Farmington, IL Weather & Growing Conditions
Today
87°F
Mostly Sunny
Mostly sunny, with a high near 87. South wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny | 3 to 7 mph S | 0% |
| Tonight | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSE | 23% |
| Wednesday | 83°F | Chance Showers And Thunderstorms | 5 mph SSW | 53% |
| Wednesday Night | 65°F | Showers And Thunderstorms | 5 mph NNW | 86% |
| Thursday | 81°F | Showers And Thunderstorms | 3 mph SSE | 77% |
| Thursday Night | 64°F | Partly Cloudy | 2 mph ENE | 10% |
| Friday | 83°F | Mostly Sunny | 1 mph WNW | 10% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 1 mph SSW | 15% |
| Saturday | 86°F | Sunny | 5 mph SSW | 13% |
| Saturday Night | 70°F | Mostly Clear | 2 to 7 mph S | 9% |
| Sunday | 88°F | Sunny | 7 to 10 mph SSW | 7% |
| Sunday Night | 71°F | Mostly Clear then Chance Showers And Thunderstorms | 6 to 9 mph SSW | 25% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 6 to 9 mph SSW | 25% |
| Monday Night | 72°F | Slight Chance Showers And Thunderstorms | 8 mph SW | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Farmington, IL
Last spring frost
Apr 16
First fall frost
Oct 23
Growing season
189 days
Hardiness zone
5b
Explore more for Farmington, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Peoria Gtr Peoria Ap, Il (18.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.