfield, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithfield, a village in Fulton County, Illinois.
This Afternoon
82°F
Slight Chance Rain Showers
A slight chance of rain showers before 4pm. Mostly sunny, with a high near 82. East wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Smithfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Slight Chance Rain Showers | 8 mph E | 15% |
| Tonight | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 to 9 mph SE | 16% |
| Saturday | 87°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 8 mph SSW | 17% |
| Saturday Night | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 6 mph ENE | 58% |
| Sunday | 77°F | Rain Showers Likely | 2 to 9 mph N | 67% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 7 to 10 mph NE | 68% |
| Monday | 66°F | Showers And Thunderstorms Likely | 10 mph NE | 68% |
| Monday Night | 54°F | Chance Rain Showers | 7 to 12 mph NE | 47% |
| Tuesday | 64°F | Chance Rain Showers | 9 mph NE | 29% |
| Tuesday Night | 50°F | Mostly Cloudy | 3 to 7 mph NNE | 4% |
| Wednesday | 68°F | Mostly Sunny | 6 mph NNE | 3% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 3 mph NNE | 2% |
| Thursday | 69°F | Mostly Sunny | 3 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 2 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Smithfield (40.474, -90.295). Updated through the day.
Growing snapshot for Smithfield
Last spring frost
Apr 17
First fall frost
Oct 22
Growing season
185 days
Hardiness zone
6a
More local growing data for Smithfield: nearby ZIP 61477 weather · frost dates · planting calendar · Illinois frost dates
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Vermont
Climate data from the nearest NOAA station, Prairie City 2S, Il (10.4 mi from Smithfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.