Pontiac, IL Weather & Growing Conditions
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 72, with temperatures falling to around 69 in the afternoon. South wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 20 mph S | 50% |
| Tonight | 57°F | Rain Showers | 15 to 20 mph S | 87% |
| Wednesday | 62°F | Chance Rain Showers then Mostly Cloudy | 15 mph SSW | 34% |
| Wednesday Night | 46°F | Mostly Cloudy | 10 to 15 mph SW | 6% |
| Thursday | 60°F | Partly Sunny | 10 to 15 mph WSW | 7% |
| Thursday Night | 42°F | Mostly Cloudy then Chance Rain Showers | 5 mph WNW | 32% |
| Friday | 56°F | Slight Chance Rain Showers | 5 to 10 mph NNW | 19% |
| Friday Night | 34°F | Mostly Cloudy | 0 to 10 mph NNW | 4% |
| Saturday | 54°F | Mostly Sunny | 0 to 5 mph WNW | 4% |
| Saturday Night | 32°F | Partly Cloudy | 0 mph | 3% |
| Sunday | 60°F | Sunny | 0 to 10 mph W | 11% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 8% |
| Monday | 64°F | Sunny | 0 to 10 mph WSW | 3% |
| Monday Night | 38°F | Mostly Clear | 5 mph WSW | 3% |
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 Nov 4, 2026.