Pontiac, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Pontiac, a city in Livingston County, Illinois.

This Afternoon

71°F

Chance Rain Showers

A chance of rain showers. Cloudy. High near 71, with temperatures falling to around 68 in the afternoon. South wind 15 to 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 for Pontiac

When	Temp	Forecast	Wind	Precip
This Afternoon	71°F	Chance Rain Showers	15 to 20 mph S	51%
Tonight	57°F	Rain Showers	15 to 20 mph S	87%
Wednesday	62°F	Chance Rain Showers then Mostly Cloudy	15 mph SW	34%
Wednesday Night	46°F	Mostly Cloudy	10 mph SW	6%
Thursday	60°F	Partly Sunny	10 to 15 mph WSW	7%
Thursday Night	42°F	Mostly Cloudy then Chance Rain Showers	0 to 5 mph WNW	33%
Friday	55°F	Slight Chance Rain Showers	5 to 10 mph NNW	20%
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	59°F	Sunny	0 to 10 mph W	12%
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) for Pontiac (40.889, -88.641). Updated through the day.

Growing snapshot for Pontiac

Last spring frost

Apr 16

First fall frost

Oct 24

Growing season

191 days

Hardiness zone

More local growing data for Pontiac: nearby ZIP 61764 weather · frost dates · planting calendar · Illinois frost dates

Nearby towns & communities

Campus Chatsworth Cornell Cullom Dwight Emington Fairbury Flanagan Forrest Long Point Odell Saunemin Strawn

All Illinois locations ›

Climate data from the nearest NOAA station, Pontiac, Il (0.7 mi from Pontiac). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.