Smithfield, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithfield, a village in Fulton County, Illinois.
Today
88°F
Mostly Sunny
Mostly sunny, with a high near 88. South wind around 6 mph.
7-day forecast for Smithfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Mostly Sunny | 6 mph S | 0% |
| Tonight | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSE | 19% |
| Wednesday | 85°F | Chance Showers And Thunderstorms | 3 mph S | 51% |
| Wednesday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 3 mph NNW | 86% |
| Thursday | 82°F | Showers And Thunderstorms | 1 mph SSE | 80% |
| Thursday Night | 63°F | Partly Cloudy | 0 mph | 9% |
| Friday | 84°F | Mostly Sunny | 0 mph | 6% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 mph | 17% |
| Saturday | 87°F | Slight Chance Showers And Thunderstorms then Sunny | 2 mph SW | 15% |
| Saturday Night | 70°F | Mostly Clear | 2 mph SSW | 8% |
| Sunday | 88°F | Sunny | 2 to 8 mph SSW | 6% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 6 mph SSW | 18% |
| Monday | 89°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 7 mph SSW | 18% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 29% |
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 Aug 4, 2026.