Pontiac, IL Weather & Growing Conditions
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Tonight | 66°F | Partly Cloudy | 5 mph S | 1% |
| Wednesday | 83°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph SSW | 42% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph WNW | 88% |
| Thursday | 81°F | Showers And Thunderstorms | 0 to 5 mph S | 84% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms | 0 mph | 35% |
| Friday | 83°F | Mostly Sunny | 0 mph | 9% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 0 mph | 21% |
| Saturday | 86°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 70°F | Mostly Clear | 0 to 5 mph SSW | 11% |
| Sunday | 88°F | Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 24% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 24% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 32% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pontiac, IL
Last spring frost
Apr 16
First fall frost
Oct 24
Growing season
191 days
Hardiness zone
6a
Explore more for Pontiac, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Pontiac, Il (0.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.